HE Yang,YUAN Shao-chun,JIANG Bin.Design Change and Practice of Sewage Treatment Project under the Background of New Local Standards[J].China Water & Wastewater,2021,37(8 8):78-82.
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Design Change and Practice of Sewage Treatment Project under the Background of New Local Standards

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 8 8 Page: 78-82 Column: Date of publication: 2021-04-17
Author(s):
HE Yang1; YUAN Shao-chun2; JIANG Bin2
(1. Southwest Municipal Engineering Design & Research Institute of China， Chengdu 610081， China; 2. Key Laboratory of Ministry of Education for Hydraulic and Water Transport Engineering, Chongqing Jiaotong University, Chongqing 400074, China)
Keywords:
design change; multi-stage AO; deep bed denitrification filter; advanced treatment
Abstract:
The total treatment capacity of the Neijiang second sewage treatment plant in Sichuan Province is 10×104 m3/d, and the design treatment capacity of the first phase is 5×104 m3/d. According to discharge requirements of Minjiang River and Tuojiang River Basin Water Pollution Discharge Standards of Sichuan Province (DB 51/2311-2016), the original combined process consisting of pretreatment, modified A2O, fiber filter and UV disinfection was changed into pretreatment, multi-stage AO, high efficiency sedimentation tank, deep bed denitrification filter and sodium hypochlorite contact disinfection. A simulation model of multi-stage AO dephosphorization and denitrification process was established by using WEST software, and optimal operational parameters were obtained. The removal efficiencies of TN, SS, TP, COD, NH3-N and BOD5 reached 81.8%, 98.3%, 94.8%, 91.1%, 97.3% and 93.3%, respectively, and the effluent quality met the discharge requirements of local standards. Design of the project was changed in time, which effectively avoided the waste of investment.
Last Update: 2021-04-17