ZHOU Le-le,ZHENG Kai-kai,WANG Yan,et al. Causes and Control Measures of Floating Sludge in Secondary Sedimentation Tank Based on Whole Process Analysis Method [J].China Water & Wastewater,2020,36(13):68-72.
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Causes and Control Measures of Floating Sludge in Secondary Sedimentation Tank Based on Whole Process Analysis Method

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第36卷 Number: 13 Page: 68-72 Column: Date of publication: 2020-07-01
Author(s):
(1.School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, China;
2. Wuxi Puhui Environmental Protection Technology Co. Ltd., Wuxi 214028, China; 3.Jiangsu
Key Laboratory of Anaerobic Biotechnology, Wuxi 214122, China; 4.Jiangsu Collaborative
Innovation Center of Water Treatment Technology & Material, Suzhou 215009, China)
Keywords:
floating sludge in secondary sedimentation tank; endogenous denitrification
Abstract:
The main causes of floating sludge in secondary sedimentation tank during the operation of a sewage treatment plant were analyzed. Through the whole process test and analysis and endogenous respiration denitrification experiments, it was found that low DO concentration at the end of the aerobic tank, good denitrification performance of activated sludge and endogenous denitrification were the main reasons for the formation of the floating sludge in the secondary sedimentation tank. The problem of the floating sludge in the secondary sedimentation tank was effectively solved after increasing the aeration flow rate at the end of the aerobic tank. The proposed whole process test and analysis method has important reference value for the operation and management of sewage treatment plant.
Last Update: 2020-07-01