铁碳微电解-生物膜法-高级氧化工艺处理印染废水中试研究

摘要

In the pilot scale study,the printing and dyeing wastewater was treated by iron-carbon microelectrolysis-biofilm-advanced oxidation process.The treated wastwater capacity was 7.2 t/d and the typical characteristics of the raw wastwater were as follows:COD of 800 ～ 1 200 mg/L,BOD5 of 150 ～ 280 mg/L,chroma of 280 ～ 350 times,TN of 20 ～ 35 mg/L,NH3-N of 15 ～25 mg/L,TP of 0.4 ～ 0.7 mg/L.The treatment effect with the combined process showed that the effluent quality was stable and the results were as follows:COD of 15 ～ 35 mg/L,BOD5 of 10 ～ 15 mg/L,chroma of 2 ～ 5 times,TN of 4 ～ 6 mg/L,NH3-N of 1 ～ 3 mg/L,TP of 0.05 ～0.1 mg/L.And the effluent quality met the emissions standard for the textile dyeing and finishing industry of the "Discharge Standard of Main Water Pollutants for Municipal Wastewater Treatment Plant & Key Industries of Taihu Aera" (DB 32-1072-2007).The cost of operation was RMB 3.514 Yuan/t.The degradation products were analyzed by UV spectrum scanning and the results showed that the organic pollutants in the wastewater were decomposed into CO2,H2O,etc.%采用铁碳微电解-生物膜法-高级氧化工艺对某印染厂废水处理进行中试研究.该工艺处理水量为7.2 t/d,原水水质:ρ(COD)为800 ～1 200 mg/L,ρ(BOD5)为150 ～ 280 mg/L,色度为280 ～ 350倍,ρ(TN)为20～35 mg/L,ρ(NH3-N)为15 ～ 25 mg/L,ρ(TP)为0.4～0.7 mg/L.经组合工艺处理后,出水ρ(COD)为15 ～ 35 mg/L,ρ(BOD5)为10～15 mg/L,色度为2～5倍,ρ(TN)为4～6 mg/L,ρ(NH3-N)为1～3 mg/L,ρ(TP)为0.05 ～0.1 mg/L,出水水质可达DB 32-1072-2007《太湖地区城镇污水处理厂及重点工业行业主要水污染物排放限值》中纺织染整工业排放标准要求,运行费用合计为3.514元/t.通过紫外光谱扫描对其降解产物进行分析,结果表明废水中降解产物主要为CO2、H2O等.