IMPROVEMENT OF ANAEROBIC DIGESTION BY MECHANICAL PRETREATMENT " GRINDING "

Abstract

Thanks to the anaerobic digestion of sewage sludge, it is possible to produce a high-energy fuel called biogas. Methanation is an anaerobic fermentation or more precisely a biochemical process where the organic matter is degraded by the microorganisms in the absence of oxygen to be transformed in the end in to bio methane. The purpose of this work is to study the effect of mechanical pretreatment by grinding for grinding times varying from 1min to 15min. The parameters that indicate the solubilization were treated in this work: MES, MVS, soluble and total DCO the Ratio of the soluble DCO on total DCO, yield in biogas and in methane. This study allowed us to deduce:

- An improvement in methane production (3.8- 5.8) times greater than that of untreated sludge for a time equal to 14 days. A degree of solubility equal to 50% which corresponds to the test C1 = 5min.

 

Keywords

• Anaerobic digestion,Biogas,pretreatment

References

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