Insect-based biodegradation of biodegradable films producing high-value molecules

Overview

This research proposes an innovative biotechnology platform that uses insect larvae to biodegrade biodegradable films while producing high-value molecules suitable for multiple industries. The approach exploits the natural digestive capabilities of insects, whose gut microbiota—including bacteria, fungi, archaea, and protists—work together with endogenous enzymes to break down complex polymers.

The solution addresses two challenges simultaneously: sustainable management of biodegradable polymer waste and production of valuable biomolecules. End products include proteins, lipids, chitin, and chitosan with applications in packaging, cosmetics, and pharmaceuticals. Insect proteins may also serve as sustainable alternatives to phenol in plywood manufacturing.

Technical specifications

Core approach:

• Insect larvae biodegrade natural and synthetic polymer films through combined enzymatic and microbial action
• Gut microbiota consortia provide enhanced biodegradation efficiency compared to single-species microbial processes
• Two insect species will be evaluated: Tenebrio molitor (Coleoptera) and Galleria mellonella (Lepidoptera)

High-value end products:

• Chitin and chitosan: Biodegradable and biocompatible polymers with antimicrobial and antioxidant properties; capable of forming films and vesicles
• Proteins: Potential replacement for phenol in plywood used in furniture manufacturing
• Lipids and bioactive molecules: Including antimicrobial peptides whose production can be modulated through diet
• Insect exuviae: Collected during moulting for chitin extraction
• Larval faeces: Analyzed for composition and potential reuse applications

Research capabilities:

• Insect breeding and physiology expertise with focus on symbiont interactions
• Bioactive compound production analysis
• Diet optimization for enhanced biodegradation and end-product quality
• Microbiota composition and adaptation studies

Technology readiness level

The research is at an early-to-mid development stage. The team has established expertise in insect breeding, physiology, and symbiont interactions, building on published evidence that larvae of Lepidoptera, Coleoptera, and Diptera can biodegrade various polymers. Future validation will involve setting up insect rearings on different biodegradable films, assessing larval growth performance and substrate mass reduction, analyzing microbiota adaptation, and characterizing the protein, lipid, and bioactive composition of mature larvae. The research team is actively seeking partners for chemical analyses and conversion/reuse of high-value final products.