AS-SMBR工艺处理垃圾渗滤液实验研究

Experimental study on AS-SMBR process to treat landfill leachate

采用AS-SMBR工艺处理城市生活垃圾填埋场渗滤液,选择DO 2～4 mg/L、HRT50～60 h,在常温环境下运行结果表明:AS-SMBR工艺对垃圾渗滤液中COD和氨氮具有高效的去除效果,COD总去除率在50%～60%,NH3-N去除效率在95%以上;COD和NH3-N运行负荷分别为0.2～0.3 kg COD/(kg MLSS.d)和0.06～0.18 g NH3-N/(g MLSS.d);垃圾渗滤液生化系统对大分子物质的降解程度对膜去除效率有重要影响,两者对COD去除效率呈现波浪式交替变化。

The experiment was conducted at normal temperature with DO of 2～4 mg/L and HRT of 50～60 h.The results showed that the removal rates of COD and NH3-N were 50%～60% and more than 95%,respectively.The COD and NH3-N operation loads were stabilized at 0.2～0.3 kg COD/（kg MLSS·d） and 0.06～0.18 g NH3-N/（g MLSS·d）,respectively.The degradation of macromolecular substances at biochemical system had a serious effect on the removal rate of membrane rejection in bioreactor,COD removed by biochemical system and membrane rejection was alternatively fluctuated.