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Anaerobic co-digestion of sewage sludge and grease trap: Assessment of enzyme addition

Paper ID Volume ID Publish Year Pages File Format Full-Text
34746 45042 2013 5 PDF Available
Title
Anaerobic co-digestion of sewage sludge and grease trap: Assessment of enzyme addition
Abstract

•Grease trap (GT) is an important solid waste in WWTPs.•Enzyme-lipase application, both addition and dosage, were evaluated.•Enzyme addition improved notably the biogas production at different GT fractions.•First order model is capable to describe the co-digestion process.

Anaerobic co-digestion of grease trap and sewage sludge from a wastewater treatment plant is evaluated. Enzyme-lipase application, both addition and dosage, are evaluated by fitting the methane production of biochemical potential tests with the first order model. The enzyme addition effect, at 2, 5 and 10% of grease trap (%GT VSFED−1) and the enzymes doses, between 0.25 and 1.67% (v/v), without and with grease trap presence were studied. Grease trap addition showed a negative effect on the waste biodegradability, which was completely overcome by the addition of lipase. Enzyme addition improved notably the methane production for all grease trap fractions studied. In regards to the dosage, the best result was achieved between 0.33 and 0.83% (v/v) of enzyme. The co-digestion of sewage sludge and grease trap may be a feasible process by using lipases due to the saving in operational costs and the increase in the biogas production

Keywords
Co-digestion; Grease trap; Lipase; Methane; Modeling; Sewage sludge
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Anaerobic co-digestion of sewage sludge and grease trap: Assessment of enzyme addition
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 48, Issues 5–6, May–June 2013, Pages 936–940
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
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us