ZHANGShao-hua,XUJian-jun,WANGWei,et al.haracteristics of Electro-Hybrid Ozonation-Coagulation (E-HOC) Process for Removal of Organic Matter and Total Phosphorus[J].China Water & Wastewater,2023,39(21):67-72.
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haracteristics of Electro-Hybrid Ozonation-Coagulation (E-HOC) Process for Removal of Organic Matter and Total Phosphorus

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第39卷 Number: 第21期 Page: 67-72 Column: Date of publication: 2023-11-01
Author(s):
ZHANG　Shao-hua1; 2;  XU　Jian-jun3;  WANG　Wei4;  JIN　Xin1;  JIN　Peng-kang1
（1. School of Human Settlements and Civil Engineering， Xi’an Jiaotong University， Xi’an 710049， China； 2. Lianhu Branch Environmental Monitoring Station， Xi’an Ecology and Environment Bureau， Xi’an 710082， China； 3. East China Branch， China Machinery International Engineering Design & Research Institute Co. Ltd.， Nanjing 210046， China； 4. School of Environmental and Municipal Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China）
Keywords:
electro-hybrid ozonation-coagulation process;  quasi class Ⅳ surface water quality;  COD;  TP
Abstract:
A pilot-scale electro-hybrid ozonation-coagulation (E-HOC) based on the principle of ozonation coupled with coagulation was constructed for the treatment of the effluent of a new integrated sewage treatment device from a wastewater treatment plant, so as to meet the demand for upgrading the effluent quality from wastewater treatment plants to the quasi class Ⅳ surface water quality standard. The performance of the E-HOC process for the removal of COD and TP in the new device effluent was investigated under different plate materials, influent flow rates, current densities and ozone dosages. The best performance of the E-HOC system was obtained when iron plates were used as the anode and cathode. The optimal operational conditions of the process were as follows: the maximum influent flow rate was 1.0 m3/h, the current density was 3.66 mA/cm2 and the ozone dosage was 6.8 mg/L, respectively. Under these conditions, the concentrations of COD and TP in the effluent met the quasi class Ⅳ surface water quality standard, the removal rates of COD and TP reached 69% and 86%, respectively, and the E-HOC system could withstand the maximum loading rate of 82.9 mg/(cm2·d) and 1.72 mg/(cm2·d) for COD and TP, respectively. In addition, the results of three-dimensional fluorescence analysis showed that the E-HOC process demonstrated significant performance for the removal of organic matter such as fulvic acids and soluble microbial metabolites.
Last Update: 2023-11-01