caa a22 4500 605498466 CHVBK 20210128100546.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00253-015-6585-2 doi (NATIONALLICENCE)springer-10.1007/s00253-015-6585-2 Re-acclimation performance and microbial characteristics of a thermophilic biofilter for NOx removal from flue gas [Elektronische Daten] [Shihan Zhang, Han Chen, Yinfeng Xia, Jingkai Zhao, Nan Liu, Wei Li] Currently, a novel chemical absorption-biological reduction (CABR) integrated process, employing Fe(II)EDTA as a solvent, is being under development to reduce the cost of NOx removal from flue gas. In this work, the NO removal profile, re-acclimation performance, and microbial characteristics in a thermophilic biofilter were investigated at the conditions typical to CABR process. The biofilter comprised of four layers of packing material with a surface area of 1200m2m−3. Experimental results revealed that the biofilter could remove 95% of the fed NO at typical flue gas conditions. As the gas residence time varied from 90 to 15s, the NO removal efficiency decreased from 100 to 56.5% due to the NO mass transfer limitation. The longer period of the biofilter shutdown required more time for its re-acclimation. For example, after 8-day shutdown, the biofilter was re-acclimated in 32h. Denaturing gradient gel electrophoresis analysis of PCR-amplified product showed that Pseudomonas, a group of denitrifier, was dominant in the biofilter. Because the Pseudomonas was abundant at the bottom layer of packed-bed, the bottom layer contributed to 60-70% of the total NO removal. In addition, Pseudomonas gradually faded away along the gas flow path from the bottom to the top of biofilter, resulting in a significant decrease in NO removal at the other three packed-bed layers. These observed results will provide the process engineering and scale-up data with respect to the biofilter operations to help advance the CABR process to pilot-scale testing. Springer-Verlag Berlin Heidelberg, 2015 NOx removal nationallicence CABR nationallicence Re-acclimation nationallicence Flue gas nationallicence Microbial community nationallicence Zhang Shihan Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut Chen Han Institute of Environmental Engineering, Zhejiang University, Zijingang Campus, 310058, Hangzhou, China aut Xia Yinfeng Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut Zhao Jingkai Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut Liu Nan Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut Li Wei Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/16(2015-08-01), 6879-6887 0175-7598 99:16<6879 2015 99 253 https://doi.org/10.1007/s00253-015-6585-2 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00253-015-6585-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Shihan Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut NATIONALLICENCE 700 1- Chen Han Institute of Environmental Engineering, Zhejiang University, Zijingang Campus, 310058, Hangzhou, China aut NATIONALLICENCE 700 1- Xia Yinfeng Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut NATIONALLICENCE 700 1- Zhao Jingkai Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut NATIONALLICENCE 700 1- Liu Nan Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut NATIONALLICENCE 700 1- Li Wei Key Laboratory of Biomass Chemical Engineering of Ministry of Education, Institute of Industrial Ecology and Environment, College of Chemical and Biological Engineering, Zhejiang University, Yuquan Campus, 310027, Hangzhou, China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/16(2015-08-01), 6879-6887 0175-7598 99:16<6879 2015 99 253