Two-phase Anaerobic Membrane Biosystem for Treatment of Papermill Wastewater
两相厌氧膜-生物系统处理造纸废水

The study utilizes the process combined conventional twophase anaerobic biosystem with membrane separation(MBS)to treat papermaking wastewater.COD removal of this system is 73.1%,and it is higher than that of conventional twophase anaerobic biosystem(BS),which COD removal is 48.6%.And MBS is superior to BS in activity of anaerobic biosolids and in operation stability.When the COD loading is 6 kg·(m3·d)-1,the acidification rate is 20.1% and the acidification level is 7.5% in MBS,which is slightly higher than in BS(7.0% and 5.0%,respectively).But the acidification rate and the acidification level in both systems are still very low.The article inquires into the reasons for low acidification features and the effect of membrane introduced,and discusses the assessment system of twophase anaerobic system.