Short-Chain Monocarboxylic Acids Boost Anaerobic Biogas Yield
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Solution Overview
Problem
Current biogas production methods are inefficient, leading to incomplete conversion of fermentable carbon into carbon dioxide and methane, and existing solutions lack simplicity, reproducibility, and controllability in increasing biogas yield.
Innovation Solution
A method involving an anaerobically active bacterial population with the addition of a mixture of short-chain monocarboxylic acids, such as 2-methylbutyric acid, 3-methylbutyric acid, and isobutyric acid, which are added in small quantities to enhance biogas and methane production during anaerobic biomass fermentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional biogas production methods are used, then the process is simple to operate, but the biogas yield is incomplete and low
Solution Approach 1:
The patent applies parameter changes by modifying the chemical composition parameters of the fermentation system through the addition of specific short-chain monocarboxylic acids (C3-C5). This changes the metabolic parameters of the bacterial population, leading to increased biogas yield without fundamentally altering the fermentation process structure or requiring complex additional equipment.
2Productivity
If existing solutions for increasing biogas yield are implemented, then biogas production increases, but the solutions lack reproducibility and controllability
Solution Approach 1:
The patent defines specific parameter ranges for the monocarboxylic acid addition (0.001-10 g/L) and specifies particular acid types (C3-C5 monocarboxylic acids), creating a controllable and reproducible parameter-based approach. This allows consistent biogas yield improvement across different fermentation systems through precise parameter control rather than relying on variable biological inoculums or complex process modifications.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly increases biogas and methane yield, with the effect attributed to the physiological modulation of the bacterial population rather than substrate metabolism, providing a controllable and reproducible method for biogas production.
Implementation Method 1
an anaerobically active bacterial population suitable for producing biogas from fermentable biomass
Implementation Method 2
the effect attributed to the physiological modulation of the bacterial population rather than substrate metabolism
Data Source
Figure 1
AI summary
The present invention relates to a process for increasing the biogas yield of an anaerobic biomass fermentation, comprising at least the following process steps: a) providing an anaerobically active bacterial population suitable for producing biogas from fermentable biomass and/or non-biogenic residues, and b) adding the fermentable biomass and/or the non-biogenic residues to the bacterial population once or several times, wherein in process step a), in process step b), or in both process steps, a mixture of at least two different C3-C5 monocarboxylic acids is added to the bacterial population once or several times. Furthermore, the present invention relates to a carboxylic acid composition comprising at least three different branched C3-C5 monocarboxylic acids.