Cost assessment of centralizing a swine manure and corn stover co-digestion system for biogas production

Date
2021-01-01
Authors
Raman, D.
Myers, Gabrielle
Andersen, Daniel
Raman, D. Raj
Andersen, Daniel
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Altmetrics
Authors
Research Projects
Organizational Units
Journal Issue
Series
Department
Agricultural and Biosystems EngineeringCenter for Biorenewable Chemicals
Abstract

Iowa's livestock produces over 50 million tons of wet-basis manure each year. Biogas production from the manure can provide additional income to farmers, reduce greenhouse gas emissions, control odors, and provide a renewable energy source. Despite these benefits, biogas production is rarely deployed at swine farms. In this work, we explore the system economics to understand better the reasons for low deployment, as well as the benefits that might be realized via several additional steps, including: (1) cleaning and injection into the natural gas grid, (2) amending manure with biomass, and (3) digester centralization. Specifically, we present a static, spreadsheet-based techno-economic model that allows examining these scenarios and combinations thereof. We also present our results and the uncertainties therein. This work shows that under the model assumptions, distributed, farm-scale digesters are not competitive with natural gas prices in Iowa, while some centralized production scenarios can be competitive, providing that fertilizer value and RIN credits are sufficiently high.

Comments

This conference presentation is published as Myers, Gabrielle M., Daniel S. Andersen, and D. Raj Raman. "Cost assessment of centralizing a swine manure and corn stover co-digestion system for biogas production." ASABE Paper No. 2100888. ASABE Annual International Meeting, July 12-16, 2021. DOI: 10.13031/aim.202100888. Posted with permission.

Description
Keywords
Citation
DOI