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◉ Introduction to Sludge Testing
Sludge refers to the sediment, particulate matter and floating matter produced when wastewater is treated by physical, chemical, physical-chemical and biological methods. Sludge generally refers to a thick substance between liquid and solid, which can be pumped, but it is difficult to separate solid-liquid by sedimentation. The concentration of suspended solids is generally 1% to 10%, and the concentration below this is often called mud.
Sludge detection is to sample and test the sludge to determine the type and concentration of pollutants in the sludge.
Sludge identification is to identify the hazardous characteristics of sludge based on the results of sludge testing, and identify whether the sludge belongs to general solid waste or hazardous waste.
◉ Sludge Classification
(1) According to its source, it can be divided into:
Municipal sludge mainly refers to sludge from sewage plants, which is the largest type of sludge. In addition, sludge from waterworks also comes from municipal facilities and can be classified in this category.
Pipe network sludge, sludge from drainage collection systems.
The silt of rivers and lakes comes from the silt of rivers and lakes.
Industrial sludge, a mixture of solids and water, oil, chemical pollution, and organic matter from various industrial processes.
(2) According to different water treatment methods, it can be divided into:
Primary sludge: refers to the sediment produced during the primary treatment of sewage
Activated sludge: refers to the sediment produced in the secondary sedimentation tank of the activated sludge treatment process
Humic sludge: refers to the sediment produced in the secondary sedimentation tank in the sewage treatment process of the biofilm method (such as biological filter, biological turntable, part of the biological contact oxidation tank, etc.).
Chemical sludge: refers to the sludge produced after chemically enhanced primary treatment (or tertiary treatment).
Sedimentation sludge: sludge retained in the primary sedimentation tank, including physical sedimentation sludge, coagulation sedimentation sludge, and chemical sedimentation sludge.
◉ Service Area
(1) Sludge detection;
(2) Identification of hazardous characteristics of sludge;
◉ Test Items
Physical and chemical index detection: odor concentration, chloride ion, cartridge calorific value, low calorific value, high calorific value, particle size, sand content, bulk density, etc.
Industrial Analysis: Moisture, Volatile, Ash, Fixed Carbon
Elemental analysis: total sulfur, carbon, hydrogen, nitrogen, oxygen, ammonia, sulfur, etc., silicon dioxide, aluminum oxide, iron oxide, calcium oxide, magnesium oxide, titanium oxide, potassium oxide, sodium oxide, ash components Detection of manganese dioxide, etc.
Ash fusion detection: deformation temperature, softening temperature, hemisphere temperature, flow temperature, etc.
Pollutant detection: total copper, total zinc, total cadmium, total lead, total chromium, total mercury, total plating, total barium, total nickel, total silver, total arsenic, total selenium, alkyl mercury, fluoride, cyanide, etc.
Biological detection: total number of bacteria, activated sludge bacteria, microbial population genome, etc.
◉ Related Standards
"Urban Sewage Treatment Plant Sludge Inspection Method" CJ/T 221-2005
"Urban Sewage Treatment Plant Sludge Disposal - Agricultural Mud" CJ/T 309-2009
"Pollutant Discharge Standards for Urban Sewage Treatment Plants" GB 18918-2006
"Method for the determination of 26 elements such as copper, nickel, lead, zinc, cadmium, chromium and other elements in sludge from industrial waste liquid treatment" GB/T 36690-2018
"Method of Disposal of Electroplating Sludge Reduction" GB/T 39301-2020
"Plastics - Determination of the final anaerobic biodegradation rate of materials in controlled sludge digestion systems using methods for measuring biogas released" GB/T 38737-2020
"Agricultural Sludge Pollutant Control Standard" GB 4284-2018
"Urban Sewage Treatment Plant Sludge Disposal Woodland Mud" CJ/T 362-2011
"Standard for Pollutant Control in Agricultural Sludge" GB 4284-1984
"Urban Sewage Treatment Plant Sludge Disposal - Requirements for Sludge for Landscaping" GB/T 23486-2009
"Urban Sewage Treatment Plant Sludge Disposal - Mud Quality Requirements for Mixed Landfill" GB/T 23485-2009
"Urban Sewage Treatment Plant Sludge Disposal - Mud Quality Requirements for Land Improvement" GB/T 24600-2009
"Urban Sewage Treatment Plant Sludge Disposal - Mud for Brick Making" GB/T 25031-2010
◉ Compliance Services
As a professional third-party testing and certification service organization, Jiayu Testing has qualifications such as CMA, CNAS, and occupational health technical service institutions. In the field of environmental testing, it currently has more than 1000 CMA testing parameters, covering water and wastewater, air and exhaust gas, soil and sediment, noise and vibration, and solid waste toxicity identification. The laboratory is built and managed strictly in accordance with standards, equipped with advanced instruments and equipment, and has a professional technical team with superb skills. It has rich industry service experience and strong testing technology capabilities. Based on the principles of objectivity and fairness, it provides authoritative testing reports with legal effect to the society, and provides full chain environmental risk management support for enterprises and regulatory departments. Welcome to contact us at 400-9269-886!
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