What is zero direct discharge of sewage? In simple terms, the wastewater generated from production and daily life is treated to meet the standards before being discharged into the external environment. Despite this, there is still a situation where sewage is discharged directly, which has caused serious pollution to the water environment. So, may I ask how you manage to achieve zero direct discharge of sewage?
In the process of practice, “zero direct discharge of sewage” is composed of two projects: sewage interception sodium pipes and sewage treatment. The function of the sodium pipe for sewage interception is to eliminate black and odorous water as the fundamental solution, and the purpose of sewage treatment is to control the source of sewage interception. Of course, it should also be noted that in some cities, after the black and odorous rivers were renovated, the original rainwater and sewage mixing points were all cut off. Although rainwater is diverted, problems can still be identified, especially in cases where residential areas are concentrated and underground pipelines are old. Once the rainfall increases, the drainage pipes cannot transport the water in time and the sewage cannot be drained away in time. As a result, it starts to overflow everywhere, which will cause serious pollution to water bodies and soil.
In addition, the drainage outlets along some lakes should be excluded one by one. According to the construction situation of the surrounding pipeline network, they should be classified strictly in accordance with the relevant guidelines. If it is a sewage discharge outlet under the diversion system, it should be renovated and connected to the current municipal sewage network, or a transfer and connection should be carried out, or sewage emergency treatment facilities should be set up, and then connected to the newly built sewage pipeline. If it is a separate rainwater discharge outlet, at this time, the staff need to combine the load status of the initial rainwater pollution and the overflow pollution situation, etc., and carry out the work by setting up sewage purification facilities or rainwater storage tanks at the end of the pipe channel. After the rain stops, the stored rainwater and sewage are transmitted to the sewage treatment plant through the pipeline network for corresponding treatment and monitoring.
Really, it’s very important to achieve “zero direct discharge of sewage”! Do a good job in the relevant sewage treatment work to ensure it meets the standards. Of course, throughout the entire process, the Online Water Quality Monitoring work can be said to be a very important link, and its main purpose is to monitor whether all the overall indicators of the water quality are qualified.
