Study on electrochemical heterogeneous catalytic ozonation process for treatment of coking wastewater
LI Xin-yang1,2, LI Yan-nan1,2, QI Dan-yang1,2, ZHANG hao1,2, CHEN An-sheng1, YU Xiao-hua1,2, YAO hong1,2
1. Beijing International Scientific and Technological Cooperation Base for Antibiotics and Resistance Gens Control, School of Civil Engineering and Architecture, Beijing Jiaotong University, Beijing 100044, China; 2. Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Beijing Jiaotong University, Beijing 100044, China
Abstract：In this paper, a new electric-heterogeneous ozone-catalyzed (E-catazone) process was used in advanced treatment of the secondary biochemical effluent from coking wastewater, and the process's feasibility was also studied. By comparing the E-catazone process with three other processes:the O3/TiO2 nanoflowers (TiO2-NF) process, the O3/TiO2-NF/H2O2 process, and the electrochemical oxidation process (EO), the technological advantages and oxidation mechanism of E-catazone were investigated. Under the same conditions (O3 concentration of 84mg/L), the removal rates of COD and TOC (67.9%, 50.0%) in E-catazone process were significantly superior to the performance (25.8%, 20.9%) in O3/TiO2-NF process. Even with 5g/L of H2O2 added in the above O3/TiO2-NF system to promote homogeneous ozone catalytic ability, the obtained removal rates of COD and TOC had only increased to 63.6% and 43.6%, respectively. The performance of O3/TiO2-NF/H2O2 system was still not as good as the E-catazone process.
李新洋, 李燕楠, 祁丹阳, 张昊, 陈安生, 于晓华, 姚宏. 电-多相臭氧催化工艺深度处理焦化废水[J]. 中国环境科学, 2020, 40(10): 4354-4361.
LI Xin-yang, LI Yan-nan, QI Dan-yang, ZHANG hao, CHEN An-sheng, YU Xiao-hua, YAO hong. Study on electrochemical heterogeneous catalytic ozonation process for treatment of coking wastewater. CHINA ENVIRONMENTAL SCIENCECE, 2020, 40(10): 4354-4361.
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