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陶瓷电镀废水的三级处理工艺

Keywords: 陶瓷电镀废水,混凝沉降,重金属捕捉剂,pH

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Abstract:

以色度、浊度、悬浮物浓度、电导率及金属离子浓度为检测指标,研究进水pH、混凝剂种类与投量、沉降时间及重金属捕捉剂对陶瓷电镀废水的处理效果,探讨陶瓷电镀废水处理的适宜操作条件及工艺组合。实验表明,陶瓷电镀废水的组合处理工艺:调整废水pH为一级处理,投加PAC的混凝沉降法为二级处理,投加重金属捕捉剂为三级处理;先调节废水pH至9,投加50mg/L的PAC,再投加20mg/L重金属捕捉剂,此时废水的色度降至10倍,浊度降至16NTU,悬浮物浓度降至210mg/L去除率达到95.1%,各金属离子浓度也明显降低,处理出水的悬浮物达到《污水综合排放标准》(GB8978-1996)的三级标准,其他各指标均达到《电镀污染物排放标准》(GB21900-2008)。

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