ZHAOZhi-tai,LIJian,KONGXiao-guang,et al.Removal of TP and SS from Effluent of Secondary Sedimentation Tank with Novel Air Flotation Equipment[J].China Water & Wastewater,2022,38(9):18-24.
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Removal of TP and SS from Effluent of Secondary Sedimentation Tank with Novel Air Flotation Equipment

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第38卷 Number: 第9期 Page: 18-24 Column: Date of publication: 2022-05-01
Author(s):
ZHAO　Zhi-tai1; 2;  LI　Jian3;  KONG　Xiao-guang1;  ZHAO Zhi-neng4;  LI　Xue-ning5;  MIAO　Zhi-quan1;  SONG　Xin5;  ZHANG Wen-bo1;  QIAO　Hai-bing1; 2;  SUN　Shi-quan5
（1. Henan Urban and Rural Planning and Design Research Institute Co. Ltd.， Zhengzhou 450044， China； 2. Henan Water Quality Guarantee and Water Environment Restoration Engineering Technology Research Center， Zhengzhou 450044， China； 3. Shanghai Dazhong Jiading Sewage Treatment Co. Ltd.， Shanghai 201800， China； 4. Henan Lianglong Real Estate Co. Ltd.， Jiaozuo 454150， China； 5. School of Hydraulic and Environmental Engineering， Changsha University of Science & Technology， Changsha 410114， China）
Keywords:
air flotation;  effluent of secondary sedimentation tank;  advanced treatment;  TP;  SS
Abstract:
A novel air flotation process was developed and used for advanced treatment of the effluent from the secondary sedimentation tank of the municipal wastewater treatment plant. The effects of coagulant type, water temperature, reflux ratio and surface load on the removal of TP and SS in the novel air floatation equipment were investigated. The results showed that the effluent concentration of TP was lower than 0.3 mg/L after the advanced treatment, and the TP concentration in effluent was stable and was not affected by the temperature. The novel air floatation equipment could reduce SS and maintain the effluent SS below 20 mg/L by only adding PAC. Moreover, compared with high-efficiency sedimentation tanks, the novel air flotation process had low operating costs and good economic benefits.
Last Update: 2022-05-01