Elucidating Synergetic Effects of Anaerobic Co-Digestion of Slaughterhouse Waste with Livestock Manures

Sangyeol Jo, Rahul Kadam, Heewon Jang, Dongyun Seo and Jungyu Park ()
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Sangyeol Jo: Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
Rahul Kadam: Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
Heewon Jang: Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
Dongyun Seo: Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea
Jungyu Park: Department of Advanced Energy Engineering, Chosun University, Gwangju 61452, Republic of Korea

Energies, 2024, vol. 17, issue 12, 1-13

Abstract: This study quantitatively analyzed the synergistic effects of co-digestion of slaughterhouse waste (SHW) with cattle manure (CM) and pig manure (PM) on methane production by applying statistical methods. The biochemical methane potential of volatile solid concentration-based mixtures showed that the biodegradability (BD) of the co-substrates was improved as the mixing proportion of the highly biodegradable SHW increased. Furthermore, mathematical analysis using the modified Gompertz model showed that an increase in the SHW mixture ratio shortened the lag phase at the initial period by more than 58%. The synergy index (SI) analysis revealed that co-digestion of CM and SHW mixed at an equal ratio of 1:1 in sample S4 resulted in a higher SI of 1.18 compared to 1.10 for PM and SHW in sample S5. An overlay plot based on BD and SI identified the optimal mixture ratio as 26.9:31.0:42.1 (CM/PM/SHW), where both BD and SI reached their maximum values. The study successfully demonstrated that co-digestion of SHW with livestock manure enhances BD through a synergistic effect.

Keywords: anaerobic co-digestion; slaughterhouse waste; livestock manures; mixture design (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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