Reaction kinetics of the degradation of chloroanilines and aniline by aerobic granule

► Reaction kinetics of aniline and chloroanilines by aerobic granules are studied in this paper. ► Formation of aerobic granule favours enhancing the degradability of toxic organic compounds. ► Controlling granular diameter is important for optimising the performance of bioreactor. The reaction kine...

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Bibliographic Details
Published in:Biochemical engineering journal 2012-10, Vol.68, p.215-220
Main Authors: Zhu, Liang, Lv, Meile, Dai, Xin, Xu, Xiangyang, Qi, Hanying, Yu, Yanwen
Format: Article
Language:English
Subjects:
Aerobic granule
aniline
biodegradability
Biodegradation
Biological and medical sciences
Biological treatment of waters
Bioreactors
Biotechnology
Chloroaniline
Environment and pollution
equations
Fundamental and applied biological sciences. Psychology
granules
Industrial applications and implications. Economical aspects
Kinetic parameter
Methods. Procedures. Technologies
pollutants
reaction kinetics
thermodynamics
toxicity
Various methods and equipments
Wastewater treatment
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Summary:► Reaction kinetics of aniline and chloroanilines by aerobic granules are studied in this paper. ► Formation of aerobic granule favours enhancing the degradability of toxic organic compounds. ► Controlling granular diameter is important for optimising the performance of bioreactor. The reaction kinetics of the degradation of ClAs and AN by aerobic granules were studied in a stable sequencing airlift bioreactor (SABR). Results showed that the degradation of ClAs and AN by aerobic granules followed the Haldane equation. The maximum substrate degradation rates (Vmax) for different pollutants were as follows: AN>4-ClA>2-ClA>3-ClA>3,4-DClA, and the order of inhibition constant (Ki) was AN>3-ClA>4-ClA>2-ClA>3,4-DClA. The biodegradabilities of ClAs and AN was well relevance to their spatial parameters and thermodynamic coefficients. At the same time, the values of Vmax and Ki increased along with the granular diameter (peaked at 1.25–2.0mm), and then Ki increased but Vmax decreased. The results demonstrated that the formation of aerobic granule favours enhancing the degradability of toxic organic compounds, and controlling the granular diameter is important for optimising the performance of bioreactors.
ISSN:1369-703X
1873-295X
DOI:10.1016/j.bej.2012.07.015