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强化混凝-光电氧化组合工艺深度处理垃圾渗滤液膜滤浓缩液

Keywords: 垃圾渗滤液,膜滤浓缩液,强化混凝,光电氧化

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Abstract:

采用强化混凝-光电氧化组合工艺对北京某垃圾填埋场垃圾渗滤液膜滤浓缩液进行处理。探讨了不同混凝剂投加量、电流密度和反应时间对COD去除率的影响,并考察了溶解性有机物的分子量和结构在本工艺中的变化。结果表明:同时投加Ca(OH)2、Fe2(SO4)3和PAM混凝后,COD去除率为28.00%,含量由4700mg/L降低到3384mg/L;同时投加KMnO4、Fe2(SO4)3和PAM进行二次混凝,COD去除率为60.20%,含量为1870mg/L;混凝后水样在电流密度为400A/m2,经3h光电氧化后,COD去除率为86.20%,含量为650mg/L。本工艺将垃圾渗滤液膜滤浓缩液中部分大分子量有机物降解为小分子量有机物;光电氧化后,有机物结构被迅速破坏。

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