A methodology for optimising feed composition for anaerobic co-digestion of agro-industrial wastes
Sus scrofa
Fishes
0211 other engineering and technologies
Industrial Waste
Agriculture
02 engineering and technology
Refuse Disposal
12. Responsible consumption
Manure
Kinetics
Biodegradation, Environmental
Bioreactors
Biofuels
0202 electrical engineering, electronic engineering, information engineering
Animals
Anaerobiosis
Methane
DOI:
10.1016/j.biortech.2009.09.061
Publication Date:
2009-10-15T08:29:10Z
AUTHORS (3)
ABSTRACT
An optimisation protocol for maximising methane production by anaerobic co-digestion of several wastes was carried out. A linear programming method was utilised to set up different blends aimed at maximising the total substrate biodegradation potential (L CH(4)/kg substrate) or the biokinetic potential (L CH(4)/kg substrate d). In order to validate the process, three agro-industrial wastes were considered: pig manure, tuna fish waste and biodiesel waste, and the results obtained were validated by experimental studies in discontinuous assays. The highest biodegradation potential (321 L CH(4)/kg COD) was reached with a mixture composed of 84% pig manure, 5% fish waste and 11% biodiesel waste, while the highest methane production rate (16.4 L CH(4)/kg COD d) was obtained by a mixture containing 88% pig manure, 4% fish waste and 8% biodiesel waste. Linear programming was proved to be a powerful, useful and easy-to-use tool to estimate methane production in co-digestion units where different substrates can be fed.
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