Journal
BIORESOURCE TECHNOLOGY
Volume 94, Issue 1, Pages 69-81Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2003.10.034
Keywords
solids biodegradation; hydrolysis kinetics; food waste; one- and two-stage anaerobic digestion; initiation methanogenic centers; distributed mathematical model
Ask authors/readers for more resources
The hydrolysis rate coefficients of sorted municipal waste were evaluated from the biochemical methane potential tests using nonlinear regression. A distributed mathematical model of anaerobic digestion of rich (food) and lean (non-food) solid wastes with greatly different rates of polymer hydrolysis/acidogenesis was developed to describe the balance between the rates of hydrolysis/acidogenesis and methanogenesis. The model was calibrated using previously published experimental data [Biores. Technol. 52 (1995) 245] obtained upon various initial food waste loadings. Simulations of one- and two-stage digestion systems were carried out. The results showed that initial spatial separation of food waste and inoculum enhances methane production and waste degradation in a one-stage solid-bed digester at high waste loading. A negative effect of vigorously mixing at high waste loading reported in some papers was discussed. It was hypothesized that the initiation methanogenic centers developing in time and expanding in space under minimal mixing conditions might be a key factor for efficient anaerobic conversion of solid waste into methane. (C) 2003 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available