摘要
垃圾焚烧厂渗滤液因水质复杂,NH3-N、COD和电解质含量高等特点,成为一种难处理有机废水。采用负压蒸发浓缩法对渗滤液及电絮凝预处理渗滤液的处理进行了对比研究,并考查了浓缩比、pH等因素的影响。研究结果表明,电絮凝预处理不能改变渗滤液中COD、NH3-N的蒸发去除规律,即蒸发处理过程中,蒸发冷凝液中COD在蒸发前期和后期含量较高,蒸发中期较低;而NH3-N含量在蒸发处理前期较高,中后期含量较低。pH对蒸发处理影响较大,在酸性pH下COD去除率较低,但NH3-N去除率较高,可达95%以上,而在中碱性pH下,COD去除率增高,NH3-N去除率降低。渗滤液及电絮凝预处理渗滤液的一次蒸发冷凝液,经过二次蒸发处理后,冷凝液中COD和NH3-N含量均能达到一级排放标准,即分别低于100 mg/L和15 mg/L。
Treatment of the original and electrocoagulation pretreated leachate from municipal solid waste incinerator plants（MSWIP） by a vacuum evaporation method was investigated.The results showed that electrocoagulation pretreatment of leachate did not have significant effects on the changing trend of COD and NH3-N in the evaporation process,i.e.COD concentration in the distillates was higher in early and latter period of the evaporation,while NH3-N evaporation occurred only in the early period.Besides,pH had a significant effect on COD and NH3-N removal during the evaporation treatment process.Under acidic condition low COD removal and high NH3-N removal were obtained,but under neutral and alkaline conditions,COD removal increased sharply and NH3-N removal decreased.In addition,experiments on dual evaporation treatment revealed that the COD and NH3-N concentrations of the distillates of both leachates with and without electrocoagulation pretreatment are lower than 100 mg/L and 15 mg/L,respectively.
出处
《环境工程学报》
CAS
CSCD
北大核心
2012年第10期3645-3650,共6页
Chinese Journal of Environmental Engineering
基金
重庆市节能减排科技"接力"行动科技专项(CSTC2010AA7060)
关键词
生活垃圾焚烧发电厂
渗滤液
蒸发浓缩
废水处理
电絮凝
municipal solid waste incinerator plant
leachate
evaporation
wastewater treatment
electrocoagulation
