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

• Published in: Biochemical engineering journal Vol. 68; pp. 215 - 220
• Main Authors: Zhu, Liang, Lv, Meile, Dai, Xin, Xu, Xiangyang, Qi, Hanying, Yu, Yanwen
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 15.10.2012; Elsevier
• 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; Biodegradation; Aerobic granule; Chloroaniline; Kinetic parameter; Bioreactors; Wastewater treatment; Bioreactor; Aniline; Kinetics; Waste water purification; Biological purification
• ISSN: 1369-703X; 1873-295X
• DOI: 10.1016/j.bej.2012.07.015

► 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.