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Effect of trace element supplementation on the mesophilic anaerobic digestion of foodwaste in batch trials: The influence of inoculum origin

Paper ID Volume ID Publish Year Pages File Format Full-Text
3444 171 2013 7 PDF Available
Title
Effect of trace element supplementation on the mesophilic anaerobic digestion of foodwaste in batch trials: The influence of inoculum origin
Abstract

Batch anaerobic trials using a source-separated food waste as a substrate with inoculums of different origins were carried out under mesophilic conditions. Reactions were operated both with and without trace element (Co, Mo, Ni, Se, and W) supplementation. Supplementation with trace metals had either neutral or slightly negative effects with inoculums originating from reactors with a high background level of metals, such as those for the co-digestion of biowaste and waste activated sludge. For inoculums from reactors treating food waste only, which inherently contain low levels of trace metals, supplementation with these metals increased methane production. In particular, Mo concentrations in the range of 3–12 mg/kg dry matter and Se concentrations of 10 mg/kg dry matter increased methane production to as high as 30–40%. Supplementation with a metal mixture (Co, Mo, Ni, Se and W) increased the methane production to the range 45–65% for inoculums with low background concentrations of trace metals. These findings may have an important impact in the commercial production of methane from food waste.

► The lack of trace elements may upset the anaerobic digestion process. ► The supplementation of Co, Mo, Ni, Se, W showed a process improvement. ► Mo showed to be the most beneficial element added.

Keywords
Anaerobic digestion; Food waste; Inoculum; Mesophilic; Trace elements
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Effect of trace element supplementation on the mesophilic anaerobic digestion of foodwaste in batch trials: The influence of inoculum origin
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 70, 15 January 2013, Pages 71–77
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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