电化学和O3/UV/H2O2不同组合方法处理成熟垃圾渗滤液的效果评价

Electra Polatidou, K. Azis, C. Polatides, Nikolaos Remmas, S. Ntougias, P. Melidis
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引用次数: 2

摘要

摘要本研究考察了O3/UV/H2O2不同组合的电化学处理及应用对成熟垃圾渗滤液的净化效果。在初步实验的基础上,采用间隙为2 cm的不锈钢电极,在50 mA/cm2、pH为6、O3浓度为120 L/h、UV浓度为991 J/cm2、H2O2浓度为1 g/L的条件下进行电化学处理。采用电化学处理和O3/UV/H2O2在最佳条件下的处理方法为:1)电化学处理后,O3/UV/H2O2进行固体沉淀;2)电化学处理后,O3/UV/H2O2进行沉淀处理;3)O3/UV/H2O2进行电化学处理。O3/UV/H2O2预处理后的电化学性能较差。固体、TKN和总COD (tCON)的去除主要通过电絮凝实现,而颜色和可溶性COD (sCOD)的降低主要归功于电化学氧化。实验设置1是最有效的处理方案,tCOD、sCOD、TKN、TSS、SACUV254nm和色号分别降低73%、80%、76%、79%、94%和98%。实际上,O3/UV/H2O2步骤在垃圾渗滤液处理过程中效果受到限制,因此可以省略。综上所述,电化学处理后再进行沉淀处理,可以有效地减少营养物和颜色。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluation of electrochemical and O3/UV/H2O2 methods at various combinations during treatment of mature landfill leachate
Abstract In this study, electrochemical treatment and application of O3/UV/H2O2 in various combinations were evaluated in respect to their efficiency to depurate mature landfill leachate. Based on preliminary experiments, electrochemical treatment using stainless-steel electrodes at 2 cm gap was performed optimally at 50 mA/cm2 and pH 6, while application of O3 at 120 L/h, UV at 991 J/cm2 and H2O2 concentration of 1 g/L was carried out. Electrochemical treatment and O3/UV/H2O2 under optimal conditions were applied as follows: I) electrochemical treatment, followed by O3/UV/H2O2 and solids precipitation, II) electrochemical treatment, followed by precipitation and then by O3/UV/H2O2 treatment, and III) O3/UV/H2O2, followed by electrochemical treatment. A low performance was observed when O3/UV/H2O2 preceding electrochemical treatment. Solids, TKN and total COD (tCON) removal was primarily achieved through electrocoagulation, whereas color and soluble COD (sCOD) reduction was mainly attributed to electrochemical oxidation. Experimental setup I was the most efficient treatment scheme, resulting in tCOD, sCOD, TKN, TSS, SACUV254nm and color number reduction of 73%, 80%, 76%, 79%, 94% and 98%, respectively. Indeed, O3/UV/H2O2 step could be omitted since its effectiveness was restricted during landfill leachate treatment. In conclusion, electrochemical treatment followed by precipitation could result in effective reduction of nutrients and color.
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