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《Environmental Science & Technology》 2010-11
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Performance of Nitrogen Removal Load in ANAMMOX Biofilm Reactor

LI Xiang1,HUANG Yong1,YUAN Yi1,2 (1.School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215011,China;2.School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China)  
Effect of increasing NRL on nitrogen removal efficiency was investigated by means of increasing substrate concentrations and decreasing HRT in lab scale ANAMMOX biofilm reactors.Experiment was started at initial nitrogen removal efficiency of 2.11kgN/(m3·d) with nitrogen removal of 87.9%.Total nitrogen removal rate of 4.0kgN/m3·d was obtained by increasing substrate concentrations from 300mg/L to 700mg/L,with effluent NH4+-N and NO2--N concentrations of 70mg/L and 100mg/L after 50days,with effluent NH4+-N and NO2--N concentrations of 70mg/L and 100mg/L respectively.Total nitrogen removal rate of 7.0kgN/(m3·d) was obtained by shortening HRT from 3h to 0.67h after 55days,with effluent NH4+-N and NO2--N concentrations of 40mg/L and 60mg/L respectively.Results also showed that increase of free ammonia and NO2--N concentrations due to increase of substrate concentrations to certain extent will inhibit activity of ANAMMOX bacteria.Shorter HRT was in favor of improving nitrogen removal under the same NLR compared with higher influent substrate concentrations.The sludge may be washed out when influent flow was rapid.
【Fund】: 江苏省环境科学与工程重点实验室开放课题(ZD081202);; 江苏省环境工程重点学科基础研究(A0030702)
【CateGory Index】: X703
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