Sewage outfall is the construction of sewage discharge like water, but these sewage must be monitored and treated to meet the requirements before discharge. So strictly control the water quality of the discharge outlet, monitoring has become our important work! This week, Xiaobian will understand the relevant issues with you!
In fact, a few years ago, the Yangtze River trunk line has installed real-time monitoring equipment for all sewage outfalls above the scale to strictly control the water quality of sewage outfalls along the Yangtze River. We know that the Yangtze River sewage outlet has the characteristics of large quantity, wide area and diverse types, and the monitoring capacity of sewage outlet into the river can be improved through water quality monitoring and other technologies.
The location and form of the discharge outlet should be approved by the local construction, health, environment and other departments in accordance with the environmental and urban planning requirements. It is required that the discharge outlet will not clog the river, and that it should be kept at a certain distance from water intake structures, swimming areas, residential areas, livestock drinking water areas, and fishing areas, so as not to affect shipping and water conservancy construction. It is also usually required that the outfall be located above the normal water level (stormwater outfall should be located above the flood level).
In addition, sewage discharge outlets are sometimes required to be located below the surface of the water body (such as high-foam, high-chroma sewage). It is required to take river bottom and bank reinforcement measures near the discharge outlet to prevent impact, erosion, backfilling and anti-freezing. For the discharge of sewage into the sea, it is also necessary to consider the impact of wind waves and ocean currents. The bank outlet is simple in structure and can directly discharge sewage into the water body, while the new outlet is composed of underwater sewage conveying pipe (steel pipe, cast iron pipe, etc.) and discharge head. The role of the discharge head is to discharge sewage from the sewage pipe into the water body, which is often divided into two types: centralized discharge head and decentralized discharge head. The sewage conveying pipe and discharge head should be firmly fixed at the bottom of the water body or laid in the pipe trench opened at the bottom and fixed by sinking or rockpiling. A simple sedimentation tank and a pressurized pumping station are standing in front of the discharge outlet in the center of the river. After treatment and pressurization, the sewage is sent into the sewage conveying pipe and then discharged into the water body through the discharge head.
In general, it is necessary to carry out real-time online monitoring of the water quality of the discharge outlet. Hangzhou Moody Technology is a manufacturer of online water quality monitoring instrument. The main products are: Escherichia coli online analyzer, biological toxicity online analyzer, heavy metal online analyzer in water and so on.
