Inderscience Publishers

Size-dependent microbial substrate uptake kinetics for aerobic granules

Biodegradation kinetics of aerobic granules determined by indirect method of resporimetric technique showed that it followed Monod kinetics, and the kinetic behaviour was size-dependent. It was further demonstrated that biodegradation kinetics was a surface reaction associated phenomenon. It shows that the affinity coefficient of biomass to substrate in terms of q
ratio (specific maximum biodegradation rate/Monod constant) is linearly related to the specific surface area of granules. Thus, smaller granules with larger surface area had a fast biodegradation rate. This study demonstrated that the biodegradation kinetics of aerobic granules is mainly a surface reaction mechanism.

Keywords: aerobic granules, biodegradation rate, biokinetics, granule size, surface reaction, biodegradation kinetics

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