Biopurification of Packaging Using Cellulose Hydrolysis Enzymes
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Solution Overview
Problem
The recycling of glass packaging is hindered by the difficulty in eliminating organic contaminants, which vary in composition and biodiversity, leading to inconsistent quality of cullet and environmental issues due to high water content and microflora variability.
Innovation Solution
A biopurification process using a preparation containing cellulose hydrolysis enzymes (cellobiohydrolase, β 1-4 glucanase, and β 1-4 glucosidase) to break down cellulose, followed by microbial action to degrade biodegradable organic matter into volatile compounds, reducing contamination and stabilizing waste quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional washing and drying methods are used to remove organic contaminants from packaging, then some organic material is removed, but the process is ineffective against biodegradable organic matter and requires high energy input for drying at 110°C and calcination at 550°C
Solution Approach 1:
The invention changes the approach from thermal removal (drying at 110°C and calcination at 550°C) to biological degradation by adjusting parameters such as moisture content to 40-60% and introducing cellulolytic enzymes and microorganisms, thereby reducing energy consumption while effectively removing biodegradable organic matter
Solution Approach 2:
The invention replaces the mechanical/thermal system (washing and high-temperature drying/calcination) with a biological system using cellulolytic enzymes and microorganisms that naturally degrade organic matter at ambient or moderate temperatures, significantly reducing energy requirements
2Quantity of substance
If high-temperature calcination at 550°C is used to eliminate organic matter, then organic contaminants are effectively removed, but the process is energy-intensive and unsuitable for temperature-sensitive materials
Solution Approach 1:
The invention changes the processing temperature from high (550°C) to ambient or moderate temperatures by utilizing biological degradation processes, making the treatment suitable for temperature-sensitive packaging materials while still achieving effective removal of biodegradable organic matter
Solution Approach 2:
The invention substitutes the thermal calcination process with a biological degradation system using enzymes and microorganisms, replacing high-temperature physical treatment with low-temperature chemical-biological treatment
3Quantity of substance
If natural biodegradation is allowed to occur without intervention, then organic matter is eventually degraded, but the process is too slow and inconsistent for practical recycling applications
Solution Approach 1:
The invention performs preliminary action by pre-treating the packaging with cellulolytic enzymes to break down cellulose into more biodegradable forms before introducing microorganisms, accelerating the overall degradation process and making it suitable for practical recycling applications
Solution Approach 2:
The invention introduces an intermediary step using cellulolytic enzymes as mediators that convert recalcitrant cellulose into more labile compounds that microorganisms can more easily degrade, thereby bridging the gap between slow natural degradation and rapid practical treatment
4Quantity of substance
If water is used to wash packaging to remove organic contaminants, then some contaminants are removed, but the high water content creates additional difficulties in controlling biodegradation processes and increases processing complexity
Solution Approach 1:
The invention optimizes the moisture content parameter to a specific range of 40-60%, which is sufficient to support microbial activity and enzymatic degradation while avoiding the problems associated with excessive water content, thereby simplifying process control
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 process effectively reduces biodegradable organic matter content by at least 90% in packaging, ensuring consistent cullet quality and minimizing environmental impact by transforming organic material into CO2, water, or alcohol, thereby facilitating glass furnace recycling.
Implementation Method 1
A biopurification process using a preparation containing cellulose hydrolysis enzymes (cellobiohydrolase, β 1-4 glucanase, and β 1-4 glucosidase) to break down cellulose
Implementation Method 2
followed by microbial action to degrade biodegradable organic matter into volatile compounds
Implementation Method 3
transforming organic material into CO2, water, or alcohol
Data Source
Figure 1~3
Figure 2
AI summary
The invention relates to a process for recycling packaging contaminated by biodegradable organic matter containing cellulose and containing endogenous flora, comprising treating the contaminated packaging with a preparation comprising at least one cellulose hydrolysis enzyme, said preparation being left to act on the contaminated packaging, said enzyme degrading the cellulose into a mass of biodegradable organic matter, which is then degraded by the endogenous flora.