Biological methanation in trickle bed reactors - a critical review

Area of Science:

• Biotechnology and Bioengineering
• Renewable Energy Conversion
• Chemical Engineering

Background:

• Biological methanation of H₂ and CO₂ in trickle bed reactors is a key technology for renewable energy storage.
• Recent research has focused on trickle bed reactor design and operation, primarily at laboratory scales.

Purpose of the Study:

• To provide a comprehensive overview of trickle bed reactor concepts and recent developments.
• To aid decision-making for future biological methanation projects.
• To identify strategies for improving reactor performance and upscaling.

Main Methods:

• Review of existing literature on trickle bed reactor design and operation.
• Analysis of key parameters including trickling, nutrient provision, inoculation, and operational modes (long-term, dynamic).
• Discussion of parameters for reactor upscaling and comparison.

Main Results:

• Identified critical design and operational parameters for biological methanation.
• Highlighted recent advances in trickle bed reactor technology.
• Discussed methods for assessing and enabling reactor upscaling.

Conclusions:

• Operational strategies and research needs were identified to enhance trickle bed reactor performance.
• The review supports informed decisions for implementing and optimizing biological methanation processes.
• Further research is needed to improve overall reactor efficiency and scalability.