標題: Operational characteristics of effective removal of H2S and NH3 waste gases by activated carbon biofilter
作者: Chung, YC
Lin, YY
Tseng, CP
生物科技學系
Department of Biological Science and Technology
公開日期: 1-Apr-2004
摘要: Simultaneous removal of hydrogen sulfide (H,S) and ammonia (NH3) gases from gaseous streams was studied in a biofilter packed with granule activated carbon. Extensive studies, including the effects of carbon (C) source on the growth of inoculated microorganisms and gas removal efficiency, product analysis, bioaerosol emission, pressure drop, and cost evaluation, were conducted. The results indicated that molasses was a potential C source for inoculated cell growth that resulted in removal efficiencies of 99.5% for H2S and 99.2% for NH3. Microbial community observation by scanning electron microscopy indicated that granule activated carbon was an excellent support for microorganism attachment for long-term waste gas treatment. No disintegration or breakdown of biofilm was found when the system was operated for 140 days. The low bioaerosol concentration emitted from the biofilter showed that the system effectively avoided the environmental risk of bioaerosol emission. Also, the system is suitable to apply in the field because of its low pressure drop and treatment cost. Because NH3 gas was mainly converted to organic nitrogen, and H2S gas was converted to elemental sulfur, no acidification or alkalinity phenomena were found because of the metabolite products. Thus, the results of this study demonstrate that the biofilter is a feasible bioreactor in the removal of waste gases.
URI: http://hdl.handle.net/11536/26886
ISSN: 1047-3289
期刊: JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
Volume: 54
Issue: 4
起始頁: 450
結束頁: 458
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