How to classify the discharge level of sewage treatment system

Sewage refers to water sources containing a large number of bacteria and impurities. Generally, sewage can only be discharged after being treated by a sewage treatment system. When we treat wastewater, we need to classify it according to its discharge level. At present, some people may not be particularly familiar with this level. Today, I will introduce to you the discharge level of the sewage treatment system. How to classify the discharge level of the sewage treatment system 1. The sewage discharged into the GB3838 Class III water area (except for the designated protection area and swimming area) and the GB3097 Class II sea area shall implement the Class I standard. 2. Sewage discharged into Class IV and Class V waters in GB3838 and Class III sea areas in GB3097 shall implement Class II standards. 3. The sewage discharged into the urban drainage system with the secondary sewage treatment plant shall implement the tertiary standard. 4. For sewage discharged into urban drainage systems without secondary sewage treatment plants, relevant regulations need to be implemented according to the environmental function requirements of the water area of ​​the drainage system. 5. In GB3838, it is stipulated in Class I and Class II waters and protected areas designated in Class III waters, and in Class I sea areas in GB3097, it is strictly forbidden to build new sewage outlets. Existing sewage outlets must implement the total amount of relevant pollutants in accordance with the functional requirements of the water body to ensure that Discharged sewage meets the water quality standards for specified purposes. Classification of sewage pollutants Generally, we can divide the discharged water pollutants into two types according to their properties and control methods. 1. If there is no distinction between the industry and the way of sewage discharge, and the functional category of the water body, it is necessary to sample in the workshop environment or the discharge outlet of the workshop treatment facility, and the concentration of pollutants allowed to be discharged must meet the standard requirements specified in this standard. 2. The second pollutant needs to be sampled at the discharge outlet of the pollutant discharge unit, and its allowable discharge concentration must meet the requirements of this standard. The discharge level of the sewage treatment system is generally divided into five categories. When the sewage treated by the sewage treatment system is discharged, it must meet the standard discharge level.