caa a22 4500 605505748 CHVBK 20210128100623.0 cr unu---uuuuu 210128e20151101xx s 000 0 eng 10.1007/s00253-015-6742-7 doi (NATIONALLICENCE)springer-10.1007/s00253-015-6742-7 N2O accumulation from denitrification under different temperatures [Elektronische Daten] [Leong Poh, Xie Jiang, Zhongbo Zhang, Yu Liu, Wun Ng, Yan Zhou] The effects of temperature on nitrous oxide (N2O) accumulation during denitrification and denitritation were investigated. Batch experiments were performed to measure N2O accumulation at 25 and 35°C. More N2O accumulation was observed during denitritation at the higher temperature as compared with full denitrification and low temperature tests. The highest nitrite concentration tested in this study (25mg/L NO2 −N and pH 8.0) did not show inhibitory effect on N2O reduction. It was found that the major cause of more N2O accumulation during denitrification at higher temperature was due to higher N2O production rate and lower N2O solubility. Specific nitrate, nitrite, and N2O reduction rates increased 62, 61, and 41%, respectively, when temperature rose from 25 to 35°C. The decrease of N2O solubility in mixed liquor at 35°C (when compared to 25°C) resulted in faster diffusing rate of N2O from liquid to gas phase. It was also more difficult for gas phase N2O to be re-dissolved. The diffused N2O was then accumulated in the headspace, which was not available for denitrification by denitrifiers. The results of this study suggest higher temperature may worsen N2O emission from wastewater treatment plants (WWTPs). Springer-Verlag Berlin Heidelberg, 2015 Nitrous oxide (N2O) nationallicence Denitrification nationallicence Temperature nationallicence Greenhouse gas nationallicence Wastewater treatment nationallicence Poh Leong Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut Jiang Xie Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut Zhang Zhongbo DHI Water & Environment (S) Pte. Ltd., 1 Cleantech Loop, CleanTech One, #03-05, 637141, Singapore, Singapore aut Liu Yu Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut Ng Wun Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut Zhou Yan Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/21(2015-11-01), 9215-9226 0175-7598 99:21<9215 2015 99 253 https://doi.org/10.1007/s00253-015-6742-7 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/s00253-015-6742-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Poh Leong Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut NATIONALLICENCE 700 1- Jiang Xie Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut NATIONALLICENCE 700 1- Zhang Zhongbo DHI Water & Environment (S) Pte. Ltd., 1 Cleantech Loop, CleanTech One, #03-05, 637141, Singapore, Singapore aut NATIONALLICENCE 700 1- Liu Yu Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut NATIONALLICENCE 700 1- Ng Wun Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut NATIONALLICENCE 700 1- Zhou Yan Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI), Nanyang Technological University, 1 Cleantech Loop, CleanTech One, #06-08, 637141, Singapore, Singapore aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/21(2015-11-01), 9215-9226 0175-7598 99:21<9215 2015 99 253