UV/PMS/电化学高级氧化体系深度处理高盐有机废水

UV/Persulfate Assist Electrochemical Oxidation Coupling Process to Effectively Treat Pickle Wastewater

高盐有机废水产生途径广泛,其含有的大量盐分及有毒有害的有机物会对环境造成严重破坏。泡菜废水作为一种典型的高盐有机废水,其高盐度、高有机物、高氮磷、高悬浮物(SS)的水质特征,导致了传统工艺技术难以实现其氨氮和COD的同步有效去除。本研究提出了一种UV/过硫酸盐(PMS)辅助电化学高级氧化耦合工艺(EO/UV/PMS),实现了泡菜废水的深度处理。在最佳条件下(30 mA/cm^(2),2 g/L PMS和pH=5.5),NH_(3)-N和COD的去除率可达到100%和71.5%。对EO/UV/PMS耦合工艺降解机制研究表明,活性氯和氯类自由基对NH_(3)-N和COD的去除发挥了重要作用。本研究不仅为传统的高盐有机废水处理提供了可靠的理论依据,同时也为新兴的新能源行业产生的高盐废水处理提供了一种解决思路。

Highly saline organic wastewater is generated from many industries,and its large amounts of salts and toxic and harmful organic substances can cause many environmental problems.As a highly saline organic wastewater,the pickle wastewater had high salinity,high organic matter,high nitrogen and phosphorus,and high suspended solids(SS).Due to the quality characteristics of pickle wastewater,it is challenging to remove ammonia nitrogen and COD by traditional technology.In this study,a UV/persulfate(PMS)-assisted electrochemical advanced oxidation coupled process(EO/UV/PMS)was proposed to realize the efficient treatment of pickle wastewater.Under the optimal conditions(30 mA/cm^(2),2 g/L PMS,and pH=5.5),the removal of NH_(3)-N and COD could reach 100% and 71.5%.The study showed that the active chlorine and chlorine radicals played an important role in the removal of NH_(3)-N and COD during the treatment of pickle wastewater by the EO/UV/PMS coupling process.This study provides a reliable theoretical basis for the treatment of pickle wastewater and also provides a solution for the treatment of high-salt wastewater associated with the emerging new energy industry.