Water Quality-Based Double-Gates Control Strategy for Combined Sewer Overflows Pollution Control
Zhongqing Wei,
Haidong Shangguan,
Jiajun Zhan,
Ruisheng Lin,
Xiangfeng Huang,
Lijun Lu,
Huifeng Li,
Banghao Du,
Gongduan Fan
Affiliations
Zhongqing Wei
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Haidong Shangguan
Fuzhou City Construction Design & Research Institute Co. Ltd., Fuzhou 350001, China
Jiajun Zhan
College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
Ruisheng Lin
College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
Xiangfeng Huang
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Lijun Lu
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Huifeng Li
State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Banghao Du
College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
Gongduan Fan
College of Civil Engineering, Fuzhou University, Fuzhou 350116, China
The combined sewer overflows (CSO) pollution has caused many serious environmental problems, which has aroused a worldwide concern. Traditional interception-storage measures, which exhibit the disadvantages of the larger storage tank volume and the low concentration, cannot efficiently control the CSO pollution. To solve this problem, a water quality-based double-gate control strategy based on the pollution based real-time control (PBRTC) rule was proposed, and the chemical oxygen demand (COD) concentration was taken as the control index. A case study was carried out in Fuzhou, China as an example, in which the hydraulic and water quality model were constructed to evaluate two schemes. According to the results, compared to the traditional scheme, the double-gate scheme can not only reduce the storage tank volume by 1515 m3, but also increase the average COD interception rate by 1.84 times, thus ensuring the effective and stable operation of the facility. Furthermore, the traditional scheme and the double-gate scheme were evaluated under design rainfall beyond the design return period, which confirmed the high performance of the double-gate scheme in controlling CSO pollution.
