In this study,an up-flow anaerobic sludge blanket(UASB) reactor was applied to treat the high salinity wastewater from heavy oil production process.At a HRT of ≥24 h,the COD removal reached as high as 65.08% at an in...In this study,an up-flow anaerobic sludge blanket(UASB) reactor was applied to treat the high salinity wastewater from heavy oil production process.At a HRT of ≥24 h,the COD removal reached as high as 65.08% at an influent COD ranging from 350mg/L to 640mg/L.An average of 74.33% oil reduction was also achieved in the UASB reactor at an initial oil concentration between 112mg/L and 205mg/L.These results indicated that this heavy oil production related wastewater could be degraded efficiently in the UASB reactor.Granular sludge was formed in this reactor.In addition,two models,built on the back propagation neural network(BPNN) theory and linear regression techniques were developed for the simulation of the UASB system performance in the oily wastewater biodegradation.The average error of COD and oil removal was-0.65% and 0.84%,respectively.The results indicated that the models built on the BPNN theory were wellfitted to the detected data,and were able to simulate and predict the removal of COD and oil by the UASB reactor.展开更多
考察有机负荷率(OLR)的提高对升流式厌氧污泥床(UASB)反应器运行特性及丙酸氧化菌群的影响。结果表明,OLR由6 kg COD/(m3·d)逐步提高到54 kg COD/(m3·d)时,UASB的COD去除率可保持在92%以上,厌氧污泥的比产甲烷速率和比COD去...考察有机负荷率(OLR)的提高对升流式厌氧污泥床(UASB)反应器运行特性及丙酸氧化菌群的影响。结果表明,OLR由6 kg COD/(m3·d)逐步提高到54 kg COD/(m3·d)时,UASB的COD去除率可保持在92%以上,厌氧污泥的比产甲烷速率和比COD去除速率分别由130 L CH4/(kg VSS·d)和0.3 kg COD/(kg VSS·d)提高到827 L CH4/(kg VSS·d)和1.8 kg COD/(kg VSS·d)。随着OLR的逐步提高,系统中丙酸氧化菌群发生明显演替,其中,具有较低比生长速率(μ)和最大比降解速率(Umax)的Syntrophobacter wolinii和Pelotomaculum propionicicum被先后淘汰,而具有较高μ、Umax的P.schinkii逐渐成为系统的优势菌,具有较高μ、Umax的丙酸氧化菌的逐步富集可显著提高系统降解丙酸的能力,促进产甲烷菌群的增殖和代谢,使系统的整体处理效能得到显著提升。展开更多
基金the support provided by the Research & Technology Development Project of China National Petroleum Corporation (06A0302)Postdoctor Innovation Funds in Shandong Province (201002039)the Fundamental Research Funds for the Central Universities (27R1204023A)
文摘In this study,an up-flow anaerobic sludge blanket(UASB) reactor was applied to treat the high salinity wastewater from heavy oil production process.At a HRT of ≥24 h,the COD removal reached as high as 65.08% at an influent COD ranging from 350mg/L to 640mg/L.An average of 74.33% oil reduction was also achieved in the UASB reactor at an initial oil concentration between 112mg/L and 205mg/L.These results indicated that this heavy oil production related wastewater could be degraded efficiently in the UASB reactor.Granular sludge was formed in this reactor.In addition,two models,built on the back propagation neural network(BPNN) theory and linear regression techniques were developed for the simulation of the UASB system performance in the oily wastewater biodegradation.The average error of COD and oil removal was-0.65% and 0.84%,respectively.The results indicated that the models built on the BPNN theory were wellfitted to the detected data,and were able to simulate and predict the removal of COD and oil by the UASB reactor.
文摘考察有机负荷率(OLR)的提高对升流式厌氧污泥床(UASB)反应器运行特性及丙酸氧化菌群的影响。结果表明,OLR由6 kg COD/(m3·d)逐步提高到54 kg COD/(m3·d)时,UASB的COD去除率可保持在92%以上,厌氧污泥的比产甲烷速率和比COD去除速率分别由130 L CH4/(kg VSS·d)和0.3 kg COD/(kg VSS·d)提高到827 L CH4/(kg VSS·d)和1.8 kg COD/(kg VSS·d)。随着OLR的逐步提高,系统中丙酸氧化菌群发生明显演替,其中,具有较低比生长速率(μ)和最大比降解速率(Umax)的Syntrophobacter wolinii和Pelotomaculum propionicicum被先后淘汰,而具有较高μ、Umax的P.schinkii逐渐成为系统的优势菌,具有较高μ、Umax的丙酸氧化菌的逐步富集可显著提高系统降解丙酸的能力,促进产甲烷菌群的增殖和代谢,使系统的整体处理效能得到显著提升。
