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ARS Home » Midwest Area » Bowling Green, Kentucky » Food Animal Environmental Systems Research » Research » Publications at this Location » Publication #341427

Research Project: Developing Safe, Efficient and Environmentally Sound Management Practices for the Use of Animal Manure

Location: Food Animal Environmental Systems Research

Title: Biogas production from livestock waste anaerobic digesters: evaluation and optimization

item Lovanh, Nanh
item Loughrin, John
item RUIZ-AGUILAR, G.M.L. - University Of Guanajuato
item RYZS, MACIEJ - University Of Florida

Submitted to: American Society of Agronomy Meetings
Publication Type: Abstract Only
Publication Acceptance Date: 8/15/2017
Publication Date: 10/25/2017
Citation: Lovanh, N.C., Loughrin, J.H., Ruiz-Aguilar, G., Ryzs, M. 2017. Biogas production from livestock waste anaerobic digesters: evaluation and optimization. American Society of Agronomy Meetings. Poster No. 1239.

Interpretive Summary:

Technical Abstract: Livestock wastes can serve as the feedstock for biogas production (mainly methane) that could be used as alternative energy source. The green energy derived from animal wastes is considered to be carbon neutral and offsetting those generated from fossil fuels. However, feedstocks from livestock residues could be quite recalcitrant for biogas production during anaerobic digestion. In this study, an evaluation of system parameters on methane production from anaerobic digesters utilizing different livestock residues was carried out. Anaerobic batch reactors and continuous flow systems subjected to different operational conditions (i.e., flow rate, temperature, and etc.) containing poultry rendering wastewater were set up to evaluate methane potential from each scenario. Biogas productions were sampled and monitored by gas chromatography and photoacoustic gas analyzer over six months of operation. Mathematical simulations were carried out to optimize gas production. The results showed that methane productions increased as the temperature increased. However, there is an upper limit to the increase in the temperature on the methane production. Flow rates and type of systems (batch vs. plug-flow regime) also had a major effect on methane production. Constant biogas production was observed in plug-flow system whereas batch system produced biogas quicker and tapering off toward the end of the six-month study. Based on these results, it is paramount to consider operating conditions and system setup in optimizing biogas production from livestock residues, especially recalcitrant feedstocks.