caa a22 4500 606170170 CHVBK 20210128100715.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s10098-015-0979-9 doi (NATIONALLICENCE)springer-10.1007/s10098-015-0979-9 Impact of carbon sources on nitrous oxide emission and microbial community structure in an anoxic/oxic activated sludge system [Elektronische Daten] [Kang Song, Willie Harper Jr., Tomoyuki Hori, Shohei Riya, Masaaki Hosomi, Akihiko Terada] The carbon source used for denitrification is a key factor in the reduction of nitrous oxide (N2O) produced from wastewater treatment plants because it affects denitrification activity. In this study, two laboratory-scale Modified Ludzak Ettinger (MLE) processes were operated with methanol and sodium acetate as the sole carbon sources. Removal efficiency of soluble nitrogen was not affected by carbon source, but the N2O emission rate from the acetate-fed MLE process (1.6±0.6μgN-N2O/min) was lower than that from the methanol-fed process (3.0±0.7μgN-N2O/min). This is supported by the batch experiment data showing the acetate-fed biomass had a higher N2O reduction rate of 10.3mg/gVSS/h than that of the methanol-fed biomass (3.3mg/gVSS/h). In the methanol-fed process, 34.9% of the total bacteria was the genus Methylotenera, which is reportedly incapable of N2O reduction. The acetate-fed process enriched the genera Dechloromonas and Rubrivivax, potential N2O reducers, accounting for 12.2 and 15.9% of the total bacteria, respectively. The results indicated that acetate is a suitable replacement for methanol for wastewater treatment plants interested in mitigating N2O emission from the MLE process. Springer-Verlag Berlin Heidelberg, 2015 Nitrous oxide nationallicence N2O reduction rate nationallicence Methanol nationallicence Acetate nationallicence nosZ nationallicence Community structure nationallicence Song Kang Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut Harper Jr. Willie Department of Systems Engineering and Management, Air Force Institute of Technology, Wright-Patterson Air Force Base, 45433, Dayton, OH, USA aut Hori Tomoyuki Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST), 305-8569, Tsukuba, Japan aut Riya Shohei Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut Hosomi Masaaki Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut Terada Akihiko Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/8(2015-12-01), 2375-2385 1618-954X 17:8<2375 2015 17 10098 https://doi.org/10.1007/s10098-015-0979-9 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/s10098-015-0979-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Song Kang Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut NATIONALLICENCE 700 1- Harper Jr Willie Department of Systems Engineering and Management, Air Force Institute of Technology, Wright-Patterson Air Force Base, 45433, Dayton, OH, USA aut NATIONALLICENCE 700 1- Hori Tomoyuki Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology (AIST), 305-8569, Tsukuba, Japan aut NATIONALLICENCE 700 1- Riya Shohei Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut NATIONALLICENCE 700 1- Hosomi Masaaki Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut NATIONALLICENCE 700 1- Terada Akihiko Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka, 184-8588, Koganei, Tokyo, Japan aut NATIONALLICENCE 773 0- Clean Technologies and Environmental Policy Springer Berlin Heidelberg 17/8(2015-12-01), 2375-2385 1618-954X 17:8<2375 2015 17 10098