Insect Substrate Production Without NaOH Delignification
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Solution Overview
Problem
Current methods for producing insect substrates from lignocellulose are inefficient, costly, and not suitable for industrial-scale production due to the need for delignification treatments involving NaOH, which are expensive and time-consuming, and do not effectively utilize palm oil side streams like empty fruit bunches for large-scale insect biomass production.
Innovation Solution
A process that sterilizes a lignocellulose substrate and mixes it with a lignin-degrading fungus for solid state fermentation without delignification treatment, using palm oil side streams like empty fruit bunches and palm kernel meal, which omits the use of NaOH and other costly steps, allowing for easier, faster, and more sustainable production of a high-quality insect substrate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If delignification treatment involving NaOH is applied to lignocellulose substrate before solid state fermentation, then the substrate structure is modified to improve insect substrate quality, but the process becomes more expensive, time-consuming, and less suitable for industrial-scale production
Solution Approach 1:
The invention extracts and removes the delignification treatment step (NaOH addition, steaming, washing, drying) from the conventional process, retaining only the essential sterilization and fermentation steps. This eliminates the harmful and costly intermediate treatment while preserving the core functionality of producing high-quality insect substrate through direct solid state fermentation of lignocellulose
Solution Approach 2:
The invention changes the key parameter of substrate preparation by eliminating chemical delignification and replacing it with direct microbial degradation during fermentation. This parameter change transforms the process from a multi-step chemical-physical treatment to a simpler biological process, reducing cost and time while maintaining substrate quality through the natural enzymatic action of the fungus
2Manufacturing precision
If delignification treatment with NaOH, steaming, washing and drying is performed, then lignocellulose structure is modified, but the process becomes more costly and time-consuming
Solution Approach 1:
The invention performs preliminary sterilization of the lignocellulose substrate without subsequent delignification treatment, then directly proceeds to solid state fermentation. This preliminary action prepares the substrate for microbial degradation while eliminating the time-consuming intermediate steps of NaOH treatment, steaming, washing, and drying that would otherwise be required
3Reliability
If conventional delignification methods are used, then substrate is prepared for insect production, but the process is not suitable for industrial-scale production due to cost and time constraints
Solution Approach 1:
The invention employs the lignin-degrading fungus to naturally degrade lignin in the substrate during solid state fermentation, eliminating the need for external chemical delignification processes. This self-service approach uses the microbial system's own enzymatic capabilities to prepare the substrate, making the process simpler, cheaper, and more scalable for industrial production while maintaining substrate suitability for insect rearing
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 process results in a more efficient, cost-effective, and sustainable production of insect substrates, utilizing underutilized palm oil side streams, reducing waste, and providing a high-quality feed for insect larvae, such as the black soldier fly, while minimizing environmental impact.
Implementation Method 1
incubating the solid state mixture to allow a solid state fermentation, wherein enzymes produced by the fungus convert the solid state mixture to an insect substrate
Implementation Method 2
enzymes produced by the fungus convert the solid state mixture to an insect substrate
Data Source
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AI summary
A process for the production of an insect substrate is provided, which comprises or consists of the steps of sterilizing a substrate comprising lignocellulose, mixing the sterilized substrate comprising lignocellulose with a lignin-degrading fungus to form a solid state mixture and incubating the solid state mixture to allow a solid state fermentation, wherein enzymes produced by the fungus convert the solid state mixture to an insect substrate. The process is characterized in that it does not comprise a step in which the substrate comprising lignocellulose is subjected to a delignification treatment involving an addition of NaOH to the substrate comprising lignocellulose before the solid state fermentation. The process has the advantage that it allows an easier, faster, more efficient, lower-cost and more sustainable and industrial-scale production of an insect substrate from a substrate comprising lignocellulose than known processes. Moreover, an insect substrate is provided and uses thereof are proposed.