Enrichment of DNPAOs and characterization of biological phosphorus removal with O2 and as electron acceptors:Effect of different carbon sources and nitrate concentration
Effects of acetate-sodium concentration in the anaerobic stage and nitrate concentration in the anoxic stage on the inducement and enrichment of denitrifying phosphorus accumulating organisms (DNPlAos)were studied in an anaerobic(2h)/anoxic(2.75h)/aerobic(0.1h)sequencing batch reactor(SBR),at the same time,the difierent carbon source,such as methanol,acetate-sodium,butyric acid and glucose,was introduced respectively to investigate the emciency of DNPA.By adjusting the nitrate concentration.The percent of DNPIAOs to PAOs before inducement were 22％.And reached to 79％after inducement;when the ratio of COD to PO43-was 30.The quantity ratio of phosphorus uptake to the release was 1.58,the emciency of DNPA and nitrate removal reached to 89％and 98％.Respectively.The best removal ratio of △COD:△NO3:△PO4 was 1:O.18:0.22(gCOD:gN:gP);Acetate-sodium,butyric acid and glucose were all contributed to P-release,as well as P-uptake,and at the same COD concentration,the degressive order by the maximum quantity and rate of P-release was:acetate-sodium,butyric acid,glucose and methanol.Methanol,however,has insignificant or negligible effects on biological phosphorus removal,moreover,the concentration of orthophosphate in SBR was reduced actually at the beginning of anaerobic stage and then a slight P-release was observed when methanOl was injected.
DNPIAOs nitrate concentration acetate sodium concentration carbon source C／P ratio
Li qing ZHANG Lei WANG Gang ZHANG Lin jiang YUAN Zhi ying WANG
School of Environment and Mtmidlml Engineering,Xian university of Architecture & Technology,Xian 7 School of Environment and Mtmidlml Engineering,Xian university of Architecture & Technology,Xian 7 School of Environment and Mtmidlml Engineering,Xian university of Architecture&Technology,Xian 710
国际会议
西安
英文
653-660
2008-05-15（万方平台首次上网日期，不代表论文的发表时间）