Novel Polypeptide for Industrial Polyester Degradation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for degrading polyester-containing plastics are inefficient and costly, particularly for single-use disposable applications, and existing enzymatic methods lack effective industrial-scale solutions for degrading polyesters in film or pellet form.
Innovation Solution
A novel polypeptide derived from Actinomadura sp. with enhanced thermostability and polyester-degrading activity is identified, allowing for the industrial-scale degradation of polyesters, including polylactic acid, and the production of reusable monomers and oligomers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If mechanical recycling processes are used to reprocess plastic material, then recycling can be achieved, but huge amounts of electricity are consumed and equipment costs are expensive
Solution Approach 1:
The patent replaces mechanical recycling processes with enzymatic degradation. Instead of using mechanical extrusion equipment that consumes huge amounts of electricity, the invention uses isolated enzymes (proteases) to chemically degrade polyester plastics into monomers, thereby substituting mechanical energy with biochemical catalysis to achieve recycling
2Productivity
If chemical recycling processes are used to recover chemical constituents, then monomers can be recovered, but the process is expensive and not efficient on raw plastic products
Solution Approach 1:
The patent replaces expensive chemical recycling processes with enzymatic degradation. Instead of complex chemical processes that require purified polymers and expensive reagents, the invention uses isolated enzymes to efficiently degrade raw polyester plastics (films, pellets, mixed plastics) into monomers under milder conditions, reducing both cost and complexity
Solution Approach 2:
The patent changes the parameters of the recycling process by using enzymatic catalysis instead of harsh chemical conditions. The enzymes operate at moderate temperatures and pH levels, transforming the process from high-cost chemical recycling to cost-effective biological recycling that works on raw plastic products
3Productivity
If existing enzymatic degradation methods are used, then plastic degradation can occur, but the enzymes only work on emulsion form and have poor degrading ability
Solution Approach 1:
The patent replaces existing enzymatic methods with improved isolated enzymes. Instead of using crude enzyme extracts that only work on emulsions, the invention uses purified and isolated protease enzymes that maintain high activity on various substrate forms including films, pellets, and mixed plastics, thereby improving both degradation capability and substrate adaptability
Solution Approach 2:
The patent extracts and isolates the active degradative enzymes from their natural sources. By isolating the specific protease enzymes responsible for polyester degradation and purifying them, the invention creates enzymes with enhanced stability and broader substrate compatibility, removing the limitations of crude enzyme preparations
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
The novel polypeptide effectively degrades polyester plastics, enabling the recycling of polyesters on an industrial scale, reducing environmental impact and providing a cost-effective alternative to existing recycling methods.
Implementation Method 1
enzymes can accelerate hydrolysis of plastics
Implementation Method 2
The polypeptide of the invention is particularly suited to degrade polylactic acid, and material containing polylactic acid, as plastic material
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to a new isolated polypeptide comprising an amino acid sequence having at least 94%, 95%, 99% or 100% identity to the full length amino acid sequence set forth in SEQ ID N°1, and having a polyester degrading activity, and uses thereof.