Contrast Experimental Studies on Mesophilic and Thermophilic Anaerobic Digestion of Residual Activated Sludge

Guo De Li; Na Li

doi:10.4028/www.scientific.net/AMR.396-398.1932

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 396-398Contrast Experimental Studies on Mesophilic and...

Contrast Experimental Studies on Mesophilic and Thermophilic Anaerobic Digestion of Residual Activated Sludge

Abstract:

In order to study the reducing and reusing of residual sludge from municipal wastewater treatment plant and solve the technical limit for traditional anaerobic digestion, the contrast research was carried out between the mesophilic(33 °C) and thermophilic(57 °C) anaerobic digestion. The results show that the thermophilic digestive efficiency is one time bigger than mesophilic. When sludge dosage rate increased, volatile fatty acid concentration rises sharply and pH drooped; When the reaction becomes stable, the volatile fatty acid concentration begins to be lowered, the corresponding pH rise gradually. At each sludge dosage rate, the alkalinity drops firstly and then increases with the reaction carried on. Furthermore, the fluctuation of pH values, VFA and the alkalinity of thermophilic are less than that of mesophilic for different sludge dosage.

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Advanced Materials Research (Volumes 396-398)

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1932-1935

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https://doi.org/10.4028/www.scientific.net/AMR.396-398.1932

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November 2011

Authors:

Guo De Li, Na Li

Keywords:

Anaerobic Digestion, Mesophilic, Thermophilic, Waste Activated Sludge, Wastewater Treatment Plant

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