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Innovative Ex-situ Biological Biogas Upgrading Using Immobilized Biomethanation Bioreactors Combined With Micro Sorbents

Year: 2025

Type: conference-paper

Abstract: Biogas upgrading enhances energy value by increasing methane content. This study investigates an ex-situ biological upgrading approach using immobilized biomethanation bioreactors (IBBRs) with micro sorbents. Microporous organic polymers (MOPs: XDV1, XDV3) and powdered activated carbon (PAC) were incorporated into hydrophilic polyurethane (HPU) matrices to improve H₂ and CO₂ adsorption, enhancing hydrogenotrophic methanogenesis. Semi-batch and continuous lab-scale IBBRs were tested to assess the impact of gas recirculation and micro sorbents on methane production, H₂ consumption, and CO₂ removal. XDV1 exhibited the highest CH₄ enhancement due to superior gas adsorption capacity. Reducing recirculation lowered methane yield, but MOPs-alginate reactors achieved the highest CH₄ (83%), surpassing PAC-based systems. Hydrogen consumption was highest in MOPs-alginate reactors, confirming enhanced gas transfer efficiency. These results highlight micro sorbents as an effective tool for optimizing biomethanation, offering a scalable solution for biogas valorization.

Source: Zenodo (CERN European Organization for Nuclear Research)

DOI: 10.5281/zenodo.17357531

Authors: Baransi Karkaby, Katie, Hassanin, Mahdi, Sabbah, Isam

Institution: Braude College of Engineering Karmiel

Language: English

Topic: Anaerobic Digestion and Biogas Production

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Responsible consumption and production, Climate action, Industry, innovation and infrastructure

Open Access status: green

OpenAlex ID: W7092193466

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