采用经济高效的流通式电氧化工艺对海水养殖废水进行综合处理。
Comprehensive treatment of marine aquaculture wastewater by a cost-effective flow-through electro-oxidation process.
机构信息
Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
Key Laboratory of Pollution Process and Environmental Criteria, Ministry of Education, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China; Tianjin Advanced Water Treatment Technology International Joint Research Center, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
出版信息
Sci Total Environ. 2020 Jun 20;722:137812. doi: 10.1016/j.scitotenv.2020.137812. Epub 2020 Mar 18.
The effective treatment of marine aquaculture wastewater is of great significance to protect marine environment and marine organisms. This study validated the feasibility of the comprehensive removal of NH-N, NO-N, COD and P, as well as disinfection and antibiotics removal from marine aquaculture wastewater by electrochemical oxidation (EO), comparing the performance and energy consumption with that by electro-peroxone (EP) and electro-Fenton (EF) process. Due to the formation of more free chlorine, the removal of NH-N and COD was in order of EO ≫ EP > EF. A new flow-through EO reactor was adopted, which was found enhanced the formation rate of free chlorine and degradation rate of pollutants, and thus performed better than that of flow-by reactor and batch reactor. By this flow-through EO process, the removal of NH-N and NO-N could reach >90% and their concentrations after treatment both meet the Water Drainage Standard for Sea Water Mariculture (SC/T 9103-2007). Meanwhile, the process had a good bactericidal performance with a lg(c/c) of -5.6. At the same time, antibiotics such as sulfadimidine (SMT) and norfloxacin (NOR) could be completely removed. The energy consumption was only 0.054 kWh/g NH-N (0.27 kWh/m), which was far more cost-effective than other oxidative processes. The new flow-through EO process has great practical application prospects for the comprehensive removal of multiple pollutants and sterilization from marine aquaculture wastewater.
有效处理海水养殖废水对保护海洋环境和海洋生物具有重要意义。本研究通过电化学氧化（EO）验证了综合去除 NH-N、NO-N、COD 和 P 以及消毒和去除抗生素的可行性，比较了其性能和能耗与电过氧（EP）和电芬顿（EF）工艺的性能和能耗。由于形成了更多的自由氯，NH-N 和 COD 的去除顺序为 EO＞EP＞EF。采用了一种新型的流通式 EO 反应器，发现其增强了自由氯的形成速率和污染物的降解速率，因此性能优于流通式和间歇式反应器。通过该流通式 EO 工艺，NH-N 和 NO-N 的去除率可达到>90%，处理后的浓度均符合《海水养殖水排放要求》（SC/T 9103-2007）。同时，该工艺具有良好的杀菌性能，lg(c/c)为-5.6。同时，磺胺嘧啶（SMT）和诺氟沙星（NOR）等抗生素也能被完全去除。能耗仅为 0.054 kWh/g NH-N（0.27 kWh/m），比其他氧化工艺更具成本效益。新型流通式 EO 工艺在海水养殖废水中去除多种污染物和消毒方面具有广阔的实际应用前景。
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