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Biogas Production and Digestate Quality of Diet-Influenced Food Waste after Anaerobic Digestion

Mullins, Emily Ann
http://orcid.org/0000-0002-9263-200X
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620125389516066

Abstract Details

2021, Master of Science (MS), Ohio University, Environmental Studies (Voinovich).
Anaerobic digestion (AD) is increasingly becoming a sustainable waste management strategy in the United States. Food waste (FW) composition varies with dietary choices and can affect the amount and quality of products from AD. Human dietary management persists as obesity rises nationally, but there is little knowledge regarding the effect of diets on FW composition, potential energy generation from different wastes, and secondary products. The objective of this research is to characterize the biogas production and digestate quality of anaerobically digested food wastes. Food wastes from four distinct diets were compared in lab-scale anaerobic digestion vessels: paleolithic, ketogenic, vegetarian, and omnivorous diets. Food was collected to mimic the proportional wastes for each diet and then digested with healthy digester effluent as an inoculum in replicated lab-scale AD vessels. Waste products were characterized by measuring biomethane yield, and the nitrogen and phosphorus nutrients found in the effluent after digestion. Results suggest that the AD of FW from the ketogenic diet would result in biogas with 317% greater methane than the reference omnivorous diet, while the digestate of the paleolithic diet contained 80% greater concentration of phosphorus. All alternative diets resulted in a digestate with lower nitrogen (-13% on average) than the omnivorous diet.
Sarah Davis (Advisor)
Damilola Daramola (Committee Member)
Dane Salabak (Committee Member)
Kimberley Miller (Other)
54 p.
Environmental Studies
anaerobic digestion; food waste; waste; bioenergy; diet

Recommended Citations

Citations

  • Mullins, E. A. (2021). Biogas Production and Digestate Quality of Diet-Influenced Food Waste after Anaerobic Digestion [Master's thesis, Ohio University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620125389516066

    APA Style (7th edition)

  • Mullins, Emily. Biogas Production and Digestate Quality of Diet-Influenced Food Waste after Anaerobic Digestion. 2021. Ohio University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620125389516066.

    MLA Style (8th edition)

  • Mullins, Emily. "Biogas Production and Digestate Quality of Diet-Influenced Food Waste after Anaerobic Digestion." Master's thesis, Ohio University, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1620125389516066

    Chicago Manual of Style (17th edition)

ohiou1620125389516066
496
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This open access ETD is published by Ohio University and OhioLINK.