A process-based mathematical model on methane production with emission indices for control

Area of Science:

• Environmental Science
• Biotechnology
• Chemical Engineering

Background:

• Methane (CH4) production via biodegradation is a significant biogeochemical process with environmental implications.
• Understanding and controlling methane emissions is crucial for climate change mitigation.
• Existing models often lack the detail to predict long-term emission tendencies and process stability.

Purpose of the Study:

• To develop a process-based mathematical model for methane production through biodegradation.
• To introduce novel emission indices for assessing process equilibrium and long-term methane emission tendencies.
• To analyze the vulnerability of methane production to soil temperature fluctuations during the methanogenic phase.

Main Methods:

• Development of a three-dimensional mathematical model using ordinary differential equations.
• Introduction and application of three novel emission indices for model interpretation.
• Analysis of soil temperature effects on the methanogenic phase of methane production.

Main Results:

• The developed model provides a framework for interpreting methane production dynamics.
• The new emission indices effectively evaluate the feasibility of equilibrium and long-term emission trends.
• A specific temperature range was identified for non-vulnerable methane production, including zero-emission scenarios.

Conclusions:

• The mathematical model and emission indices offer valuable tools for managing methane production processes.
• Optimizing soil temperature is critical for ensuring stable and potentially zero-emission methane production.
• The findings contribute to a better understanding of biodegradation processes and their environmental impact.