Introduction
Shanghai Second-phase Sewage Treatment Pump Station Project is an important part of the urban sewage system in Shanghai, designed to solve polluted waters existing in the city, and to provide a better living environment for citizens. This project was launched in 2012, with the purpose of improving water quality and capacity throughout the city, modernizing the sewage system, and making usage for optimal facilities. The project also focuses on technological innovation, introducing technical processes to save energy and improve the quality of wastewater.
Background
As an industrial metropolis, Shanghai has always had high concentrations of pollutants in its waterways. These pollutants come from not just urban construction activities, but also industrial waste. For example, some factories produce highly contaminated wastewaters, such as oil and heavy metals, causing the water quality to deteriorate further. In order to guarantee the safety of drinking water and other water uses, the Shanghai Municipal Government has invested in the Second-phase Sewage Treatment Pump Station Project to effectively reduce wastewater pollution.
Technical Innovations
The designers of the project prioritized the incorporation of advanced technology to help alleviate the worsening water quality. The most significant of the technical changes included online monitoring, high-pressure large-diameter pipes, membrane bioreactors, and oxygen aeration.
Online Monitoring
The cost of damage caused by sewage accumulation is immense. To prevent such scenarios, the entrance and end of the pipeline were equipped with integrated online monitoring systems that are co-managed by municipal management centers and the water bureau. Applying embedded systems, such as video surveillance systems, supervisory control and data acquisition systems and wastewater flow detection systems, enable real-time monitoring of wastewater and detect any potential fault.
High-Pressure Large-Diameter Pipes
To reduce water pipe friction, high-pressure stratum pipes were installed in place of the original ones. By increasing the diameter of pipe orifices, the pressure was reduced by 10 percent, allowing the flow rate to increase significantly while decreasing the energy consumption. The pipes have greater load capacity, allowing a higher volume of water to be processed.
Membrane Bioreactor
Membrane bioreactors also play an important role in wastewater treatment. The membrane bioreactor combines a membrane system and a biological reactor. It separates the permeable organic compounds from the wastewater through filtration, while promoting the growth of beneficial microorganisms.
Oxygen Aeration
The original oxygen aeration process solely relied on compressed air. In order to increase water treatment efficiency, the designers introduced an oxygen-enriched bioreactor, and then combined the oxygen-enriched bioreactor with a hybrid cooling system, creating a cost- and energy-saving system.
Results
The Second-phase Sewage Treatment Pump Station Project has achieved two important objectives. Firstly, it has vastly improved the quality of the wastewater, with pollutant levels now falling within standard limits. Secondly, it has addressed the limited capacity of Shanghais sewage systems. Through the use of advanced technologies, the new system has increased the volume of water treated daily, from 50000 tons per day to 80000 tons. The enhanced quality of sewage treatment also lessens the possibility of environmental disasters, ensuring a pleasant living environment for Shanghai citizens.
Conclusion
Shanghai Second-phase Sewage Treatment Pump Station Project has successfully improved water quality and volume in the city with the help of advanced technologies such as online monitoring, high-pressure large- diameter pipes, membrane bioreactors, and oxygen aeration. The success of this project is testament to the effort and skill of the engineers and designers involved, as well as the support of the municipal government. Through the use of innovative technology, the quality of Shanghais living environment has been protected, providing citizens with clean and safe water sources.
