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Biogas Production, Waste Stabilization, and Microbial Community Physiological Changes during Anaerobic Co-digestion of Swine Manure and Corn Stover

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Title: Biogas Production, Waste Stabilization, and Microbial Community Physiological Changes during Anaerobic Co-digestion of Swine Manure and Corn Stover
Author: Arias, Daniel Elijah
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Gilroyed, Brandon
Abstract: This thesis is an investigation of the use of anaerobic co-digestion (AcoD) of swine manure (SM) and corn stover (CS) to produce biogas and reduce the environmental health risk of manure. Laboratory-scale mesophilic (38 °C) batch AcoD of different ratios of SM and CS were conducted to measure cumulative methane potential, organic matter reduction, hygienization efficiency, and microbial metabolic adaptation in response to increasing total solids (TS). The results revealed the highest methane potential and greatest organic matter reduction for SM mono-digestion. These same parameters were measured during long-term mesophilic AcoD in a semi-continuously fed auger plug-flow reactor (PFR), with a step-wise increase of organic loading rate (OLR) from 0.25- 4.7 kg volatile solids fed (VS) m-3 d-1. The results revealed the highest biogas potential and organic matter reduction at the lowest OLR. Hygienization efficiency was low in both experiments and lignocellulosic degradation increased in response to increased TS content.
URI: https://hdl.handle.net/10214/21172
Date: 2020-09
Rights: Attribution-NonCommercial-NoDerivatives 4.0 International
Terms of Use: All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
Related Publications: Arias, D.E., Veluchamy, C., Dunfield, K.E., Habash, M.B., Gilroyed, B.H., 2020. Hygienization and microbial metabolic adaptation during anaerobic co-digestion of swine manure and corn stover. Bioresour. Technol. 306, 123168. https://doi.org/10.1016/j.biortech.2020.123168.


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Attribution-NonCommercial-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivatives 4.0 International