caa a22 4500 605504148 CHVBK 20210128100614.0 cr unu---uuuuu 210128e20150401xx s 000 0 eng 10.1007/s00253-014-6340-0 doi (NATIONALLICENCE)springer-10.1007/s00253-014-6340-0 Effects of constant pH and unsteady pH at different free ammonia concentrations on shortcut nitrification for landfill leachate treatment [Elektronische Daten] [Chaosheng Zhang, Shaoqing Zhang, Liqiu Zhang, Hongwei Rong, Kefang Zhang] On the basis of achieving shortcut nitrification in a lab-scale SBR, the effects of constant pH and unsteady pH at different free ammonia concentrations on shortcut nitrification for landfill leachate treatment was investigated. The results indicate that under the condition of DO of 0.5 ± 0.2mg/L and temperature of 30 ± 2°C, the absolute value of nitrite accumulation increased significantly with the increase in free ammonia (FA) concentration from 5.30 to 48.67mg/L; however, the nitrite accumulation rate remained almost constant at a constant pH of 8.0 ± 0.1. Ammonia oxidation and the nitrite accumulation become slow with the pH decreased from 8.0 ± 0.1 to 7.5 ± 0.2, and the activities of ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) were severely inhibited when the pH further decreased to 6.5. More importantly, this study confirmed that the pH decrease from 8.0 to 6.5 within a short time exhibited significant negative effect on the ammonia oxidation rather than the FA concentration. Springer-Verlag Berlin Heidelberg, 2015 pH nationallicence Shortcut nitrification nationallicence Landfill leachate nationallicence Ammonia oxidation nationallicence Nitrite accumulation rate nationallicence Zhang Chaosheng School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut Zhang Shaoqing School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut Zhang Liqiu School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut Rong Hongwei School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut Zhang Kefang School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/8(2015-04-01), 3707-3713 0175-7598 99:8<3707 2015 99 253 https://doi.org/10.1007/s00253-014-6340-0 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/s00253-014-6340-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Chaosheng School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Shaoqing School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Liqiu School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Rong Hongwei School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Kefang School of Civil Engineering, Guangzhou University, 510006, Guangzhou, People's Republic of China aut NATIONALLICENCE 773 0- Applied Microbiology and Biotechnology Springer Berlin Heidelberg 99/8(2015-04-01), 3707-3713 0175-7598 99:8<3707 2015 99 253