Wastewater discharge

It depends on the industry; for example, there is GB 8978-1996, the Comprehensive Wastewater Discharge Standard, and GB 18918-2002, the Pollutant Discharge Standards for Urban Sewage Treatment Plants. In addition, industries such as the papermaking sector and hospitals also have their own wastewater discharge standards

It depends on the requirements of the receiving water body; generally, it meets the second-level standards for water pollution discharge!

Depending on the water body into which the wastewater is discharged, wastewater discharged into GB3838 Class III waters (with the designated protected areas and swimming zones excluded) and into Class II sea areas as specified in GB3097 is subject to Grade 1 standards. Wastewater discharged into Class IV and V waters as specified in GB 3838, as well as wastewater discharged into Class III sea areas as specified in GB 3097, shall comply with the secondary standard. Wastewater discharged into the municipal sewerage systems equipped with secondary wastewater treatment plants is subject to tertiary standards. In the protected areas designated in Class I and II waters as well as Class III waters, and in Class I marine areas as specified in GB3097, the construction of new sewage outfalls is prohibited. Existing sewage outfalls must be subject to total pollutant control in accordance with the functional requirements of the water bodies, so as to ensure that the water quality of these water bodies meets the standards appropriate for their intended uses. In accordance with the principle that **comprehensive emission standards and industry-specific emission standards are not applied simultaneously**, the papermaking industry follows the \"Emission Standards for Water Pollutants in the Papermaking Industry (GB3544-92)\", ships follow the \"Emission Standards for Ship Pollutants (GB3552-83)\\", the shipbuilding industry adheres to the \"Emission Standards for Pollutants in the Shipbuilding Industry (GB4286-84)\\", the offshore oil exploration industry complies with the \"Emission Standards for Oily Wastewater from Offshore Oil Exploration (GB4914-85)\\", the textile dyeing and finishing industry follows the \"Emission Standards for Water Pollutants in the Textile Dyeing and Finishing Industry (GB4287-92)\\", the meat processing industry uses the \"Emission Standards for Water Pollutants in the Meat Processing Industry (GB13457-92)\\", the synthetic ammonia industry adheres to the \"Emission Standards for Water Pollutants in the Synthetic Ammonia Industry (GB13458-92)\\", the steel industry follows the \"Emission Standards for Water Pollutants in the Steel Industry (GB13456-92)\\", the use of aerospace propellants is regulated by the \"Emission Standards for Water Pollutants from Aerospace Propellants (GB14374-93)\\", the arms manufacturing industry complies with the \"Emission Standards for Water Pollutants in the Arms Manufacturing Industry (GB14470.1～14470.3-93 and GB4274～4279-84)\\", the phosphate fertilizer industry follows the \"Emission Standards for Water Pollutants in the Phosphate Fertilizer Industry (GB15580-95)\\", and the caustic soda and polyvinyl chloride industries adhere to the \"Emission Standards for Water Pollutants in the Caustic Soda and Polyvinyl Chloride Industries (GB15581-95)\“. At the same time, some areas may establish local standards that set limits on wastewater discharge; for example, in the area around Dianchi Lake, where pollution is severe, companies that cannot send their wastewater to sewage treatment plants must meet the Class A standard for urban sewage treatment plants

There are many standards for this; what was mentioned upstairs is already quite detailed

The industry standards on the 4th floor are more detailed. Wastewater discharge standards are related to several factors: First is the destination of the discharged water, that is, the receiving water body. If it is rivers or lakes, then undoubtedly the first-level standards applicable to various industries are used; in most cases, the first-level standards of the \"Comprehensive Wastewater Discharge Standards\" or Standard A outlined in the \"Urban Sewage Treatment Plants...\" are applied. However, if the water is discharged into urban sewage treatment plants, then second-level or third-level discharge standards may apply ； Secondly, it is related to the industry; different industries have distinct characteristics in their wastewater, and accordingly, their emission standards also vary ； Thirdly, it is related to the local environmental protection policies in place; if the local environmental requirements are high, then the local emission standards applied are often stricter than the **standards.

There are industry standards, but how many companies can meet the emission requirements? I’ve seen companies insert online detectors directly into clean water, with environmental protection agencies coming around on schedule every month to collect money! Blatant fraud, blatant dereliction of duty! It’s useless to complain to the ordinary people!

People these days only care about making money and ignore environmental protection; it’s hard to know how many more years the Earth will be able to survive

There are mainly three indicators: COD, BOD, and SS, which refer to chemical oxygen demand, biochemical oxygen demand, and suspended solids content~~These depend on the location where the waste is discharged……

The details upstairs are very thorough; it definitely meets **the current standards!

It is related to the quality of the water being received, but regardless of that quality, there are corresponding **standards**, and it’s always a good idea to understand those standards first.