WANG Jianhui, YIN Jun, LU Hai, et al. Sludge microbial kinetics in organic matter biodegradation and nitrification based on ETS activity[J]. CIESC Journal, 2014, (2): 672-678.
WANG Jianhui, YIN Jun, LU Hai, et al. Sludge microbial kinetics in organic matter biodegradation and nitrification based on ETS activity[J]. CIESC Journal, 2014, (2): 672-678.DOI: 10.3969/j.issn.0438-1157.2014.02.043.
The variation of electron transport system(ETS)activity during organic matter biodegradation and nitrification was studied to evaluate the feasibility of assessment of biological activity of activated sludge by ETS activity. The Michaelis - Menten equation was used to analyze the kinetics of organic matter oxidation and nitrification. The experimental result showed that ETS activity could reflect the reaction course of organic matter biodegradation and nitrification
and the changes in loading and alkalinity. Therefore
ETS activity could be used as a parameter for assessing the biological activity of activated sludge. The Michaelis constants were KsT=368.9 mg·L-1
UmT=90.9 mg TF·(g TSS·h)-1
KsI=88.42 mg·L-1
UmI=277.8 mg INTF·(g TSS·h)-1 during organic matter biodegradation. The Michaelis constants were KsT=16.89 mg·L-1
UmT=34.6 mg TF·(g TSS·h)-1
KsT=6.0 mg·L-1
UmI=196.08 mg INTF·(g TSS·h)-1 during nitrification. The results further showed that heterotrophic bacteria growth rate in biodegradation of organic matter was higher than autotrophic denitrifying bacteria growth rate in nitrification of organic matter.