Enzymatic Chitin Extraction via Oxidative Pre-treatment
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Solution Overview
Problem
Traditional methods for extracting chitin and chitosan from crustaceans involve harmful chemicals that distort the chitin structure and generate hazardous effluents, and enzymatic hydrolysis methods result in brownish-colored chitin requiring extensive purification, which alters the chemical structure.
Innovation Solution
A process involving the treatment of insect cuticles with an oxidizing agent followed by enzymatic hydrolysis using proteolytic enzymes to produce purer chitin with a structure closer to its natural form, utilizing edible insect species like Tenebrio molitor and Hermetia illucens, and involving steps like scalding, grinding, and pressing to facilitate enzyme access and product recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional chemical extraction methods are used, then chitin can be extracted from crustaceans, but the chitin structure is distorted and harmful chemicals are used
Solution Approach 1:
The patent replaces chemical extraction methods with enzymatic hydrolysis using proteolytic enzymes. This substitution eliminates the need for harsh chemicals like hydrochloric acid and sodium hydroxide, thereby preserving the natural chitin structure and reducing environmental harm while maintaining extraction efficiency.
Solution Approach 2:
The patent changes the extraction parameters from chemical reagents to biological enzymes operating under milder conditions (physiological pH and temperature). This parameter change allows for effective chitin extraction without distorting the molecular structure or requiring harmful chemical treatments.
2Stability of the object's composition
If enzymatic hydrolysis is used, then chitin structure is preserved, but the chitin becomes brownish and requires extensive purification
Solution Approach 1:
The patent applies a preliminary oxidation treatment with hydrogen peroxide before enzymatic hydrolysis. This pre-treatment prevents the formation of brownish pigments during the enzymatic process, thereby maintaining both the structural integrity and the visual quality of the chitin without requiring extensive post-purification steps.
Solution Approach 2:
The patent introduces hydrogen peroxide as an intermediary substance that mediates between the enzymatic hydrolysis process and the final chitin quality. The oxidizing agent acts as a protective intermediary that prevents unwanted coloration while allowing the enzymatic process to proceed effectively.
3Manufacturing precision
If purification steps are added to remove brownish color, then chitin color is improved, but the chemical structure is altered
Solution Approach 1:
The patent performs the oxidation treatment as a preliminary step before enzymatic hydrolysis, rather than as a post-purification step. This timing difference is crucial because it prevents color formation in the first place while avoiding exposure of the already-hydrolyzed chitin to oxidizing agents that could alter its chemical structure.
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 method achieves chitin with a degree of purity between 55% and 90% and molecular size closer to the natural state, reducing environmental impact and avoiding allergic reactions, while maintaining the integrity of the chitin structure.
Implementation Method 1
treating the cuticles of insects with an oxidant before carrying out enzymatic hydrolysis
Implementation Method 2
enzymatic hydrolysis of insect cuticles by a proteolytic enzyme
Data Source
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AI summary
The invention relates to chitin, a hydrolysate and a method for the production of at least one desired product from insects. More specifically, the invention relates to a method for the production of chitin and/or chitosan from insect cuticles, comprising a step in which insect cuticles are treated with an oxidising agent, followed by a step involving the enzymatic hydrolysis of the insect cuticles using a proteolytic enzyme.