混凝法處理含銅電鍍廢水的實驗研究

摘要: 以FeSO4、PAC作為絮凝劑去除低濃度電鍍廢水中的Cu2+，考察了絮凝劑投加量、溶液pH值、攪拌速度和時間等影響因素，結(jié)果表明，在各自最佳條件下，PAC和FeSO4對Cu2+的去除可達(dá)到99.37%和99.20％，達(dá)到《污水綜合排放標(biāo)準(zhǔn)》(GB 8978-1996)中一級排放標(biāo)準(zhǔn)。最后通過對FeSO4、PAC和NaOH 3種藥劑的綜合分析和比較，發(fā)現(xiàn)FeSO4絮凝處理低濃度電鍍廢水中的銅比PAC絮凝、NaOH沉淀法操作簡單，污泥產(chǎn)生量少、工業(yè)應(yīng)用性強(qiáng)而且去除率高。

中文摘要:

以FeSO4、PAC作為絮凝劑去除低濃度電鍍廢水中的Cu2+，考察了絮凝劑投加量、溶液pH值、攪拌速度和時間等影響因素，結(jié)果表明，在各自最佳條件下，PAC和FeSO4對Cu2+的去除可達(dá)到99.37%和99.20％，達(dá)到《污水綜合排放標(biāo)準(zhǔn)》(GB 8978-1996)中一級排放標(biāo)準(zhǔn)。最后通過對FeSO4、PAC和NaOH 3種藥劑的綜合分析和比較，發(fā)現(xiàn)FeSO4絮凝處理低濃度電鍍廢水中的銅比PAC絮凝、NaOH沉淀法操作簡單，污泥產(chǎn)生量少、工業(yè)應(yīng)用性強(qiáng)而且去除率高。

英文摘要:

The ferric sulphate and PAC as flocculants were used to remove Cu2+ from the low concentration electroplating wastewater. The factors such as the contents of flocculants, pH of solution and so on were mainly and respectively observed. The experimental results show that under the optimum conditions of flocculation reaction with PAC and FeSO4,the removal rate of Cu2+ can reach 99.37% and 99.20% respectively which can meet the first level discharge standard of “Integrated Wastewater Discharge Standard”(GB 8978-1996). Moreover, by comparison of FeSO4, PAC and NaOH, it can be concluded that Fe2+ flocculation has better performance in operation, less sludge amounts and more practical industrial application than PAC flocculation and NaOH chemical precipitation, and it has higher removal rate in treating copper (Ⅱ) of low concentration industrial wastewater.

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