Suzhou No.1 Wastewater Treatment Plant
As part of China’s commitment to sustainable development, Suzhou Industrial Park, in the Jiangsu province, was selected to be one of the first national carbon-peaking pilot parks in 2023. Covering an area of 278 km² and home to 1.37 million people, the park includes the Suzhou No.1 Wastewater Treatment Plant, which has recently been upgraded and equipped with 367 new valves from AVK.
Carbon-peaking pilot park: Suzhou No.1 Wastewater Treatment Plant sets an example
With a treatment capacity of 200,000 cubic metres per day, Suzhou No.1 Wastewater Treatment Plant is the sole wastewater treatment facility in the northern part of Suzhou Industrial Park. Currently, an expansion project is under construction, with an expansion capacity of 150,000 cubic metres per day. It adopts the advanced process of pre-treatment, enhanced multi-stage aerobic oxidation (AO), high-efficiency sedimentation tank, V-shaped filter, and sodium hypochlorite disinfection. After the completion of the current expansion project, the total treatment capacity of the wastewater treatment plant will rise to 350,000 cubic metres per day.
Comprehensive application, enabling efficient and energy-saving operation
AVK has provided a wide-ranging valve solution for the current expansion project, including multiple series of products such as gate valves, butterfly valves, knife gate valves, plunger valves, and penstocks, totalling 367 units (DN80-1200). These valves are applied in various key processes, covering more than 90% of the total number of valves installed at the plant, ensuring stable operation of the wastewater treatment system.
AVK has supplied electrical actuated metalseated valves, ranging up to DN1000, that have been installed in connection with the sedimentation tanks. The valves have been designed using special copper alloy seats to secure optimal sealing.
On the pipeline connecting the aeration tank to the primary sedimentation tanks, large diameter knife gate valves (DN1000-1200) have been installed. The knife gate valves were selected because of their ability to work in high solid particle wastewater. AVK plunger valves were selected for the aeration processes and equipped with remote actuation to allow for precise air regulation, which is essential for maintaining optimal process conditions.
AVK’s solution supports the industrial park in building a zero-carbon future
AVK’s solution supports the implementation and efficient operation of the expansion project of Suzhou No.1 Wastewater Treatment Plant, enhancing its protective role in the Taihu Lake Basin and the Wusong River. This is just the starting point of the new practices of this wastewater treatment plant. The project is undergoing a comprehensive low-carbon transition, turning wastewater into a resource
by converting by-product sludge into fuel for thermal power plants. At the same time, a 4.482 MW distributed photovoltaic system is being installed, expected to generate 4.39 million kWh annually and reduce carbon dioxide by approximately 2,632 tonnes per year.