caa a22 4500 605503427 CHVBK 20210128100610.0 cr unu---uuuuu 210128e20150701xx s 000 0 eng 10.1007/s00253-015-6449-9 doi (NATIONALLICENCE)springer-10.1007/s00253-015-6449-9 Fe0 enhanced acetification of propionate and granulation of sludge in acidogenic reactor [Elektronische Daten] [Yang Li, Yaobin Zhang, Xusheng Meng, Zhonghan Yu, Xie Quan] Acidogenic reactors commonly operated at short hydraulic retention times (HRT) are liable to cause low chemical oxygen demand (COD) removal and acidogenic efficiency especially under fluctuating feed. Granular sludge as an efficient form for anaerobic microbial community to resist shocks in methanogenic reactors has been widely investigated, which however was less focused in acidogenic reactors. Adding Fe0 in an acidogenic reactor with propionate as the substrate operated at HRT of 2h was found to enhance the propionate decomposition and sludge granulation in this study. When increasing the organic load and decreasing pH in the feed, the propionate conversion and COD removal in the reactor with Fe0 were higher than those in the control reactor. The sludge granulation was well developed in this reactor. Fe0 advanced the growth of homoacetogenic bacteria that consumed the hydrogen produced in acetification of propionate. The propionate-oxidizing bacteria and homoacetogenic bacteria grew together in the sludge to accelerate hydrogen transfer, which was an important reason for the enhanced propionate decomposition and sludge granulation in the acidogenesis. Springer-Verlag Berlin Heidelberg, 2015 Fe0 nationallicence Granular sludge nationallicence Acidogenesis nationallicence Homoacetogenic bacteria nationallicence Li Yang Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut Zhang Yaobin Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut Meng Xusheng Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut Yu Zhonghan Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut Quan Xie Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/14(2015-07-01), 6083-6089 0175-7598 99:14<6083 2015 99 253 https://doi.org/10.1007/s00253-015-6449-9 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/s00253-015-6449-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Yang Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Zhang Yaobin Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Meng Xusheng Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Yu Zhonghan Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 700 1- Quan Xie Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, 116024, Dalian, China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/14(2015-07-01), 6083-6089 0175-7598 99:14<6083 2015 99 253