Comprehensive treatment of marine aquaculture wastewater by a cost-effective flow-through electro-oxidation process
Comprehensive treatment of marine aquaculture wastewater by a cost-effective flow-through electro-oxidation process
复制标题
采用经济高效的流通式电氧化工艺综合处理海水养殖废水
DOI：
10.1016/j.scitotenv.2020.137812
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发表时间：
2020-06-20
影响因子：
9.8
通讯作者：
Li, Yawei
中科院分区：
文献类型：
--
作者：
Lang, Zhicheng;Zhou, Minghua;Li, Yawei
海水养殖废水的有效处理对保护海洋环境和海洋生物具有重要意义。本研究通过与电过氧化氢（EP）和电芬顿（EF）工艺的性能和能耗对比，验证了电化学氧化（EO）工艺综合去除海水养殖废水中NH4 +-N、NO2--N、COD、P以及杀菌和抗生素的可行性。由于游离氯的生成较多，对NH4 +-N和COD的去除效果依次为EO>> EP> EF。实验中采用了一种新型的流通式环氧乙烷反应器，该反应器提高了游离氯的生成速率和污染物的降解速率，性能优于流通式和间歇式反应器。该工艺对NH4 +-N和NO2--N的去除率均达到90%以上，处理后的NH4 +-N和NO2--N浓度均达到《海水养殖排水标准》（SC/T 9103 - 2007）的要求。同时，该工艺具有良好的杀菌性能，lg（c/c（0））为-5.6。同时，磺胺二甲嘧啶（SMT）和诺氟沙星（NOR）等抗生素可完全去除。能耗仅为0.054 kWh/g NH4 +-N（0.27 kWh/m3），这远比其他氧化工艺更具成本效益。新型流通式EO工艺对海水养殖废水中多种污染物的综合去除和杀菌具有很好的实际应用前景。(C)2020爱思唯尔B.V.保留所有权利。
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 NH4+-N, NO2--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 NH4+-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 NH4+-N and NO2--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(0)) 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 NH4+-N (0.27 kWh/m(3)), 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. (C) 2020 Elsevier B.V. All rights reserved.