What is sewage sludge treatment?

Question 1: What is the use of sludge from sewage treatment plants? Sludge treatment and final disposal: mainly including concentration, digestion, dehydration, composting or domestic landfill. There are mechanical concentration or gravity concentration, and the subsequent digestion is usually anaerobic mesophilic digestion, which is anaerobic technology. Biogas produced by digestion can be used as energy for combustion or power generation, or as chemical products. The sludge produced by digestion has stable properties and high fertilizer efficiency. After dehydration, the volume is reduced and shaped into a cake, which is beneficial to transportation. In order to further improve the sanitary quality of sludge, sludge can also be composted manually or mechanically. Compost sludge is a good soil improver. Sludge with excessive heavy metal content should be treated carefully after dehydration, and generally needs to be buried and sealed.

Question 2: Baike. Baidu/View/641843 # 3 Sludge treatment process of sewage treatment plant.

The above is Baidu sewage treatment encyclopedia, which is very detailed and professional.

Question 3: There are sewage treatment and sludge treatment in water supply and drainage treatment. What is the difference between sewage and sludge? Usually in the process of sewage treatment, solid particles in sewage will form sludge, so sludge should also be treated harmlessly.

Question 4: What is the purpose and significance of sludge treatment? Sludge is the general name of all kinds of sediments and floating objects produced by different treatment processes in water supply and sewage treatment. The composition and properties of sludge mainly depend on the composition, properties and treatment process that cannot be treated. According to different classification standards, sludge has many classification methods, which are briefly described as follows. (1) According to the source of sludge, it can be roughly divided into three types: water supply sludge, domestic sewage sludge and industrial wastewater sludge. (2) According to the process of separating sludge from water, it can be divided into precipitation sludge (including physical precipitation sludge, coagulation sludge and chemical sludge) and biological treatment sludge (referring to sludge produced in the secondary treatment of sewage). Most of the sludge in modern sewage treatment plants is a mixture of precipitated sludge and biological treatment sludge. (3) According to the composition and properties of sludge, it can be divided into organic sludge and inorganic sludge. Organic sludge with organic matter as the main component can be called sludge for short. Organic sludge is hydrophilic sludge. Domestic sludge or mixed sludge belongs to organic sludge. Inorganic sludge with inorganic substances as the main component is often called sediment. Sediments in the grit chamber for water treatment and physical and chemical treatment of some industrial wastewater belong to sediments, and inorganic sludge is generally hydrophobic sludge. (4) According to the classification and naming of sludge in different treatment stages, it can be divided into raw sludge, concentrated sludge, digested sludge, dehydrated and dried sludge, dried sludge and sludge incineration ash. This method is the most commonly used sludge classification method. The main purposes of sludge treatment are as follows. (1) Reduce the moisture to reduce the volume, which is convenient for the transportation and storage of sludge and various treatment and disposal processes. (2) Eliminate organic substances, pathogenic bacteria and other toxic and harmful substances that give off odor, cause diseases and pollute the environment, and make the sludge sanitary and stable. (3) Improve the composition and properties of sludge, so as to be convenient for application or easy to recycle energy and resources. With the popularization and development of sewage treatment technology, the amount of sludge is increasing, and the types and properties are more complicated. Toxic and harmful substances in wastewater are often concentrated in sludge, so sludge is one of the most serious factors affecting the environment, so we must pay attention to the treatment and disposal of sludge.

Question 5: How is the sewage sludge treatment technology now? With the development of science and technology and social progress, China's sewage sludge treatment technology has made new progress, and new products and technologies for sewage sludge treatment have emerged one after another. Typical technologies of sewage treatment include a large number of advanced products such as "directed biological aerated filter" and "microbial generator".

The diversion biological aerated filter fully draws lessons from eight design methods, such as biological aerated filter method, contact oxidation method, biofilm method, intermittent aeration method, manual rapid filtration method, precipitation separation method, nitrification and denitrification method and water supply rapid filtration method, and develops a new sewage treatment process and technology by combining two-stage or three-stage sewage treatment process. The diversion biological aerated filter has been used in Beijing, Shandong, Hebei, Guizhou, Shanxi, Sichuan, Inner Mongolia, Heilongjiang, Jiangsu, Jilin, Henan, Hubei, Tianjin, Xinjiang and other places in China, involving sewage treatment in the fields of life, hospital, chemical industry, slaughter, food, flax, alcohol, pharmacy and pickled mustard tuber. A large number of applications have proved that the CODcr of effluent quality is generally below 20mg/L, and the lowest is 5.95 mg/L; Generally, BOD5 is below 10mg/L, and the lowest is 3.50mg/L.: SS is generally below 20mg/L, and the lowest is 6.55 mg/l.

The diversion biological aerated filter enables sewage to be aerated twice, precipitated twice and filtered twice in the same treatment tank, which solves the technological process that other sewage treatment needs four tanks to complete, especially in the case of continuous water inflow, intermittent aeration and activated sludge reflux are realized, and the whole operation does not idle. Its advantages are more prominent than traditional treatment methods, and the treatment effect is particularly remarkable. In August 2009, it was listed as an "innovative project" by the Ministry of Science and Technology; In June+February, 2009, the product was listed in the Catalogue of Environmental Protection Technologies Encouraged by the State by the Ministry of Environmental Protection. 20 10 was recognized as "national key new product" by Ministry of Science and Technology, Ministry of Environmental Protection, Ministry of Commerce and AQSIQ in May. 20 12 was listed as "environmental protection technology encouraged by the state" by the Ministry of Environmental Protection in July.

Based on the principles of biological purification and fluid mechanics, the microbial generator effectively removes soluble organic matter and some insoluble organic matter from wastewater by using microorganisms in the process of life activities. It has advanced technology, stable performance and safe use, and is especially suitable for various wastewater (sewage) treatment and micro-pollution treatment. It has the following advantages:

1. The equipment adopts three-stage generation, alternate operation, step-by-step derivation and logarithmic growth technology, so that the microbial density generated by the generator can reach 1.8× 1020CFU/ml. After the high-density microorganisms are released into the biochemical pool, the biomass in the pool can be rapidly increased to more than 2.0×104 mg/L.

2. This equipment is an ideal biological sewage treatment equipment, which can produce different kinds, different bacteria, different temperatures and different sewage treatment needs according to different types, different properties and different environments, and is especially suitable for urban domestic sewage, rural domestic sewage, medical sewage, industrial wastewater, livestock and poultry breeding wastewater, high-salt wastewater, high-ammonia nitrogen wastewater, toxic and harmful wastewater, heavy metal wastewater, landfill leachate and other wastes (sewage)

The equipment can also be directly used with old sewage treatment projects such as contact oxidation method, AB method, A/O method, oxidation ditch and SBR. And can realize various purposes such as sewage treatment upgrading and capacity expansion, sludge reduction, nitrogen and phosphorus removal, reclaimed water reuse and the like. Do not change the sewage treatment process and civil engineering. The equipment can also be used in landscape, rivers, lakes, rivers, salt lakes, bays, land and other fields to eliminate micro-pollution and protect the public environment.

3. The microbial generator produces high-density dominant microbial flora, which can quickly eat up pollutants and sludge in sewage without peculiar smell. It does not need sludge dehydrator, sludge conveyor, mud cake transporter, waste gas treatment equipment and high-power blast aeration equipment. Compared with the traditional method, the energy consumption of activated sludge method is 1/8, and the equipment investment can be saved by 70%. It can also be operated in shallow pools to treat sewage.

4. The high-density microbial flora generated by this equipment can rapidly reduce the biological oxygen consumption (BOD), chemical oxygen demand (COD) and suspended solids (TSS) in sewage after it enters the treatment tank through jet, and it is very powerful ... ":>

Question 6: What are the requirements for sludge disposal? It refers to the disposal process of treated sludge, including land use, landfill and comprehensive utilization of building materials. The utilization of sludge land should conform to the national and local standards and regulations. Sludge land use mainly includes land improvement and landscaping. When the sludge is used for landscaping, it should meet the requirements of CJ248 and related standards. Sludge must be stabilized and treated harmlessly first. When sludge is used for land improvement in saline-alkali land, desertified land and abandoned mines, the sludge shall conform to the Regulation of Land Improvement for Sludge Disposal in Urban Sewage Treatment Plants (CJ/T 29 1). And should be based on local conditions, environmental impact assessment, approved by the relevant competent departments before implementation. When sludge is used in agriculture, it must be stabilized and treated harmlessly, and it must meet the current national and local agricultural standards and regulations such as "Agricultural Sludge Pollutant Control Standard" (GB4284). Sludge landfill. Sludge that does not have the conditions for comprehensive utilization of land and building materials can be disposed of by landfill. The state will gradually restrict the disposal of sludge without inorganic treatment in landfill sites. Sludge landfill should meet the requirements of Mixed Landfill Sludge for Sludge Disposal in Urban Sewage Treatment Plants (CJ/T 249); Sludge before landfill should be stabilized; The transverse shear strength should be greater than 25kN/m2；; ; The landfill should have a biogas utilization system, and the leachate can meet the discharge standard.

Sludge treatment: When landscaping and agricultural utilization are disposal methods, anaerobic digestion or thermophilic aerobic fermentation (composting) is encouraged to treat sludge. Sludge can be treated by high-temperature aerobic fermentation and lime stabilization, or modified by adding fly ash and aging garbage. The moisture content of sludge after thermophilic aerobic fermentation should be lower than 40%. When sludge is treated by comprehensive utilization of building materials, sludge thermal drying and sludge incineration can be used. When sludge is treated by comprehensive utilization of building materials, sludge thermal drying and sludge incineration can be used. The flue gas generated by sludge incineration should be treated and meet the relevant provisions of the Pollution Control Standard for Domestic Waste Incineration (GB 18485). Slag generated by sludge incineration and fly ash collected by dust removal equipment should be collected, stored and transported separately. Encourage the comprehensive utilization of qualified slag; Fly ash should be properly disposed of after identification.

Sludge transportation and storage: the whole process of transportation should be monitored and managed to prevent secondary environmental pollution caused by exposure, leakage or dripping; It is forbidden to dump or steal sludge at will. Sludge transfer and storage. If sludge transfer stations and storage facilities need to be set up, they can be constructed and used according to the Standard for Setting Urban Environmental Sanitation Facilities (CJJ27) and approved by relevant competent departments.

Safe operation and supervision of sludge treatment and disposal: urban sewage treatment plants, sludge transport units and sludge receiving units should establish a sludge transfer bill system, and regularly report the recorded bill results to relevant local departments. Business units shall establish a complete system of detection, recording, filing and reporting, track, record and report the whereabouts, uses and dosage of sludge and its by-products after treatment and disposal, and keep relevant information for at least 5 years. Landfill operation units shall, in accordance with the relevant national standards and norms, regularly monitor the background values of landfill sludge, water, gas and soil and the operational impact.

Question 7: What qualifications are required for sludge treatment? I am a professional in sludge treatment. It depends on what kind of sludge you want to treat. The most important qualification is the hazardous waste business license. If the sludge contains copper, it must have the qualification of hazardous waste HW22 (copper-containing waste).

Question 8: What is the cost of sludge treatment in sewage plant? How much is sludge drying?

Sludge with water content of 80% is about 120 yuan/ton.

Sludge with water content of 60% is about 160 yuan/ton.

Sludge with water content of 50% is about 200 yuan/ton.

About 65,438+020-65,438+080 yuan/ton is used for landfill.

Transportation and incineration are about 200-240 yuan/ton.

Question 9: What does it mean that the sludge treatment capacity in sewage treatment is 1.2tds/h? 1.2 tons of dry sludge/hour?

Question 10: How to treat the sludge from the sewage treatment plant? At present, our company provides a complete set of sludge treatment solutions. The dehydration rate reaches 50%. The operating cost per ton of sludge is 40~50 yuan. You can contact me if you are interested. thank you