Co-digestion of cow manure, food waste and intermittent input of fat

Pulses of fat were added to completely mixed reactors fed with dairy cow manure (CM) and food waste (FW). After achieving a stable performance at an organic loading rate (OLR) of 4.6± 0.1 gCOD/(Lreactor.day), an oily effluent (OE) from a canned fish processing industry was fed in the form of pulses,...

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Bibliographic Details
Main Author: Neves, L. (author)
Other Authors: Oliveira, Rosário (author), Alves, M. M. (author)
Format: conferencePaper
Language:eng
Published: 2008
Subjects:
Anaerobic digestion
Biogas
Cow manure
Food waste
Lipids
Oily effluent
Online Access:http://hdl.handle.net/1822/26237
Country:Portugal
Oai:oai:repositorium.sdum.uminho.pt:1822/26237
Description
Summary:Pulses of fat were added to completely mixed reactors fed with dairy cow manure (CM) and food waste (FW). After achieving a stable performance at an organic loading rate (OLR) of 4.6± 0.1 gCOD/(Lreactor.day), an oily effluent (OE) from a canned fish processing industry was fed in the form of pulses, raising the lipids concentration up to 9, 12, 15 and 18 gCODfat/Lreactor. The highest fat concentration of 18gCODfat/Lreactor promoted a reversible inhibition in the methane production. All the other pulses had a positive effect in the methane production. From a practical point of view, this work demonstrates that controlled intermittent inputs of fat can enhance the methane production in the co-digestion of CM and FW.

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