Nitrification characteristics of nitrobacteria immobilized in waterborne polyurethane in wastewater of corn-based ethanol fuel production

查看全文 作　　者：Yamei [1,2]Dong;Zhenjia [1]Zhang;Yongwei [1]Jin;Jian [3]Lut;Xuehang [4]Cheng;Jun [5]Li;Yan-yan [1]Deng;Ya-nan [5]Feng;Dongning [1]Chen

机构地区：[1]School of Environmental Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China;[2]National Engineering Research Center for Nanotechnology,Shanghai 200241,China;[3]Indian River Research and Education Center,University of Florida,Fort Pierce,FL 34945,USA;[4]Division of Environmental Science and Engineering,Yamaguchi University,Tokiwadai 2-16-1,Yamaguchi 755-8611,Japan;[5]School of Municipal and Environmental Engineering,Shengyang Jianzhu University,Shenyang 110168,China

出　　处：《Journal of Environmental Sciences》索引2012年第24卷第6期,共7页

基　　金：supported by the National Water Pollution Control and Management Technology Major Projects(No. 2008ZX07101-010-03);the National Natural Science Foundation of China (No. 50708058);the National High Technology Research and Development Program (863)of China (No. 2012AA062703);the Shanghai Municipal Science and Technology Commission Major Project (No.04DZ12030-2);the Shanghai Committee of Science and Technology (No.10231201800) 摘　　要：A technology to achieve stable and high ammonia nitrogen removal rates for corn distillery wastewater (ethanol fuel production) treatment has been designed.The characteristics of nitrifying bacteria entrapped in a waterborne polyurethane (WPU) gel carrier were evaluated after acclimation.In the acclimation period,nitrification rates of WPU-immobilized nitrobacteria were monitored and polymerase chain reaction (PCR) was also carried out to investigate the change in ammonium-oxidizing bacteria.The results showed that the pellet nitrification rates increased from 21 to 228 mg-N/(L-pellet·hr) and the quantity of the ammonia oxidation bacteria increased substantially during the acclimation.A continuous ammonia removal experiment with the anaerobic pond effluent of a distillery wastewater system was conducted with immobilized nitrifying bacteria for 30 days using an 80 L airlift reactor with pellets at a fill ratio of 15% (V/V).Under the conditions of 75 mg/L influent ammonia,hydraulic retention time (HRT) of 3.7-5.6 hr,and dissolved oxygen (DO) of 4 mg/L,the effluent ammonia concentration was lower than 10 mg/L and the ammonia removal efficiency was 90%.While the highest ammonia removal rate,162 mg-N/(L-pellet·hr),was observed when the HRT was 1.3 hr. 关键词：水性聚氨酯硝化特性乙醇燃料生产废水玉米氨氮去除率氨氧化细菌原料

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Nitrification characteristics of nitrobacteria immobilized in waterborne polyurethane in wastewater of corn-based ethanol fuel production

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