Wastewater includes domestic wastewater, industrial wastewater, and other useless water that flows into drainage pipes and channels due to initial rainfall. It generally refers to water that cannot be recycled after certain technical treatment or that cannot meet certain standards for purification and treatment after primary pollution. Classified by the products and processing objects of industrial enterprises, it can be divided into metallurgical wastewater, papermaking wastewater, metal pickling wastewater, chemical fertilizer wastewater, textile printing and dyeing wastewater, dye wastewater, tannery wastewater, power plant wastewater, and so on

Sewage refers to the general term for the water discharged from production and living activities. Generally speaking, wastewater belongs to a classification of sewage, and the testing items and standards of wastewater can refer to the content and requirements of sewage testing

What are the common wastewater testing projects?

Common detection items include pH, chromaticity (dilution ratio), suspended solids (SS), five day biochemical oxygen demand (BOD), chemical oxygen demand (COD), petroleum, animal and plant oils, volatile phenols, total cyanide, ammonia nitrogen, total phosphorus, total nitrogen, sulfide, chloride, total mercury, total chromium, total cadmium, hexavalent chromium, total arsenic, total lead, total nickel, total silver, total α Radioactivity, total β Radioactivity, etc. (The testing items are for reference only. In the actual testing process, applicable standards should be adopted and testing items should be developed based on the actual situation of the enterprise, industry characteristics, and regional requirements.)

Wastewater testing is mainly a special testing of corresponding pollutants in wastewater, including heavy metal pollutants, harmful chemicals, etc., monitoring them within a certain limit range to prevent damage or harm to the environment after discharge What are the standards for wastewater testing

Wastewater belongs to a category of wastewater, and the wastewater testing standards are consistent with the wastewater testing standards. According to different industries, wastewater testing standards are implemented according to different national industry discharge standards, as follows:

The paper industry follows the "Paper Industry Water Pollutant Discharge Standard (GB3544-92)", ships follow the "Ship Pollutant Discharge Standard (GB3552-83)", and the ship industry follows the "Ship Industry Pollutant Discharge Standard (GB4286-84)", The offshore oil development industry implements the "Emission Standards for Oily Wastewater from Offshore Oil Development Industry (GB4914-85)", the textile dyeing and finishing industry implements the "Emission Standards for Water Pollutants from Textile Dyeing and Finishing Industry (GB4287-92)", the meat processing industry implements the "Emission Standards for Water Pollutants from Meat Processing Industry (GB13457-92)", and the synthetic ammonia industry implements the "Emission Standards for Water Pollutants from Synthetic Ammonia Industry (GB13458-92)", The steel industry implements the "Water Pollutant Discharge Standards for the Steel Industry (GB13456-92)", the use of aerospace propellants follows the "Water Pollutant Discharge Standards for Aerospace Propellants (GB14374-93)", the weapons industry follows the "Water Pollutant Discharge Standards for the Weapons Industry (GB14470.1-14470.3-93 and GB4274-4279-84)", the phosphate fertilizer industry follows the "Water Pollutant Discharge Standards for the Phosphate Fertilizer Industry (GB15580-95)", and caustic soda The polyvinyl chloride industry implements the "Discharge Standards for Water Pollutants in Caustic Soda and Polyvinyl Chloride Industries (GB15581-95)". Except for the industry standards listed above, all other water pollutant emissions shall be executed; Comprehensive Wastewater Discharge Standard (GB 8978-1996)