Removal of H2S by co-immobilized bacteria and fungi biocatalysts in a bio-trickling filter |
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| Authors: | Chunjing Liu Jia Liu Jian Li Hong He Shujing Peng Chao Li Ying Chen |
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| Affiliation: | 1. School of Municipal and Environmental Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;2. Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi’an University of Architecture and Technology, Xi’an 710055, China;3. China Gezhouba Dam Group Water Operation Co., Ltd, Wuhan 430000, China;2. Department of Chemical Engineering and Environmental Technology, University of Valladolid, Dr. Mergelina s/n, 47011 Valladolid, Spain;3. CONACYT – Laboratory for Research on Advanced Processes for Wastewater Treatment, Engineering Institute, Juriquilla Academic Unit, National Autonomous University of Mexico (UNAM), Blvd. Juriquilla 3001, Querétaro 76230, Mexico;1. Department of Chemical Engineering, School of Engineering, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain;2. Department of Mining Engineering and Natural Resources, Universitat Politècnica de Catalunya, Bases de Manresa 61-73, 08240 Manresa, Spain;3. Department of Genetics and Microbiology, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain;4. Department of Chemistry, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain;1. College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, PR China;2. Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, Hunan 410082, PR China;3. Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, College of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou, Zhejiang 310018, PR China |
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| Abstract: | Biological control of odor gases has gained more attention in recent years. In this study, removal performance of a vertical bio-trickling filter inoculated with bacteria and fungi was studied. Bacteria and fungi were isolated from activated sludge in a sewage treatment plant. By adopting “three step immobilization method”, the bio-trickling filter could degrade pollutant immediately once hydrogen sulfide (H2S) passed. The optimal empty bed resident time was 20 s. The optimal elimination capacity was about 60 g H2S m?3 h?1 with removal efficiency of 95%. And the maximum elimination capacity was 170 g H2S m?3 h?1. Pressure drop was ranged between 5 and 15 mm H2O per bed over the whole operation. Removal efficiency was not affected obviously after terminating nutrient supply. The bio-trickling filter could recover back after shut down H2S gaseous and liquid supplies simultaneously. Microbial community structure in the bio-trickling filter was not changed significantly.Combining bacteria and fungi would be a better choice for inoculation into a bio-trickling filter because of the quickly degradation of H2S and rapid recovery under shut-down experiment. This is the first study attempting to combine bacteria and fungi for removal of H2S in a bio-trickling filter. |
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