Kinetics of soluble microbial product formation in substrate-sufficient batch culture of activated sludge |
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| Authors: | Liu Y Rols J-L |
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| Institution: | (1) School of Civil and Structural Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798,;(2) Centre d'Ecologie des Systèmes Aquatiques Continentaux, UMR-CNRS C5576, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 4, France, |
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| Abstract: | The kinetics of soluble microbial product (SMP) formation under substrate-sufficient conditions appear to exhibit different
patterns from substrate-limited cultures. However, energy spilling-associated SMP formation is not taken into account in the
existing kinetic models and classification of SMP. Based on the concepts of growth yield and energy uncoupling, a kinetic
model describing energy spilling-associated SMP formation in relation to the ratio of initial substrate concentration to initial
biomass concentration (S
0/X
0) was developed for substrate-sufficient batch culture of activated sludge, and was verified by experimental data. The specific
rate of energy spilling-associated SMP formation showed an increasing trend with the S
0/X
0 ratio up to its maximum value. The SMP productivity coefficient (α
p/e) was defined from the model on the basis of energy spilling-associated substrate consumption. Results revealed that less
than 5% of energy spilling-associated substrate consumption was converted into SMP.
Electronic Publication |
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| Keywords: | |
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