【摘要】 将ASBR和SBR反应器组合起来,形成一种序批式操作的城市垃圾渗滤液处理工艺。ASBR反应器作为厌氧消化反应器,主要完成初步降解有机物的目的,将原水加入ASBR中进行厌氧消化,研究了废水在28.8~72 h四种不同水力停留时间(HRT)下的处理效果,结果表明,将ASBR的HRT控制在36 h,COD去除率保持41.2%的同时,出水ρ(BOD5)/ρ(COD)及ρ(BOD5)/ρ(NH4+-N)分别为0.41和4.6,对有机物和氮的后续好氧生物去除较为有利。经SBR处理后出水NH4+-N含量稳定在11 mg/L左右,但出水COD浓度达不到排放标准,经添加混凝剂聚合硫酸铁(PFS)混凝沉淀处理后废水中COD含量可降至100 mg/L以下。更多还原

【Abstract】 Biological nitrogen and organic matter removal of municipal landfill leachate by ASBR-SBR system was investigated.The cycle length of both reactors was 12 h.Raw wastewater was fed to ASBR for anaerobic digestion.Four sorts HRT of ASBR from 28.8 h to 72 h were tested.The result indicated that the COD removal achieved 41.2% and the effluent BOD₅/COD and BOD₅/NH⁺₄-N ratio was 0.41 and 4.6 respectively when the HRT of ASBR was 36 h,it was in favor of aerobic biological treatment of organic matters and nitrogen.The effluent of ASBR whose HRT was 36 h was added to SBR for further treatment.And the effluent NH⁺₄-N of SBR was about 11 mg/L,but the effluent COD concentration couldn’t meet the discharging standard.The effluent COD could be lowered to less than 100 mg/L after coagulating sedimentation by PFS.更多还原