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《Journal of Jilin University(Earth Science Edition)》 2006-04
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Effects of RTD on NH_4-N Removal of Inner Loop Three-Phase Biological Fluidized Bed Reactor

JIANG Nan~(1,2),MA Xiao-fan~1,WANG He-li~(1,2)1.College of Environment and Resources,Jilin University,Changchun 130023,China2.School of Water Resource and Environment,China University of Geosciences, Beijing 100083,China  
Hydraulic Residence Time Distributions(RTDs) in an inner loop three-phase biological fluidized bed reactor were measured under different flow regimes using pulse stimulus-response technique method.The number of tank-in-series measured was approximately 1 in aerobic area of the reactor,therefore the reactor can be seen as a Continued Stirred Tank Reactor(CSTR).By comparing different Hydraulic Retention Time(HRT),the authors found that at HRT of 1.5 h,the capacity usage reached the optimum level.Meanwhile the maximum NH_4-N removal efficiency,more than 90%,was also obtained when HRT was 1.5 h The results validates the reliability of RTD test and provides the basis of sizing and scaling up of the reactor.
【Fund】: 吉林省科技发展计划项目(20010419)
【CateGory Index】: X703.3
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