Integrated Germination Feedstock Loop for Self-Sufficient Biogas Plants
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Solution Overview
Problem
Biogas plants face challenges in maintaining a consistent supply of raw materials due to high input requirements and construction costs, leading to dependence on external suppliers, and existing solutions do not adequately address the need for a self-sufficient and environmentally friendly biofuel production.
Innovation Solution
An operationally interconnected germination and biogas plant subsystems system that utilizes grains to produce biofuel, leveraging the synergy between germination and biogas processes to minimize additives and ensure a continuous, sustainable supply of biofuel and nutrients, with grains like rye being particularly effective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If targeted energy crops are used for biogas production, then biogas production capacity is improved, but input requirements and processing costs increase
Solution Approach 1:
The system enables the biogas plant to produce its own feedstock through an integrated germination subsystem that grows energy crops using waste heat and CO2 from the biogas digestion process, eliminating dependence on external suppliers and reducing input requirements
2Ease of manufacture
If waste biogas plants are constructed, then investment costs are reduced, but hygiene requirements and operational complexity increase
Solution Approach 1:
The germination subsystem produces clean, controlled feedstock internally, reducing the need to handle external waste materials and thereby simplifying hygiene requirements while maintaining low construction costs
3Adaptability or versatility
If external raw material suppliers are used, then operational flexibility is improved, but self-sufficiency and cost control deteriorate
Solution Approach 1:
The germination subsystem is merged with the biogas plant to form an integrated system where the germination unit produces feedstock that is directly consumed by the biogas digester, creating a closed loop that ensures self-sufficiency while maintaining operational flexibility
Solution Approach 2:
The system uses feedback from the biogas plant's waste heat and CO2 emissions to optimize the germination process, creating a self-regulating system that adjusts feedstock production based on actual biogas processing needs
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
This system achieves a closed, self-sufficient biofuel production cycle that optimizes resource use, reduces external dependencies, and enhances biogas plant efficiency by using grains with low EGC coefficients, minimizing waste and external energy needs.
Implementation Method 1
the germination plant, which produces a sufficient amount of biofuel or feed required for the continuous production of biogas
Implementation Method 2
biogas plants (BPS), has emerged as an economically interesting alternative for the utilisation of surplus agricultural production
Implementation Method 3
the biogas plant, which provides the necessary carbon dioxide, energy in the form of heat and light
Implementation Method 4
the biogas plant, which provides the necessary carbon dioxide, energy in the form of heat and light
Data Source
Figure 1
AI summary
The biofuel production method comprises a series of steps performed in the germination plant (2) subsystem and operationally interconnected biogas plant (3). The process starts with the provision of grains, followed by separation of impurities and soaking in water. The grains are then germinated with controlled irrigation and exposure to light. After germination, the grains are mixed and homogenised to form biofuel (1) for the biogas plant (3). This biofuel (1) is then used to produce biogas (6). The method includes embodiments such as using specific types of grain, mixing with broken parts of the grain or unused water, and using biogas plant (3) co-products such as fugate (4) as fertilizer, and residual energy (7) for temperature control. In addition, the method includes the production of biogas (6) and electric energy (8), wherein the electricity (8) is potentially used to illuminate the grain during the germination.