Tattoo Ideas for Life
Biohazard Extreme
Disposal of sewage sludge - application-environment problems - an overview
SLUDGE DISPOSAL - land issues APPLICATION OF THE ENVIRONMENT - AN OVERVIEW
Md. Wasim Aktar
Pesticide Residue Laboratory, Department of Chemical Agricultural
Bidhan Chandra Krishi Viswavidyalaya, Mohanpur-741252, Nadia, West Bengal, India
1. Introduction
Most processes wastewater treatment to produce a sludge that must be eliminated. Conventional secondary treatment plants typically generate a primary sludge in stage of primary sedimentation and secondary treatment, biological, sludge final sedimentation after the biological process. Features secondary sludge vary with the type of biological processes, and often it is mixed with primary sludge before treatment and disposal. About half operating costs of secondary treatment plants in Europe can be associated with treatment and sludge disposal. Disposal of sludge raw sewage or treated can significantly reduce sludge disposal cost component of wastewater treatment and provide much needs nitrogen and phosphorus from many cultures. Very rarely, sewer systems that transport wastewater domestic treatment plants, industrial effluents and stormwater runoff from roads and other paved areas are often dumped into sewers. Thus, the sludge contains, in addition to organic waste, trace amounts of many pollutants used in our modern society. Some of these substances can be phytotoxic and some are toxic to humans and / or animals so it is necessary to control soil concentrations of elements potentially toxic (PTE) and rates of soil application. The health risk of chemicals in sewage sludge spread on land was considered by Dean and Suess1
Sewage sludge also contain pathogenic bacteria, viruses and protozoa and other helminth parasites that can lead to potential dangers to human health, animals and plants. A WHO (1981) Report on health risk microbes in sewage sludge spread on land and Taenia salmonella identified as giving rise to greater concern. The number of organisms parasites and pathogens in sludge can be significantly reduced before field application by the appropriate sludge treatment and the potential risk health is further reduced by the effects of climate, soil and micro-organisms after the sludge is applied to the soil. However, in the case of certain crops, restrictions on planting, grazing and harvesting are required.
Apart from these concerns, sewage also contain useful concentrations of nitrogen, phosphorus and organic matter. The availability of phosphorus contained in the application year is about 50% and is independent of any treatment of sludge before. nitrogen availability is more dependent on sludge treatment, sludge liquids nitrogen treated and dehydrated sludge processed slowly releasing the benefits for current crops produced on a relatively long. Anaerobically digested liquid sludge has a high content of ammonia nitrogen that is readily available to plants and can be particularly beneficial to grasslands. The organic matter in sludge can improve the water holding capacity and structure of some soils, especially when applied in the form of dewatered sludge cake.
2. What is sludge?
Residuals, biosolids, sludge, wastewater, wastewater by-product, compost: there are many names for the sludge and sludge. The term "sludge" is used as most people understand this: sometimes the solid material and sometimes liquids generated by treatment plants and wastewater used as fertilizer in fields, gravel pits, and on lots in Forest throughout the state. The sludge can classified as "Class A" if she was treated to reduce germs to background levels (normally present in soils) and "Class B" if it has been treated so that the germs are reduced by approximately 90%.
3. Composition of sewage sludge:
The nature of sewage sludge depends on the process of wastewater treatment and the source of wastewater. In general, it contains both toxic and nontoxic organic. Of the two, non-toxic compounds are most prevalent include all plant materials and animal, including proteins, amino acids, sugars and fats. Toxic organic compound contains polynuclear aromatic hydrocarbons (PAHs) alkylphenols, polychlorinated biphenyls (PCBs) and organochlorine pesticides, monocyclic aromatic, chloro-benzenes, aromatic and alkylamines, dioxins polychlorinated phenols, etc. In addition to sewage sludge waste organic matter also contains traces of many pollutants such as copper, zinc, nickel, cadmium, lead, arsenic, chromium, selenium, etc. Some of these chemicals may be phytotoxic and some are toxic to humans and / or animals, it is therefore necessary to control soil concentrations of potentially toxic elements and their application rates on the ground. sewage sludge also contain pathogenic bacteria, viruses and protozoan parasites and other helminths that may give rise to potential health hazards humans, animals and plants. Apart from these points of concern of sewage sludge also contains useful concentrations of N, P and organic matter. Each component of the mud has its own environmental impact, which must be taken into account when choosing the route of evacuation.
4. Treatment Sludge
Increasing urbanization and industrialization have led to a dramatic increase in the volume of wastewater produced in the world. Step wastewater treatment focuses on the various pollutants (up to 90%) in wastewater sludge, normally containing between 1% and 2% by weight dry solids. The wastewater treatment typically include the following processes to treat sludge for production of finished products suitable for use or disposal:
methods of sludge treatment
Process Description
pasteurization of the sludge at least 30 minutes at 70 º C or less 4 hours at 55 º C (or intermediate good conditions), followed in all cases by primary mesophilic anaerobic digestion.
Mesophilic anaerobic digestion retention period average of at least 12 days primary digestion in temperature range of 35 º C ± 3 º C or atleast 20 days primary digestion in temperature range 25 º C ± 3 º C, in each case followed by a second step which provides a mean retention period of at least 14 days.
Thermophilic aerobic digestion average retention period of at least 7 days digestion. All sludge to be subject to a minimum of 55 º C for a period of at least 4 hours.
Composting Compost should be maintained at 40 º C for at least 5 days and 4 hours during this period to a minimum of 55 º C in the cell body followed by a maturation period sufficient to ensure that the compost reaction process is virtually complete.
lime stabilization of liquid sludge Adding lime to raise the pH to 12.0 and more than sufficient to ensure that the pH is not less of 12 for a minimum period of 2 hours. The sludge can then be used directly.
Liquid storage of untreated liquid sludge for a period minimum of 3 months.
Packaging dehydration and storage of untreated sludge with lime or other coagulants followed by dewatering and storage cake for a minimum period of 3 months. If sludge has been subject to primary mesophilic anaerobic digestion of storage for a period minimum of 14 days.
5. agricultural application
The application of sewage sludge as fertilizer "security" began to good after the 1988 ban on dumping sewage sludge into the ocean. When the Ocean Dumping Ban Act of 1988 came into force, municipalities and Govt. left with a new problem - how to get rid of tons of sludge they generate on a daily. The federal Environmental Protection Agency (EPA) stepped in with a plan to "solve" this problem by promoting sludge (sometimes called "biosolids," a public relations term is used interchangeably by the EPA with the "sludge" technical term) to be spread as fertilizer on land - where people live, work and play. Although the viscous, black cake without added organic matter and fertilizer for poor soils, making them productive and profitable, major limitations are due to these factors: pathogens, heavy metals, toxic organic compounds. Therefore, the LFS has toxic chemicals in air, water, soil, crops and in us. So to call this sludge "fertilizer" is to be called a soup "food" which, if it contains meat and vegetables, also contains a little lead, a little arsenic, and perhaps hundreds or thousands of other toxic organic and inorganic whose impact ranges from carcinogenic for birth defects teratogenic (inducing). "Most people want a simple answer, is it good or is it bad. The answer is not as Simple as that. It is not entirely risk free, but it has advantages. Just like driving a "vehicle, Sanden said.
Benefits sewage sludge on agricultural land
• nutrients such as nitrogen for agricultural purposes, phosphorus, potassium and sulfur can be returned to earth
• The levels of soil organic matter was increased to 12% - 15%
• Groundwater quality and surface water are maintained
• Decrease in bulk density and increase the non-capillary pore space
• Improve the aggregation soil particles
• No significant health or nuisance problems are
6. Sludge problem
Sludge contains quantities measurable pollutants such as heavy metals, dioxin and other toxic chemicals. Sludge also contain pathogens - the seeds of man, bacteria, viruses and parasites. Sludge and odor: the smell of the sludge is more than a nuisance, it is a threat to public health, which has been linked to respiratory problems and death. Spreading sludge distributes pollutants from cities to rural areas, far from where they were produced. State and federal agencies of various countries to regulate the land application of sludge, but regulation of these wastes is difficult and problematic. Many scientists agree that the current rules of application do not protect human health, agricultural productivity, or the environment. Lack of funding to ensure proper regulatory control and the nature of the wastewater to allow the spreading of sludge of unknown quality to occur on our lands.
Problems with sludge include:
? Sludge containing heavy metals, chemicals toxins and pathogens.
? The analysis and the regulation of sludge is insufficient and problematic.
? odors from sludges are a threat to public health and lower quality of life.
7. The problem with mud
7.1. How to become toxic sludge fertilizer
In traditional agricultural societies, human waste was often used to enrich the soil. The industrial revolution caused a increased urbanization and the need for cities to develop primitive sewage systems to eliminate human waste. Pipe and gutters were built to discharge sewage directly into our lakes, rivers and oceans. As the industry grew in World Factories began to use these primitive sewage systems to dispose of their waste. This practice continued even in 20th century, when the industry began to make extensive use of toxic chemicals. Using the local sewer system as a dumping ground for Toxic waste was an easy solution to their disposal problems and was less expensive than treatment of their waste on site. Of wastewater loaded with toxic chemicals major public health and environmental disasters around the world: the rivers have caught fire, public water drinking has become polluted and waste washed up on our beaches. Public outcry over the increasing number of disasters led to the adoption of the Law Federal Clean Water in 1972. This act standards of water quality at the national level and provided funds to communities to improve sewer systems and build wastewater treatment facilities. Unfortunately, instead of addressing the causes of the problem stopping the use and disposal of industrial toxic chemicals act instead regulated the amount of pollution of major industries could release into sewers.
In the late 1970s, the sewers were built in depth through the country. treatment plants were built sewage to separate solids from water, and after a natural treatment and chemical release water into the environment, cleaning up human waste. Unfortunately, they were not built to handle waste toxic chemicals. Although these systems and wastewater treatment facilities of wastewater improved standards of public health and water quality, they have a defect ironic. The treatment process creates cleaner water, but also creates a toxic byproduct: sludge. In fact, the Clean Water Act defines rightly sludge as a pollutant. Like all the waste sludge must be disposed of in some way. What to do with mud was a source of controversy for the past three decades in the world. In the 1970s and 80s, the federal Environmental Protection Agency (EPA) strictly regulated land application of sludge, effectively prohibiting most waste to be used on farmland. treatment facilities sewage sludge could have in one of three ways: by sending it to a landfill or by incinerating or by throwing 100 miles offshore in the ocean.2
Ocean disposal has finally created large submarines dead zones. In response to public concerns, Congress passed the Ocean Dumping Act, which prohibits ocean dumping of sludge in the sludge disposal 1992.3 was then largely limited to landfill and incineration has become expensive for the treatment plant wastewater. MWTPs then lobbied EPA to relax its standards for land application of sludge on farmland. After a number of draft rewrite of EPA regulations, corporate marketing companies and sludge from municipal wastewater treatment plants were able to relax the limits of toxins in sewage sludge. What was once considered a hazardous waste is a fertilizer? By classifying the sludge as fertilizer, it has become exempt several waste management regulations.
7.2. Marketing of toxic sludge
Municipal facilities for water treatment sludge depend on brokers Company to dispose of their sludge. To dispose of these private companies to convince farmers and landowners across the country to spread sludge on their fields as a nutritional supplement for their crops. Sludge is sold to landowners and consumers in two ways. The first and most obvious, is offering free sludge. By convincing the individual owners that sludge is "agronomic benefit" on their land, brokers are finding sludge disposal sites sludge extremely cheap, which otherwise must be transported in landfills or incinerators at a cost of about $ 70 ton.4
Companies rely on the fact that everybody wins: the processing plants have an option disposal good market for their sludge, giving taxpayers a break, and landowners free of nutrients for their fields. As a result accurate, brokers walk away with sludge disposal costs of the treatment facility. Brokers sludge also escape liability potential, which is now borne by the owner or operator of property. The second way is marketed sludge is composted or palletizing. Then it can be sold or given as compost or fertilizer. Since the weakening of the regulation of sludge in the late 1980s, citizens across the world are fighting to keep the sludge being spread on fields and farmland in their communities. Activists fighting sludge cons are formidable opponents. water treatment facilities and sludge brokers have formed powerful trade groups, such as New England and biosolids residues Association (NEBRA). NEBRA, in turn, is part of a group bigger and more powerful: the National Biosolids Partnership, which is a coalition of groups such as EPA and Water Environment Federation, whose main responsibility is to change "public perception" about the application sludge.
7.3. Secrets of toxic sludge
Spread sludge is necessary to have laws toxic levels below certain limits and it is treated with lime to reduce pathogen levels. However, no mud in the World is completely free of toxic chemicals or pathogens. In fact, after it is processed, the class B sludge still contains a significant amount of pathogens5.
7.4. Toxic sludge
A. Heavy metals
All sludge in the world contain heavy metals like arsenic, cadmium, chromium, copper, lead, mercury, molybdenum, nickel, selenium and zinc.6 These metals are persistent, that is, they do not decompose in the environment and thus develop over time. As the Cornell Cooperative Extension states, "the most heavy metals are still in the soil for long periods ranging from decades to centuries." Heavy metals in sludge applied land thus become permanent additions to the total amount in soil. Even very small amounts of metals heavy sludge, therefore, are dangerous.7 high concentrations of arsenic in food or water can be fatal. Cadmium, chromium, nickel and selenium have been linked to cancer. Cadmium has also been linked to kidney problems, miscarriage and stillbirth. Copper, nickel and zinc are known to cause growth problems in crops. Children exposed to lead may develop behavioral problems and learning. Mercury exposure at key points in fetal development can cause learning disabilities and neurological disorders. Molybdenum accumulates in the livestock eat grass; ingested in excess, can cause anemia, diarrhea, and growth problems.8 These metals can be absorbed by plants that are grown on the sludge and re-enter the human food chain through animal feed. These Metals can also seep into groundwater. highly acidic soils, like those found in Maine, may exacerbate heavy metals leaching.9
B. Pathogens: bacteria, viruses and parasites
Sludge, by its very nature, contains human pathogens: germs like bacteria, viruses and parasites. Considering that exposure to heavy metals can cause problems over time, exposure to these germs is more acute and can cause health problems almost immediately. Due to the extremely large number of pathogens that exist in the world it is impossible to test sludge for all types of pathogens. Some common pathogens in sludge include bacteria E-coli and Salmonella, Virus hepatitis A, and parasitic worms. Pathogens can cause intestinal problems, other serious illnesses and death. sludge applied Land can be treated close to eliminating pathogens. By composting the sludge, for example, levels of pathogens can be reduced significantly. Unfortunately, state and federal laws allow for "Class B" sludge, which was not treated in the strictest methods of reducing pathogen spread. In other words, the sludge with live pathogen spreads in throughout the state. Unfortunately for residents and workers in northern New England, humid climates and covered to encourage the growth of agents pathogens. The researchers found that pathogens can survive in mud for weeks, months or years after treatment processes reduction.
Humans can be exposed to pathogens in sludge in a number of ways. We can eat vegetables that have on these pathogens. Children can accidentally access a field of mud and being exposed to germs. Pathogens can also spread by domestic or wild animals like deer who walk through a field of mud.
Dioxins C.: "The Darth Vader of chemicals"
Dioxin is the unwanted byproduct of chemical processes involving chlorine. According to the EPA, the spreading of sludge is the main provider of land nationally.10 dioxin Dioxin is a known carcinogen and has been linked to reproductive problems, genetic damage, and endometriosis. Scientific evidence indicates that there is no safe level of exposure to dioxin dioxin.11 As one expert familiar called dioxin is "the Darth Vader of chemicals," because you can not see or taste, but it is fatal. The source of contamination Dioxins in sludge is not known. He could be discharged into the sewer system by unknown sources, industrial or residential. Dairy cattle grazing on land sludged ingest dioxins and chemicals will then enter humans through milk and meat.
7.5. What we do not know can hurt us
The federal Environmental Protection Agency estimates that there are 70,000 synthetic (not naturally occurring) chemicals. Yet only 2% of these chemicals have been fully tested. In fact, even the most basic of results toxicity tests can be found on the public record by nearly 75% of the most widely used of these chemicals. How these chemicals affect human health and how they interact with each other in the environment (the "synergy") are not always known. Despite this, the industry needs only to report the discharge of 1% of these chemicals into rivers and sewers. While industries and households release thousands of chemicals, mud world is regularly tested for some heavy metals, and sometimes tested for pesticides dioxins and toxic.
8. Source of toxic chemicals
Sludge containing heavy metals and other pollutants because industry and households use and release too many toxic chemicals. The sources of contaminants in sludge are many, depending on the specific treatment facility water and the community it serves. Sources of contamination are industrial discharges, releases small business news from the hospital, household waste, leachate from landfills and Superfund sites, including nuclear waste landfills, and water and sewer Municipal whole.12Everything as that is discharged into a drain that leads to a treatment plant water could become a part of the mud that the installation product. If a worker at an industrial plant for toxic chemicals accidentally discharges into sewers instead of eliminating a appropriately, these chemicals could be found in the mud. Similarly, if a home gardener rinsed bottle containing toxic pesticides in the sink, toxic pesticides could find their way to the mud.
8.1. Industrial Risks
As indicated above, many chemicals used by industry have not been properly tested and are not regulated or reported. Moreover, even the most secure facilities, accidents occur and toxic chemicals can be released into the waste stream. World requires treatment plant wastewater to work with the major industries on the reduction and monitoring their waste discharge. This "pre-treatment process is required for companies that emit large amounts waste into sewers or use a large amount of chemicals that could affect the operation of the sewer system. Unfortunately, a both companies release heavy metals and other toxins in the sewer, there is no process to remove these chemicals from the mud. In addition, all industries in the country can carry 33 pounds of hazardous waste each month in the factories of wastewater treatment, without penalty or reporting.13
8.2. Small Business Risks
Many small businesses are not regulated for their releases of toxic substances. They are not included in the pretreatment process. Although garages, dentist offices, photo developers, dry cleaners, and other small companies can not release an individual large amount of toxic chemicals, taken together their contribution to chemicals in the sludge could be dangerous.
8.3. Hospital Risk
All hospitals are required to dispose of toxic chemicals and biological hazards in a state approved manner. Nevertheless, accidents happen: hermometer a broken mercury to other human pathogens to wash into sewers, hospitals can contaminate sludge.
8.4. Contamination of municipal water and sewer
Many cities and towns have municipal water and sewer pipes made with lead and copper. metals lead, copper, and other often seep into the waste stream and contaminated sludge. Sludge contamination may also occur if the shell of a city is polluted by pesticides and other chemicals for which testing is not required.
8.5. Household Hazards
Pesticides (including shampoos), heavy cleaners and hair coloring products, products containing toxic chemicals abound. Any of these Chemicals poured down the drain could end up being spread over a farm field or a forest.
9. the regulation of sludge
It is almost impossible to know the exact level of toxic materials in each batch of sludge, because what is published in the waste stream varies from day to day. Although waste water is treated in the facilities of sewage treatment for several days, not every batch of sludge is tested before it leaves the factory. It is more due to the economy than concerns for the protection of health, the sludge producers do not test most often waste. For example, waste is often tested for dioxins only twice a year because of the cost of the test. A worker may accidentally spill pesticides in a sink or storm, or someone might illegally dump more toxic chemicals into sewers, and no matter how the regulations are strict in the law books, testing could miss these sudden increases of contaminants. Regulation and testing can not guarantee security sludge until the toxic chemicals are removed from the industrial use of households.
10. effects of sludge
"Odors are a temporary necessary evil in the practice of agriculture." 14 sludge-like odor of manure and the smell dissipates "In a few days." Despite industry propaganda, studies have shown that odors from sludge is not only a nuisance, they are a threat to public health. noxious gases, called organic amines, can develop chemical reactions that occur in the sludge. These gases are released when the pH of the sludge is raised above 10, for example when lime is added. Studies suggest that sludge odors can cause health problems humans as far as 1600 feet from a study by a regulator site.15A former EPA sludge odors associated with sludge "a severe irritation of mucous membranes followed by respiratory infections "among residents living near a site sludge. Irritation of eyes, throat and skin are infected by pathogens in the sludge more likely. The study was conducted following the death of a suffering New Hampshire man of respiratory distress in the vicinity of a mud site.16 residents near sludge sites were not the only victims the smell of the sludge. Symptoms associated with organic amine poisoning occur frequently among workers in factories and waste treatment Drivers who haul sludge.
10.1. Deaths related to sludge
At least two deaths have been associated with spreading sludge. In October 1994, an eleven year old boy named Tony Behun, riding a dirt bike near his home in Osceola Mills, Pennsylvania. Unknowingly, the boy mounted across a field covered with a Class B sludge. He returned home covered in dust and dirt. Two days later, he developed a sore throat, headache, and a boil on his left arm. Brenda Robertson, his mother took him to the doctor, who prescribed antibiotics against influenza. The next day, Tony had difficulty breathing. He died after being transported by helicopter to a Pittsburgh hospital. The final diagnosis was that Tony was died of a bacterial infection. How his son contracted the infection remained a mystery for Brenda Robertson that five years later, when she read about an investigation into the death of his son by the Pennsylvania Department of Environmental Protection. Brenda without consulting the State has issued a report concluding that Tony died of a bee sting and the class B sludge has been spread over the property he went astride.
Another death occurred related sludge in Greenland, New Hampshire. In late October of 1995, the Marshall family has their otherwise quiet life tragically interrupted. Sludge was dumped in a field in their rural neighborhood. This was only the beginning of problems for residents. On Halloween, Joanne Marshall rushed home from work to his little girl's door-to-contractor. When she arrived home and jumped out of her car, she was "greeted with such a stench, it took her breath away." 17 The Marshalls and their neighbors began suffering from nausea, vomiting, stomach cramps, headaches, flu-like symptoms, slowed reflexes and breathing problems.
10.2. The evaluation Environmental and cure:
Recycling sewage sludge on agricultural land to obtain an advantage essential nutrients for plants and matter Organic it contains, seems a reasonable and rational management of a material that would otherwise require disposal by other means not beneficial. But sludge also contains minerals, organic and biological contaminants such care, management is required to avoid potential environmental effects problems. The problems are listed in the table below. Wider application of sewage sludge can reduce the soil pH. This can be avoided, if soil pH is increased by the application of lime or sludge application rates are limited in some way.
The no. bacteria different genres in sludge varies. In general, a number of coliform total of 10 to 10 can be found per gram dry weight. While coliforms Fecal typically represent 10 to 10 per gram dry weight. Pathogens must be reduced to levels that are not likely to be a threat to public health and the environment in terms of usage process to significantly reduce pathogens such as digestion, drying, heating and high pH or its equivalent is most commonly used one.
For control of oral contraceptives sludge from two basic approaches we ar - physico-chemical or microbiological means either the high-temperature oxidation (burning) or dechlorination reductive (Pyrolysis in a hydrogen atmosphere). Allow to reach the level of risk concentrations in soil presticide combined and the mixture sludge should be less than 1.25 mg / kg dry weight.
The environmental impact and risk assessment for benefits recycling of sewage sludge on agricultural land (B = beneficial effect, F = low risk, P = possible risk NA = Not applicable.)
Environm ental-parameter PTE pathogens contaminating organic nitrogen phosphorus organic matter
Human health LPLBBB
Crop yields LLLBBB
Animal health LLLBBB
Groundwater quality LLLLLP
Surface water quality LLLPPB
Air Quality LLLP NA NA
Soil fertility PLLBBB
Natural ecosystems PPPPLB
11. the regulation of sludge
Sludge, by its nature Similarly, it is difficult to regulate. According to what chemicals are released into sewers different every minute, the toxicity of the sludge from the State can vary from day to day, minute by minute. Regulation of sludge does not adequately protect public health and the environment.
11.1. Regulations problems:
• Standards for low pollution;
• Allow for the application of sludge containing live pathogens;
• Discourage municipalities to be precautionary public health oriented and not allowing them to stricter standards than the State, and
• marginalize the voices of citizens in the process of industrial sludge has greater access to regulators that the state the average citizen.
11.2. Heavy metal standards (ppm)
Heavy Metal Denmark Finland Norway Sweden Germany Netherlands European Union
Arsenic 25 N / AN / AN / AN 0.15 / AN / A
Cadmium 0.8 2.0 1.5 5 or 10 * 1.25 2.5 20
Chrome 100 100 N / AN 900 75 100 / A
Copper 1000 600 N / A 800 75 1000 1000
Lead 120 100 100 900 100 80 750
Mercury 0.8 2.5 1 8 0.75 3 16
Nickel 30 50 100 200 30 50 300
Zinc 4000 800 1500 2500 300 800 2500
* Source: Harrison, et al. 1999 7
11.3. Sludge vs. natural soil
Heavy Metal Sludge average (ppm) natural soil (ppm) times higher that the natural soil
Arsenic 6.5 4.7 3.1
Cadmium 2.4 0.37 6.4
Copper 388.0 23.3 16.6
Chromium 33.3 30 1.1
Lead 61.5 17 3.6
0003 Mercury 2.1 400
Molybdenum 7.5 0.79 9.4
Nickel 22.8 18 1.2
Selenium 2.6 0.45 5.7
Zinc 468.5 68.5 8.6
11.4. The standard values for organic compounds
Compounds Concentration in sludge
HAP 1-10 mg / kg.
Alkyl phenols 100 - 3000 mg / kg.
PCBs from 1 to 20 mg / kg.
Poly-p-dibenzo dioxins very low organochlorine pesticides monocyclic aromatic chloro benzenes and aromatic alkylamines 0 - 1mg./Kg.
Phenols 0 - 5mg./Kg.
12. The solution of the sludge
If the sludge spread in our communities is dangerous, where should it go? What are we supposed to do this waste? The real question is, how can we eliminate the spread of toxic pollutants in our land and how can we remove these contaminants from our treatment plant wastewater so that human waste has become a commodity really useful and safe? Because the sludge contains toxic chemicals and other pollutants, the best solution to our problem of sludge is the reduction of these contaminants at source. By significantly reducing the use and disposal of industrial chemicals and toxic household, we can significantly reduce the levels of chemicals in sludge. Up what long-term goal of eliminating the use and disposal of toxic chemicals is achieved, the State should:
1. Prohibit the use of sludge containing industrial waste.
2. Require more stringent level of pathogen reduction.
3. Broaden and strengthen the testing and the limits of toxic sludge.
4. Authorize municipalities to enact ordinances that are stricter than the regulations state at the meeting of a city or voting process throughout the city.
5. Predicting long-term pH monitoring and maintenance of metal sites sludge.
In addition to protections statewide, municipalities must also apply their own protection orders by strong control sludge. It is, after all, local communities who are most threatened by the spreading of sludge.
13. Sludge disposal
The elimination Sludge is a global problem and a wide variety of escape routes have been adopted as indicated by local conditions. The last place of Rest of sludge must be either on the ground, air or water. Spreading sludge incineration air largly employs high or pyrolysis temperature. Although this reduction is sufficient to "stabilize" the mud, a large volume remains for disposal. Disposal sewage sludge in the ocean now banned because of its perceived effects of the environment. The main disposal methods sludge treatment plants used by water treatment lagoons are the transfer or sale, used for municipal gardens, used for growing grass instant application. The rest of the sludge is either stored or landfilled.
Removal and application sludge should contain the following
1. The application must contain a summary of the types of crops should be grown on the proposed site the method of sludge application, and a planned schedule propagation. The application must also include an analysis of soil nutrients representative for the site.
2. The sludge must provide "agronomic benefits" to the crops grown on this land - which means that the manufacturer must demonstrate that the site needs nutrients provided by the mud. Farms using sludge are required to have a nutrient management specialist licensed develop a management plan for nutrient whole farm. This plan is the basis for the determination above that the additional nutrients are needed on the farm.19
3. The application must show that "the State Water will be protected." In practice, state regulators Assuming that the waters of the state will be protected as long as certain setbacks and distribution requirements are provided in the application.
4. At To this end, the sludge can not be spread when the ground is frozen, snow covered and waterlogged. The sludge can be spread on land that fosters growth of water-loving plants such as wetlands, swamps and others.
5. The floor of a proposed sludge site should have a cap of six inches soil and a minimum depth to bedrock of 10 inches for perennial crops (such as hay) and 20 inches for row crops (like corn).
6. For Class B sludge, diffusion may not occur within 25 feet of waterways on the site, including gullies, ravines and depressions. sites sludge can not be located within 75 feet of a river, perennial stream, pond or large.
7. The application must include a statement as to whether or not the site is located on or near a protected natural resource, a sensitive area, and / or watershed water directly.
8. The producer must demonstrate that the activity spreading sludge will meet the traffic to the site. This standard is intended to be satisfied if the spreading of sludge activity will result in 16 or fewer vehicle trips per day.20
9. The application must include a plan site-specific odor control to avoid unpleasant odors in the surrounding properties. It assumes that the odor quality air pollution and standards will be observed on the site if the site is 300 feet from occupied buildings, if there is a specific odor control Site plan.21
10. The request must demonstrate that the sludge is "not dangerous". To do this, the application must include an analysis of the levels of heavy metals in sludge. If sludge generator contains heavy metals at concentrations above screening then the application must include a sampling plan and monitoring and to demonstrate that the maximum concentration of heavy metal soil is not exceeded.
11. The application must also include an analysis of the concentration of dioxins in sludge. If sludge generator contains 27 parts per trillion of dioxin, the application must include a statement signed by the generator, the owner and operator recognizing dioxins in sludge to be spread.
The declaration must also include an agreement to the following conditions:
? The site will be tested for dioxin in three months of last scattering the mud.
? If the soil on the site contains 27 parts per trillion of dioxins and animals for human consumption can not be grazed on the site, the crops for human consumption do not can be grown on the site, and act on the site must record this information.
12. The application must also include a sampling: how often and how sludge will be tested for heavy metals and other toxins.22
13. The sludge will be released to a minimum 15 inches above surface of groundwater. Food crops grown on the site with harvested parts that touch the ground Will Not be harvested for 14 months after the last sludge application.
14. If the sludge remains on the ground for four months or more before being incorporated into the soil, food crops that grow below the soil can not be harvested for at least 20 months after the last sludge application.
15. Food crops, feed crops and fiber crops grown on the site, but have not harvested parts that could affect sludge can not be harvested for at least 30 days after the last sludge application.
16. Interior animals are not allowed to graze on the land for at least 30 days after the last sludge application.
17. Turf grown on the site may not be harvested One year after the last sludge
application.
18. The application shall include site plans, including a topographical map, a drawing of the site, a tax card; soil map (from U.S. Department of Agriculture); sand and gravel aquifer map and a map of flood zones.
19. The sketch the site should include all the setbacks and buffers that will be integrated, and the location of the site and adjoining roads, wells and buildings. Topographic maps are used to determine the slopes on the site. Soil, sand and gravel aquifer, and flood hazard maps are used to determine if the site appropriate, in a regulatory sense, for spreading sludge activities.23
14. Conclusion and recommendation
14.1. Policy Recommendation
? Prohibit sludge containing industrial waste land applied. The best way to ensure that our rural lands are protected from industrial contamination is to prohibit the use of sludge that contains these toxins.
? Require land spreading of sludge to undergo a method of reducing agents Strict pathogens available. Sludge with viruses, bacteria and parasites in relation to background levels should not be land applied.
? Expand and enhancing test parameters of the sludge. Sludge should be tested more often for several contaminants. To better protect public health and the environment, allowable levels of pollutants should be guided not only by the toxicology, but also by natural background levels.
? Allow municipalities to enact ordinances that are stricter than the state by a town meeting or vote in the city. People who are most affected by the sludge sites are local residents. It is important that residents have a voice when it comes to decisions that affect their community.
? Provide maintenance long-term site sludge. sludge generators should be responsible for testing the pH of all sludge application sites, whether active or closed and cover the cost of lime (or other changes) to maintain the pH of the ground safely. All things great volume of sludge must be registered the acts so that future buyers are aware of the prior use of the property.
15.2. Recommendation for municipalities
• The sludge is a particularly important issue for municipalities to oversee: there are local residents who have most to lose threat of sludge.
• In municipalities which house an installation of wastewater treatment, local residents, city officials and managers installation can work together to implement the above recommendations statewide locally.
• All cities have the power to prohibit the use of sludge or sludge materials (like compost) on municipal property.
• Municipalities can also introduce control orders strict application of sludge. Although the state preempts local control over the establishment of strict standards, There are several ways cities can discourage the spreading of sludge.
15.3. What citizen can relate to?
Citizens can protect themselves and protect their communities against the dangers of sludge being actively engaged in reform of the sludge. Depending on the needs of the community, citizens can reform the rules of the sludge to involve city officials, local and state public health and environmental groups.
References
1. Dean and Suess (1995). Toxic Sludge Is Good For You!, Center for Media and Democracy. Published by Common Courage Press, Monroe, ME. p. 101-107.
2. www.vpirg.org, On the ground, spreading toxic sludge in Vermont, Vermont Group Public Interest Research, VPIRG, 64 Main Street, Montpelier, VT 05602. (802) 223-5221.
3. vpirg@vpirg.org. 7-9.
4. www.vpirg.org, Conversations with representatives of DEP and the staff of Portland Water District
5. vpirg@vpirg.org On the ground, spreading toxic sludge in Vermont, Vermont Public Interest Research Group, VPIRG, 64 Main Street, Montpelier, VT 0560. (802) 223-5221. 35-36
6. Maine solid chapters Regulations Waste Management 419, 400, 405, and Appendix A of Chapter 418, and repealed Chapter 567, Protection Department Environment, Office of Solid Waste Management, 17 State House Station, Augusta, ME 04333-0017. Chapter 419, 17.
7. Harrison, Ellen Z. et al, (1999) The Case for Caution, Recommendations for land application of sewage sludge and an evaluation of the EPA rules in Part 503 sludge, Institute Cornell Waste Management, Centre for Environment, Cornell University, Ithaca, NY 14853. February.
8. www.vpirg.org, vpirg@vpirg.org On the ground, spreading toxic sludge in Vermont, Vermont Group Public Interest Research, VPIRG, 64 Main Street, Montpelier, VT 05602. (802) 223-5221. 12-14.
9. www.essential.org / cchw America's Choice Children's Health or the profit of enterprise, Center for Health, Environment, and Justice, PO Box 6806, Falls Church, VA 22040 703.237.2249, 546
10. Gibbs, Lois Marie et al. (1995) Dying from dioxin: a citizen's guide to reclaiming our Health and reconstruction of democracy. South End Press, Boston .. p. 25
11. vpirg@vpirg.org 10-11.
12. Scott, Laura, et al. (1998) The formation of sludge New Hampshire. Responses to the local town and city officials in New Hampshire. New Hampshire Sierra Club. "The application of biosolids in wastewater Maine. "Maine Wastewater Control Association brochure.
13. Lewis, David L., et al. Increased susceptibility to infection from exposure to gases emitted by sewage sludge: A Case Study, Departments of Marine Science, engineering and biological agriculture, and microbiology Medicine, University of Georgia, Athens, GA 30602, Bioset, Inc., 13700 Veterans Memorial, Ste. 385, Houston, TX, 77014. (Conclusion)
14. Tuohy, John (2000) "State probe mistakenly followed the path of the bike ride to a bee sting," USA Today, July 13. 20. Statement Joanne Marshall
15. www.essential.org / cchw. "A comparison of heavy metals in sewage sludge, soil, and regulations applicable
16. cchw@essential.org Standards ", 10/10/2000 details Maine Department of Environmental Protection. 47
17. Maine solid chapters Regulations Waste Management 419, 400, 405, and Appendix A of Chapter 418, and repealed Chapter 567, Department of Environmental Protection, Office of Solid Waste, 17 State House Station, Augusta, ME 04333-0017. Chapter 2, 21-22.
18. Standards, "10/10/2000 details Maine Department of Environmental Protection.
19. State management Maine Solid Waste Regulations Chapters 419, 400, 405, and Appendix A of Chapter 418, and repealed Chapter 567, Department of Environmental Protection, Office of Solid Waste Management, 17 State House Station, Augusta, ME 04333-0017. Chapter 419, 7-10.
20. Maine solid chapters Management Regulation waste 419, 400, 405, and Appendix A of Chapter 418, and repealed Chapter 567, Department of Environmental Protection, Bureau of Waste Management Solid 17 State House Station, Augusta, ME 04333-0017. Chapter 419, 26.
21. Maine Solid Waste Management Regulations A, Chapters 419, 400, 405, and Annex Chapter 418, and repealed Chapter 567, Department of Environmental Protection, Office of Solid Waste Management, 17 State House Station, Augusta, ME 04333-0017. Chapter 419, 7-10 and 26.
22. Maine solid chapters Regulations Waste Management 419, 400, 405, and Appendix A of Chapter 418, and repealed Chapter 567, Department of Environmental Protection, Office of Solid Waste Management, 17 State House Station, Augusta, ME 04333-0017. Chapter 400, 28.
23. Maine Solid Waste Management Regulations A, Chapters 419, 400, 405, and annex of the Chapter 418, and repealed Chapter 567, Department of Environmental Protection, Office of Solid Waste Management, 17 State House Station, Augusta, ME 04333-0017. Chapter 419, 26-27.
About the Author
Md. Wasim Aktar is a Senior Research Fellow in Export Testing Laboratory, APEDA, B.C.K.V., Mohanpur,West Bengal, Pin-741252,India. He is expert in pesticide residue analysis using GC-MS and LC-MS from different environmental samples. He is an Agriculture Graduate and obtained his M.Sc. degree in Agricultural Chemicals from B.C.K.V. He is now doing his Ph.D. work in the same university under the deptt. of Agricultural Chemicals.
Extreme Biohazard! Anyone else concerned about this??
http://news.yahoo.com/s/ap/20071002/ap_on_go_co/mishandling_germs; _ylt = AuQ5.ovLncjktV8tIlj_Uy8DW7oF NOT science fiction! And two of those incidents were here in the Washington area. Not all laboratory technicians supposed to be trained in additional security measures super-duper? WTF?
Yes it is scary things. And besides that, they infect animals which they morally should not do first. No wonder that these animals go mad and scratch and bite them and cannibalize each other scratches leaving infected material in all directions. Karma people, see the report.
Bio Hazard / Resident Evil 2 Chris Extreme Battle LV.3 part 2
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