LIULiu,NIHuang-lei,LIANGJun,et al.Effect of Different Radial Distribution of Activated Sludge on Nitrogen and Phosphorus Removal in Secondary Settling Tank[J].China Water & Wastewater,2022,38(15):104-108.
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Effect of Different Radial Distribution of Activated Sludge on Nitrogen and Phosphorus Removal in Secondary Settling Tank

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第15期 Page: 104-108 Column: Date of publication: 2022-08-01
Author(s):
LIU　Liu1;  NI　Huang-lei2;  LIANG　Jun1;  XU　Jian1;  CHEN　Hao3;  LIANG　Xue-feng1;  LIU　Jun4
（1. Zhejiang Industrial Design ＆ Research Institute Co. Ltd.， Hangzhou 310051， China； 2. Zhejiang Fuchun Ziguang Environmental Protection Co. Ltd.， Hangzhou 310013， China； 3. Changzhou Dingheng Electromechanical Equipment Co. Ltd.， Changzhou 213000， China； 4. Department of Civil Engineering， Tongji Zhejiang College， Jiaxing 314051， China）
Keywords:
secondary settling tank;  radial distribution;  activated sludge;  nitrogen and phosphorus removal;  settleability
Abstract:
The settling performance and organic matter content of different radially distributed activated sludge in the secondary settling tank of a municipal wastewater treatment plant in Pujiang were analyzed, and their effects on nitrogen, phosphorus and SS removal were investigated. Along the radial distribution (from inside to outside) of the secondary settling tank, sludge settleability gradually decreased, organic matter content gradually increased, and the number of microorganisms increased first and then decreased. The activated sludge at the middle of the radial direction had better nitrogen and phosphorus removal performance and higher SS removal efficiency.
Last Update: 2022-08-01