TY - GEN
T1 - Inhibitory effects of simultaneous chemical phosphorus removal on microbial activity in the unitank process
AU - Zhou, Zhen
AU - Chen, Ying
AU - Xing, Can
AU - Chen, Siwei
AU - Tong, Fei
AU - Wang, Junru
PY - 2013
Y1 - 2013
N2 - Fractionation of heterotrophic bacteria (HB), ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in a full-scale Unitank wastewater treatment plant (WWTP) were analyzed based on oxygen utilization rate (OUR) test, and the effect of simultaneous chemical phosphorus removal on microbial activity was investigated by adding aluminum sulfate and ferric chloride to activated sludge. Proportions of HB, AOB and NOB in the full-scale Unitank WWTP were 67.0%, 21.0% and 12.0%, respectively. 12.5mg Al3+ showed significant inhibition of microbial activity, and inhibitory ratios on HB, AOB and NOB were19.6%, 11.5% and 29.0%, respectively. Nevertheless, the inhibitory ratios of 13.8mg/L Fe3+ on HB, AOB and NOB were 4.1%, 5.5% and 4.8%, respectively. Al salt demonstrated much higher inhibitory effects on microbial activities than ferric salt, and the inhibition of Al salt on NOB is dominant in the nitrification process.
AB - Fractionation of heterotrophic bacteria (HB), ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) in a full-scale Unitank wastewater treatment plant (WWTP) were analyzed based on oxygen utilization rate (OUR) test, and the effect of simultaneous chemical phosphorus removal on microbial activity was investigated by adding aluminum sulfate and ferric chloride to activated sludge. Proportions of HB, AOB and NOB in the full-scale Unitank WWTP were 67.0%, 21.0% and 12.0%, respectively. 12.5mg Al3+ showed significant inhibition of microbial activity, and inhibitory ratios on HB, AOB and NOB were19.6%, 11.5% and 29.0%, respectively. Nevertheless, the inhibitory ratios of 13.8mg/L Fe3+ on HB, AOB and NOB were 4.1%, 5.5% and 4.8%, respectively. Al salt demonstrated much higher inhibitory effects on microbial activities than ferric salt, and the inhibition of Al salt on NOB is dominant in the nitrification process.
KW - Activated sludge
KW - Coagulant
KW - Inhibition
KW - Microbial activity
KW - Unitank
UR - https://www.scopus.com/pages/publications/84871915040
U2 - 10.4028/www.scientific.net/AMR.610-613.1672
DO - 10.4028/www.scientific.net/AMR.610-613.1672
M3 - 会议稿件
AN - SCOPUS:84871915040
SN - 9783037855508
T3 - Advanced Materials Research
SP - 1672
EP - 1675
BT - Progress in Environmental Science and Engineering
T2 - 2nd International Conference on Energy, Environment and Sustainable Development, EESD 2012
Y2 - 12 October 2012 through 14 October 2012
ER -