Inderscience Publishers

Size-dependent microbial substrate uptake kinetics for aerobic granules

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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
max
/K
s
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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