What is the responsibility of the local testing agency for wastewater testing?

The testing scope of each testing institution is different, and wastewater testing can be done as long as the laboratory has obtained relevant qualifications. From the perspective of the whole country, Inger technology has done more, such as metallurgical wastewater, papermaking wastewater, textile and leather wastewater, and undertakes the detection of industrial wastewater and domestic sewage in most parts of the country.

Hebei Hongshun Safety Technology Service was established in June 2012, covering an area of more than 1,600 square meters. The company is located in No. 239, Xiangjiang Road, Development Zone, Shijiazhuang City, Hebei Province, with a registered capital of 10 million yuan, and is the most influential third-party testing institution in Hebei Province approved by the Hebei Provincial Bureau of Quality and Technical Supervision, the Fire Bureau of the Hebei Provincial Public Security Department and the Hebei Meteorological Bureau. In terms of the environment, the main detection scope includes:

Ambient air, pollution source exhaust gas, gas station exhaust gas**, surface water, groundwater, drinking water, industrial wastewater, urban sewage, agricultural soil, garden soil, construction soil, industrial soil and solid waste, food and drink fume detection and other environmental protection testing items that affect the environment and environmental protection, as well as noise and vibration of industrial enterprises and social public places. In terms of measurement and calibration, it can provide testing and calibration of measuring instruments and instruments in the fields of thermal, mechanical, electromagnetic, time and frequency, chemistry, etc., and can provide scientific and efficient testing and calibration services for testing and inspection laboratories such as construction, transportation, food, environment, and occupational health. Hebei Hongshun is a set of fire detection (level 1), fire construction (level 1), maintenance (level 1) architectural design (class B), and lightning protection device testing (class A), environmental monitoring, testing, environmental impact assessment technical consultation, environmental impact assessment and equipment measurement and calibration, environmental protection engineering design as one of the one-stop comprehensive service professional institutions, so far is the only one in Hebei Province at the same time with fire protection, lightning protection, environmental monitoring, testing, measurement and calibration qualifications of the third-party professional testing institutions!

1. Suspension.

Floats. Be. It is made of solid and insoluble substances in water.

The amount of suspended solids contained in the water per unit volume of pollution water is shown in the table du(mg l).

2. Organic concentration in wastewater: 1) Biochemical oxygen demand, referred to as biochemical oxygen demand, expressed by BOD, indicates the amount of oxygen required for the decomposition of organic pollutants in sewage by microorganisms, expressed in mg L or parts per million (ppm), the higher the BOD, the more aerobic organic matter in the water, and the greater the degree of water pollution. 2) Chemical oxygen demand (COD), which indicates the amount of oxygen required when oxidizing reducing pollutants in water with chemical oxidants, expressed in mg L or parts per million (ppm), the higher the COD, the more organic matter, and the commonly used oxidants are potassium dichromate or potassium permanganate.

and 3) total organic carbon (TOC) and total oxygen demand (TOD).

3. The pH value is an important indicator for testing water, and the pH value of domestic sewage is that industrial sewage is more complex and changes greatly.

4. Sewage bacterial pollution index: In the process of water treatment, two indicators are used to indicate the degree of bacterial contamination of the water body: 1) the total number of bacteria (miscellaneous bacteria) in 1 ml of water; 2) How much E. coli is in the water. Edema contains E. coli, indicating that the water has been contaminated.

5. Toxic indicators in sewage. China has set a standard for "the maximum allowable concentration of toxic substances in surface water". In addition, there is temperature, color, concentration of radioactive substances, etc.

pH, five-day biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total nitrogen,

Total phosphorus, anionic surfactant, total cyanide and other related standard items.

fecal coliforms, total BAI residual chlorine, DU chemical oxygen demand, DAO 5-day biochemical oxygen demand

Suspended solids, ammonia nitrogen, animals and plants.

Oil, petroleum, anionic surfactants

Color, pH, total mercury, volatile phenol, total cyanide, total cadmium, hexavalent chromium, Salmonella, Shigella, Mycobacterium tuberculosis and other related standard items Total mercury, alkyl mercury, total cadmium, total chromium, hexavalent chromium, total arsenic, total lead, total beryllium, total nickel, pH value, color, suspended solids, five-day biochemical oxygen demand, chemical oxygen demand, petroleum, animal and vegetable oils, volatile phenols, ammonia nitrogen and other related standard items Water temperature, color, easy to sink solids, suspended solids, total dissolved solids, animal and vegetable oils, petroleum, pH value, Five-day biochemical oxygen demand, chemical oxygen demand, ammonia nitrogen, total nitrogen, total phosphorus, anionic surfactant, total cyanide and other related standard items.

(1) Chemical indicators of sensible properties: color, turbidity, odor and taste, visible to the naked eye, daoph, aluminum, iron, manganese, copper, zinc, chlorinated contents, and capacity.

Sulfate, total dissolved solids, total hardness, oxygen consumption, volatile phenols, anionic synthetic detergent toxicological indicators: arsenic, cadmium, chromium, mercury, selenium cyanide, fluoride, nitrate, chloroform, carbon tetrachloride, bromate, formaldehyde, chlorite, chlorate.

2) Microbial indicators: total coliform bacteria, heat-resistant coliforms, Escherichia coli, pathogenic bacteria, total number of colonies.

3) Radioactivity indicators: total radioactivity, total radioactivity.

Summary. Dear, hello, to test the water quality of wastewater, reliable third-party testing institutions are as follows: Qingdao Meister Testing Technology, Xi'an Guolian Quality Testing Technology Co., Ltd.

If you want to test the water quality of wastewater, is there a reliable third-party testing agency?

Dear, hello, testing the water quality of wastewater, reliable third-party towns and testing institutions are as follows: Qingdao Meister Testing Technology, Xi'an Guolian Haokai Quality Royal Bending Detection Technology Co., Ltd.

Waste water refers to the general term for water and runoff rainwater discharged during residents' activities. It includes domestic sewage, industrial wastewater and other non-water such as early rain runoff flowing into drainage pipes and canals, and generally refers to water that cannot be recycled after certain technical treatment or is not purified after being polluted by a first-class celery deficiency. It is also called sewage, the water produced in the process of production and life of a human being, which has lost its use value or cannot be used, and the discharge of wastewater into the environment can cause water pollution.

A: There are many types of sewage, which are divided into the following categories.

Category I: Industrial wastewater Effluent from the manufacture of mining and industrial production activities, including runoff live leachate from industrial or commercial storage and processing, and other wastewater that is not domestic sewage.

Category 2: Domestic sewage: sewage from residential buildings, office buildings, institutions or similar effluents; sanitary sewage; Sewer effluent, including industrial effluent mixed with domestic effluent in sewer systems.

Category III: Commercial Effluent Non-toxic, non-hazardous effluent from commercial facilities and some of its components exceed domestic sewage. Such as catering sewage. Laundry sewage, animal feeding sewage, hair salon sewage, etc.

Category 4: Surface runoff from rain, snow, highway water, water from urban and industrial areas, etc., surface runoff does not seep into the soil, along the streets and land into the groundwater.

Guolian quality inspection environmental testing generally tests the following items for sewage: PH chemical oxygen demand five-day biochemical oxygen demand suspended solids petroleum anionic surfactant ammonia nitrogen total residual chlorine fecal E. coli total phosphorus animal and vegetable oil lead arsenic chromium.

Class 1 emission standard: COD 100mg L, ammonia nitrogen mg L, phosphorus, residual chlorine. These are more common.

The specific depends on the standards given by the local environmental protection department. Individual companies will be more lenient. If the test is small, just send it to the local testing department for testing.

If you have more, you can buy test strips or instruments by yourself, which is more cost-effective.

Generally, COD, BOD, PH, SS, ammonia and oxygen are detected. The testing institutions are mainly the monitoring stations of local environmental protection bureaus at all levels.

Industrial Wastewater Testing Items:

Water Temperature, Odor, Conductivity, Transparency, pH, Total Salt, Color, Turbidity, Suspended Solids, Acidity, Alkalinity, Hexavalent Chromium, Total Mercury, Copper, Zinc, Lead, Cadmium, Nickel, Iron, Manganese, Beryllium, Total Chromium, Potassium, Sodium, Calcium, Magnesium, Total Hardness, Total Arsenic, Selenium, Barium, Molybdenum, Cobalt, Dissolved Oxygen, Ammonia Nitrogen, Nitrite Nitrogen, Nitrate Nitrogen, Sulfate, Total Nitrogen, Total Phosphorus, Chloride, Fluoride, Total Cyanide, Sulfide, Permanganate Index, Biochemical Oxygen Demand, Chemical Oxygen Demand, Volatile phenols, petroleum, animal and vegetable oils, anionic surfactants, benzene, toluene, ethylbenzene, paraxylene, o-xylene, m-xylene, styrene, etc.

Wastewater and sewage need to be tested according to what standard, for example, according to the standard of drinking water, according to the 38 items in Table 1 for testing, the items are: total coliforms, heat-resistant coliforms, Escherichia coli, total number of colonies, arsenic, cadmium, chromium (hexavalent), lead, mercury, selenium, cyanide, fluoride, nitrate, chloroform, carbon tetrachloride, bromate, formaldehyde, chlorite, chlorate, color, turbidity, odor and taste, visible to the naked eye, pH, aluminum, iron, manganese, copper, Zinc, Chloride, Sulfate, Total Dissolved Solids, Total Hardness, Oxygen Consumption, Volatile Phenols, Anionic Synthetic Detergents, Total Radioactivity, Total Radioactivity.

According to the 38 items of drinking water, the cost of testing is about 3000-4000; The testing agency recommends that you find someone who is accredited by CMA for testing, and the test report issued is legally valid and nationally recognized; If it does not have CMA qualifications, the report is not authoritative.

Industrial wastewater testing is mainly a general term for the detection of wastewater, sewage and aquatic organisms discharged from the production process of enterprise factories.

Process wastewater testing includes both production wastewater and production effluent. According to the products and processing objects of industrial enterprises, it can be divided into papermaking wastewater, textile wastewater, tanning wastewater, pesticide wastewater, metallurgical wastewater, oil refining wastewater, etc.

Industrial Wastewater Testing Items:

1. Water temperature, odor, conductivity, transparency, pH value, total salt content, color, turbidity, suspended solids, acidity, alkalinity.

2. Permanganate index, biochemical oxygen demand, chemical oxygen demand, volatile phenols, petroleum, animal and vegetable oils, anionic surfactants, benzene, toluene, ethylbenzene, p-xylene, o-xylene, m-xylene, styrene.

3. Dissolved oxygen, ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, sulfate, total nitrogen, total phosphorus, chloride, fluoride, total cyanide, sulfide.

4. Hexavalent chromium, total mercury, copper, zinc, lead, cadmium, nickel, iron, manganese, beryllium, total chromium, potassium, sodium, calcium, magnesium, total hardness, total arsenic, selenium, barium, molybdenum, cobalt.

Instruments used for the 7 indicators that must be measured in wastewater and sewage treatment:

1. COD tester: determine the water chemical oxygen demand.

The higher the chemical oxygen demand, the more serious the organic pollution in the river water, and if left untreated, many organic pollutants can be adsorbed by the sediment at the bottom of the river and deposited, causing lasting toxic effects on aquatic life in the next few years. When aquatic life dies in large numbers, the ecosystem in the river is destroyed.

2. Ammonia nitrogen tester: rapid quantitative determination of ammonia nitrogen index.

1) The effects of ammonia nitrogen on human health.

Ammonia nitrogen in water can be converted into nitrite under certain conditions, and if drunk for a long time, the nitrite in the water will combine with protein to form nitrosamines, which is a strong carcinogen and extremely bad for human health.

2) The impact of ammonia nitrogen on the ecological environment.

Ammonia nitrogen is mainly free ammonia, which is dozens of times more toxic than ammonium salt, and increases with the enhancement of alkalinity. Ammonia nitrogen toxicity is closely related to the pH value and water temperature of the pool water, in general, the higher the pH value and water temperature, the stronger the toxicity, and the harm to fish is similar to nitrite.

3. Total phosphorus tester: rapid and quantitative determination of total phosphorus index.

If the total phosphorus is too high, it will cause eutrophication of the water body. Eutrophication will affect the water quality of the water body, causing the water to reduce its transparency, making it difficult for sunlight to penetrate the water layer, thus affecting the photosynthesis of plants in the water, and may cause a supersaturated state of dissolved oxygen. The oversaturation of dissolved oxygen and the low amount of dissolved oxygen in the water are harmful to aquatic animals and cause a large number of fish deaths.

At the same time, because of the eutrophication of the water body, a large number of algae with cyanobacteria and green algae as the dominant species grow on the surface of the water body, forming a layer of "green scum", resulting in the harmful gases produced by the decomposition of organic matter accumulated at the bottom under anaerobic conditions and the biotoxins produced by some plankton will also harm fish.

4. Total nitrogen tester: directly display and print the total nitrogen value of the sample.

When the nitrogen and phosphorus substances in the surface water exceed the standard, microorganisms multiply in large quantities, plankton grow vigorously, and eutrophication appears.

5. pH: pH value monitoring in aqueous solution.

6. Suspended solids tester: quickly determine the content of suspended solids in the water body.

Suspended solids in water are the main cause of turbidity. The organic suspended solids in the water body are prone to anaerobic fermentation after deposition, which deteriorates the water quality.

7. BOD tester: determine biochemical oxygen demand.

Pollutants in surface water consume dissolved oxygen in the water during the oxidation process with microorganisms as the medium, and the amount of dissolved oxygen consumed is called biochemical oxygen demand (or biological oxygen consumption, or BOD, in mg L), which indirectly reflects the amount of biodegradable organic matter in the water. It describes the total amount of dissolved oxygen consumed in water when organic matter in water is oxidized and decomposed by microbial biochemical action to make it inorganic or gasified. The higher the value, the more organic pollutants in the water, and the more serious the pollution.