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Performance of rotating drum biofilter for volatile organic compound removal at high organic loading rates
作者姓名:YANG Chunping  CHEN Hong  ZENG Guangming  ZHU Xueqing  SUIDAN Makram T
作者单位:YANG Chunping(College of Environmental Science and Engineering,Hunan University,Changsha 410082,China) ; CHEN Hong(College of Environmental Science and Engineering,Hunan University,Changsha 410082,China) ; ZENG Guangming(College of Environmental Science and Engineering,Hunan University,Changsha 410082,China) ; ZHU Xueqing(Department of Civil and Environmental Engineering,University of Cincinnati,Cincinnati,OH 45221-0071,USA) ; SUIDAN Makram T(Department of Civil and Environmental Engineering,University of Cincinnati,Cincinnati,OH 45221-0071,USA) ;
基金项目:国家自然科学基金,the Program for New Century Excellent Talents in University from the Ministry of Education of China,the University of Cincinnat U.S.Army Construction Engineering Research Laboratoty
摘    要:Uneven distribution of volatile organic compounds (VOCs) and biomass, and excess biomass accumulation in some biofilters hinder the application of biofiltration technology. An innovative multilayer rotating drum biofilter (RDB) was developed to correct these problems. The RDB was operated at an empty bed contact time (EBCT) of 30 s and a rotational rate of 1.0 r/min. Diethyl ether was chosen as the model VOC. Performance of the RDB was evaluated at organic loading rates of 32,1, 64.2, 128, and 256 g ether/(m^3·h) (16.06 g ether/(m^3·h) ≈ 1.0 kg chemical oxygen demand (COD)/(m^3·d)). The EBCT and organic loading rates were recorded on the basis of the medium volume. Results show that the ether removal efficiency decreased with an increased VOC loading rate. Ether removal efficiencies exceeding 99% were achieved without biomass control even at a high VOC loading rate of 128 g ether/(m^3·h). However, when the VOC loading rate was increased to 256 g ether/(m^3·h), the average removal efficiency dropped to 43%. Nutrient limitation possibly contributed to the drop in ether removal efficiency. High biomass accumulation rate was also observed in the medium at the two higher ether loading rates, and removal of the excess biomass in the media was necessary to maintain stable performance. This work showed that the RDB is effective in the removal of diethyl ether from waste gas streams even at high organic loading rates. The results might help establish criteria for designing and operating RDBs.

关 键 词:生物过滤  游击堆积物  转鼓式生物过滤器  有机混合物
收稿时间:2007-05-27
修稿时间:2007-07-15

Performance of rotating drum biofilter for volatile organic compound removal at high organic loading rates
YANG Chunping,CHEN Hong,ZENG Guangming,ZHU Xueqing,SUIDAN Makram T.Performance of rotating drum biofilter for volatile organic compound removal at high organic loading rates[J].Journal of Environmental Sciences,2008,20(3):285-290.
Authors:YANG Chunping  CHEN Hong  ZENG Guangming  ZHU Xueqing and SUIDAN Makram T
Institution:1. College of Environmental Science and Engineering,Hunan University,Changsha 410082,China
2. Department of Civil and Environmental Engineering,University of Cincinnati,Cincinnati,OH 45221-0071,USA
Abstract:Uneven distribution of volatile organic compounds (VOCs) and biomass, and excess biomass accumulation in some biofilters hinder the application of biofiltration technology. An innovative multilayer rotating drum biofilter (RDB) was developed to correct these problems. The RDB was operated at an empty bed contact time (EBCT) of 30 s and a rotational rate of 1.0 r/min. Diethyl ether was chosen as the model VOC. Performance of the RDB was evaluated at organic loading rates of 32.1, 64.2, 128, and 256 g ether/(m3 x h) (16.06 g ether/(m3 x h) approximately 1.0 kg chemical oxygen demand (COD)/(m3 x d)). The EBCT and organic loading rates were recorded on the basis of the medium volume. Results show that the ether removal efficiency decreased with an increased VOC loading rate. Ether removal efficiencies exceeding 99% were achieved without biomass control even at a high VOC loading rate of 128 g ether/(m3 x h). However, when the VOC loading rate was increased to 256 g ether/(m3 x h), the average removal efficiency dropped to 43%. Nutrient limitation possibly contributed to the drop in ether removal efficiency. High biomass accumulation rate was also observed in the medium at the two higher ether loading rates, and removal of the excess biomass in the media was necessary to maintain stable performance. This work showed that the RDB is effective in the removal of diethyl ether from waste gas streams even at high organic loading rates. The results might help establish criteria for designing and operating RDBs.
Keywords:biofiltration  organic loading  rotating drum biofilter (RDB)  volatile organic compound
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