Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis

González, Rubén; Blanco, Daniel; Cascallana, José García; Carrillo-Peña, Daniela; Gómez, Xiomar

doi:10.3390/fermentation7040235

Open AccessArticle

Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis

by

Rubén González

¹

,

Daniel Blanco

¹,

José García Cascallana

¹,

Daniela Carrillo-Peña

²

and

Xiomar Gómez

^2,*

¹

Department of Applied Chemistry and Physics, Area of Chemical Engineering, Campus de Vegazana, University of León, 24071 León, Spain

²

Chemical and Environmental Bioprocess Engineering Group, Natural Resources Institute (IRENA), Department of Applied chemistry and Physics, University of León, Av. de Portugal 41, 24071 León, Spain

^*

Author to whom correspondence should be addressed.

Fermentation 2021, 7(4), 235; https://doi.org/10.3390/fermentation7040235

Submission received: 21 September 2021 / Revised: 11 October 2021 / Accepted: 14 October 2021 / Published: 19 October 2021

(This article belongs to the Special Issue Biomass and Waste Valorization)

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Abstract

Anaerobic co-digestion of sheep manure and potato waste was studied under batch and semi-continuous conditions. Biochemical methane potential tests were carried out for the different substrates before evaluating co-digestion at high-solid content. The reactors presented stable performance under mesophilic conditions, at an organic loading rate (OLR) of 3.5–4.0 kg VS/m³ and a hydraulic retention time (HRT) of approximately 20 days. Increasing the OLR of semi-continuous reactors decreased the methane yield and degradation efficiency of the digestion. Methane-specific production was in the range of 196 and 467 mL CH₄/g vs. (sheep manure system and co-digestion, respectively). Based on the experimental data obtained, a techno-economic study was performed for wet and solid-state fermentation systems, with the first configuration presenting better results. The economic feasibility of the hypothetical plant was analyzed considering the variability in electricity and compost selling prices. The economic feasibility of the plant was determined with an electricity selling price of EUR 0.25/kWh, and assuming a centralized plant serving several farmers. Still, this price was considered excessive, given the current electricity market values.

Keywords: co-digestion; high-solid digestion; reactor configuration; economic feasibility

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MDPI and ACS Style

González, R.; Blanco, D.; Cascallana, J.G.; Carrillo-Peña, D.; Gómez, X. Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis. Fermentation 2021, 7, 235. https://doi.org/10.3390/fermentation7040235

AMA Style

González R, Blanco D, Cascallana JG, Carrillo-Peña D, Gómez X. Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis. Fermentation. 2021; 7(4):235. https://doi.org/10.3390/fermentation7040235

Chicago/Turabian Style

González, Rubén, Daniel Blanco, José García Cascallana, Daniela Carrillo-Peña, and Xiomar Gómez. 2021. "Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis" Fermentation 7, no. 4: 235. https://doi.org/10.3390/fermentation7040235

APA Style

González, R., Blanco, D., Cascallana, J. G., Carrillo-Peña, D., & Gómez, X. (2021). Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis. Fermentation, 7(4), 235. https://doi.org/10.3390/fermentation7040235

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Anaerobic Co-Digestion of Sheep Manure and Waste from a Potato Processing Factory: Techno-Economic Analysis

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