【摘要】 高氨氮废水的处理是目前亟需解决的问题。采用双极膜电渗析工艺(BMED)处理氨氮废水并结合响应面法,考察了电流密度、膜面流速及进料体积比这3个因素对氨氮在碱隔室内回收量以及酸隔室内泄露量的影响。结果表明:这3个影响因素的显著性顺序由大到小为:电流密度>膜面流速>进料体积比;权衡较高的氨氮回收效果的同时满足较少的氨氮泄露程度,3个因素在规定范围内,最适宜的操作条件应为电流密度25 m A/cm~2、流速4 cm/s、进料体积比0.84∶1,在此条件下,氨氮回收浓度达1.973 g/L,泄露浓度为0.138 g/L。更多还原

【Abstract】 Treatment of wastewater containing high ammonia nitrogen is one of the urgent environmental issues to cope with. In this experimental study, BMED(bipolar membrane electro-dialysis) technology was adopted, combined with the response surface method, to treat wastewater of high ammonia nitrogen concentration, aimed at investigation of effects of the operation parameters, i.e. current density, the flow rate, the initial volume ratio on the recovery in base compartments and the leakage in acid compartments of ammonia nitrogen was studied. The study showed that the order of significance of these three parameters from large to small as current density, flow rate, initial volume ratio. The optimized condition of BMED was current density 25 m A/cm~2, the flow rate 4 cm/s, and the initial volume ratio 0.84∶1; and under this operation condition, the recovery was 1.973 g/L and leakage of ammonia nitrogen 0.138 g/L.更多还原