Anaerobic co-digestion of cattle rumen content and food waste for biogas production: Establishment of co-digestion ratios and kinetic studies. (June 2022)

• Record Type: Journal Article
• Authors: Ihoeghian, Newton A.; Amenaghawon, Andrew N.; Ajieh, Mike U.; Oshoma, Cyprian E.; Ogofure, Abraham; Erhunmwunse, Nosakhare O.; Edosa, Valerie I.O.; Tongo, Isioma; Obuekwe, Ifeyinwa S.; Isagba, Ebuwa S.; Emokaro, Christopher; Ezemonye, Lawrence I.N.; Lag-Brotons, Alfonso J.; Semple, Kirk T.; Martin, Alastair D.
• Is Part Of: Bioresource technology reports. Volume 18(2022)
• Publication Date: 2022-06
• Subjects: Anaerobic digestion -- Cattle rumen content -- Food waste -- Kinetic modeling -- Biomethane yield -- Co-digestion; Biomass energy -- Periodicals; Biotransformation (Metabolism) -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Waste products as fuel -- Periodicals; Waste products as fuel; Organic wastes; Factory and trade waste; Biotransformation (Metabolism); Biomass energy; Agricultural wastes; Periodicals; Electronic journals; 662.88
• DOI: 10.1016/j.biteb.2022.101033
• Languages: English
• ISSNs: 2589-014X

Abstract

Abstract: This study investigated the batch co-digestion of cattle rumen content (CRC) and food waste (FW) for biogas production in different ratios (CRC:FW) to assess biogas production and process stability. The results showed that CRC and FW possess characteristics that are desirable for biogas production as seen in their respective total solids (10.85 and 26.53%), volatile solids (89 and 86.83%) and carbon to nitrogen ratio (23.7 and 15.7) values. Co-digestion improved carbon to nitrogen ratio, biogas yield and pH of the co-substrate compared to individual substrates. The 50:50 co-digestion ratio was found to be optimum as it gave the maximum cumulative biogas yield of 320.52 ml/gVSadded . Co-digestion also improved the pH, volatile fatty acid (VFA) and total ammonia nitrogen (TAN) characteristics during digestion. The cone model was able to adequately represent the kinetics of the process. These findings have provided very useful insights into the co-digestion of CRC and FW. Graphical abstract: Unlabelled Image Highlights: Biogas from production from co-digestion of CRC and FW was investigated. 50:50 ratio of CRC and FW is recommended for biogas production. Co-digestion of CRC and FW enhanced AD process performance. The cone model can adequately predict biogas production for co-digested CRC and FW.