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腈纶废水是典型的难降解、高氨氮废水。为评价电化学氧化法对腈纶废水深度处理的实际运行效果,通过建立腈纶废水处理中试装置,考察了其对经AO生物处理后腈纶废水中COD、氨氮、总氮、BOD5等污染物的去除效果,分析了其运行能耗。结果表明:电化学氧化中试装置对经生物处理后腈纶废水中COD去除率为39.2%。稳定运行后,该装置对废水中氨氮、总氮的去除率分别为100%与75.1%。经电化学氧化处理后,废水中的COD、氨氮浓度达GB 8978—1996《污水综合排放标准》一级排放标准要求。电化学氧化处理不能显著提高腈纶废水的可生化性。
Acrylic wastewater is a typical non-degradable, high ammonia wastewater. In order to evaluate the actual operation effect of electrochemical oxidation process on the advanced treatment of acrylic fiber wastewater, the removal of COD, ammonia nitrogen, total nitrogen and BOD5 in the acrylic fiber wastewater after AO biological treatment was investigated by establishing the pilot plant of acrylic fiber wastewater treatment. Effect, analysis of its operational energy consumption. The results showed that COD removal rate of acrylic fiber wastewater after biological treatment was 39.2%. Stable operation, the device of ammonia nitrogen, total nitrogen removal rates were 100% and 75.1%. After the electrochemical oxidation treatment, the COD and ammonia nitrogen concentration in wastewater reaches the level I discharge standard of GB 8978-1996 Integrated Wastewater Discharge Standard. Electrochemical oxidation can not significantly improve the biodegradability of acrylic wastewater.