PMID: 20108659Jan 30, 2010Paper

Kinetic analysis of waste activated sludge hydrolysis and short-chain fatty acids production at pH 10

Journal of Environmental Sciences (China)
Leiyu FengYinguang Chen

Abstract

The accumulation of short-chain fatty acids (SCFAs), a preferred carbon source for enhanced biological phosphorus removal microbes, was significantly improved when waste activated sludge (WAS) was fermented at pH 10. The kinetics of WAS hydrolysis and SCFAs production at pH 10 was investigated. It was observed that during WAS anaerobic fermentation the accumulation of SCFAs was limited by the hydrolysis process, and both the hydrolysis of WAS particulate COD and the accumulation of SCFAs followed first-order kinetics. The hydrolysis and SCFAs accumulation rate constants increased with increasing temperature from 10 to 35 degrees C, which could be described by the Arrhenius equation. The kinetic data further indicated that SCFAs production at pH 10 was a biological process. Compared with the experiment of pH uncontrolled (blank test), both the rate constants of WAS hydrolysis and SCFAs accumulation at 20 degrees C were improved significantly when WAS was fermented at pH 10.

References

May 1, 1993·Biotechnology and Bioengineering·T ShimizuY Nasu

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Citations

Jun 18, 2015·Water Research·Muhammad A LatifDamien J Batstone
Oct 21, 2016·Environmental Science and Pollution Research International·U UshaniJ Rajesh Banu
Oct 20, 2018·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Haixia DuHuifang Wu

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