LIXuan,LIUWu-ping,ZHOUQiong,et al.Comparison of Treatment Efficiency of Composite Magnetic Seed Coagulation and Magnetic Coagulation on Black and Odorous Water[J].China Water & Wastewater,2024,40(7):13-18.
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Comparison of Treatment Efficiency of Composite Magnetic Seed Coagulation and Magnetic Coagulation on Black and Odorous Water

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第40卷 Number: 第7期 Page: 13-18 Column: Date of publication: 2024-04-01
Author(s):
LI　Xuan1;  LIU　Wu-ping2;  ZHOU　Qiong3;  FANG　Hua3;  YANG　Shun3;  ZHAO　Jin-yu3
（1. Jiangsu Environmental Engineering Technology Co. Ltd.， Nanjing 210019， China； 2. Southwest Municipal Engineering Design & Research Institute of China， Chengdu 610081，China； 3. School of Environmental Science & Engineering， Nanjing University of Information Science & Technology， Nanjing 210044， China）
Keywords:
magnetic coagulation;  composite magnetic seed;  zeolite;  nano-Fe3O4;  black and odorous water
Abstract:
Based on preparation and characterization of nano-Fe3O4 and zeolite composite magnetic seed, the treatment efficiency of coagulation, magnetic coagulation and composite magnetic seed coagulation on black and odorous water was compared. The results showed that the content of iron in the composite magnetic seed was about 20.0%, and the skeleton structure and composition of zeolite were not changed. When PAC dosage was 60 mg/L and magnetic seed dosage was 1-2 g/L, magnetic coagulation and composite magnetic seed coagulation could obtain optimal removal effects on black and odorous water. Magnetic coagulation enhanced the coagulation effect and increased the removal rate of turbidity, TP and COD, but could not effectively remove ammonia nitrogen. The composite magnetic seed coagulation effectively removed ammonia nitrogen in water and comprehensively improved effluent quality. The pollutants in black and odorous water mainly existed in the form of dissolved state, and coagulation and magnetic coagulation could not effectively remove dissolved pollutants, so the removal effects of ammonia nitrogen and COD were poor. However, higher TP removal rate was obtained through chemical phosphorus removal. Composite magnetic seed coagulation could strengthen the removal of dissolved pollutants by ion exchange and adsorption of zeolite, and obtained better ammonia nitrogen and COD removal. Moreover, composite magnetic seed coagulation achieved complete phosphorus removal by loaded nano-Fe3O4.
Last Update: 2024-04-01