Biomethane Production from the Two-Stage Anaerobic Co-Digestion of Cow Manure: Residual Edible Oil with Two Qualities of Waste-Activated Sludge

Jesus Eduardo de la Cruz-Azuara, Alejandro Ruiz-Marin (), Yunuen Canedo-Lopez, Claudia Alejandra Aguilar-Ucan, Rosa Maria Ceron-Breton, Julia Griselda Ceron-Breton and Francisco Anguebes-Franseschi
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Jesus Eduardo de la Cruz-Azuara: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico
Alejandro Ruiz-Marin: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico
Yunuen Canedo-Lopez: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico
Claudia Alejandra Aguilar-Ucan: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico
Rosa Maria Ceron-Breton: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico
Julia Griselda Ceron-Breton: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico
Francisco Anguebes-Franseschi: Facultad de Quimica, Universidad Autonoma del Carmen, Calle 56 No. 4. Av. Concordia, Col. Benito Juárez, Ciudad del Carmen C.P. 24180, Campeche, Mexico

Energies, 2024, vol. 17, issue 12, 1-10

Abstract: Wastewater treatment systems produce large volumes of sludge which is not used; its final disposal is in soil or landfill. This sludge represents a biomethane-energy alternative through anaerobic co-digestion, contributing to reducing the environmental impacts caused by their inadequate disposal. Biomethane production by the two-stage production method in batch digesters with pH and temperature control was evaluated by two qualities of waste-activated sludge (SLB 50 and SLB 90 ) and with a mixture of two co-substrates: cow manure (CEV 50 and CEV 90 ) and residual edible oil (CAV 50 and CAV 90 ). Bacteria in good-quality sludge (SLB 90 ) showed a faster adaptation of 2 days than those in low-quality sludge (SLB 50 ), with a 25-day lag phase. The highest CH 4 production was for SLB 90 (303.99 cm 3 d −1 ) compared to SLB 50 (4.33 cm 3 d −1 ). However, the cow manure–sludge mixture (CEV 90 ) contributed to the increased production of CH 4 (42,422.8 cm 3 d −1 ) compared to CEV 50 (12,881.45 cm 3 CH 4 d −1 ); for CAV 90 and CAV 50 , these were 767.32 cm 3 d −1 and 211.42 cm 3 d −1 , respectively. The addition of sludge co-substrates improves the nutrient balance and C/N ratio; consequently, methane production improves. This methodology could be integrated into concepts of the circular economy.

Keywords: biomethane; method two-stage; waste-activated sludge; sludge quality; co-substrata (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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