Enzymatic Corn Starch Separation Process
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Solution Overview
Problem
Current corn starch processing methods, such as those involving high-pressure soaking and the use of proteinases, are inefficient, costly, and environmentally harmful due to high energy consumption, equipment complexity, and protein loss, as well as pollution from soluble proteins in process water.
Innovation Solution
An enzymatic process is introduced that uses cellulase or xylanase enzyme preparations, or their combination, added at various stages of corn processing to enhance mechanical separation efficiency, reduce energy consumption, and improve starch and protein yield without hydrolyzing proteins, thereby reducing environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If high-pressure soaking method is used to shorten soaking time, then soaking time is reduced, but equipment complexity and processing cost increase significantly
Solution Approach 1:
The patent replaces the mechanical high-pressure soaking system with an enzymatic chemical system. Instead of using complex high-pressure equipment to physically break down corn structures, the invention uses enzymes (cellulase, hemicellulase, pectinase, protease) to chemically degrade the cell wall and connective tissue, achieving the same separation effect with simple mixing equipment and lower processing costs.
2Productivity
If proteinase is added to soaking solution to degrade proteinaceous matrix, then starch release is improved, but protein loss increases and process water pollution worsens
Solution Approach 1:
The patent extracts and removes proteinase from the enzymatic system, retaining only cellulase, hemicellulase, pectinase, and protease in controlled amounts. By eliminating proteinase which causes excessive protein degradation, the invention achieves starch release through cell wall degradation while preserving most corn proteins for gluten meal production, thereby reducing protein loss and process water pollution.
Solution Approach 2:
The patent uses cellulase, hemicellulase, and pectinase as intermediary enzymes to degrade the cell wall and connective tissue, indirectly releasing starch without directly attacking proteins. These enzymes act as mediators that achieve starch liberation while preserving protein integrity, unlike proteinase which directly hydrolyzes proteins.
3Reliability
If mechanical separation methods are used for starch, protein, embryo and fiber separation, then separation is achieved, but energy consumption and processing cost increase
Solution Approach 1:
The patent replaces intensive mechanical separation methods (crushing, centrifugation, squeezing, filtrating) with a biochemical approach. Enzymes pre-degrade the complex matrix structures, allowing subsequent separation steps to work more efficiently with reduced mechanical energy input. The enzymatic treatment softens and loosens the corn structure, making mechanical separation easier and more energy-efficient.
Solution Approach 2:
The patent performs preliminary enzymatic degradation of cell walls and connective tissue before mechanical separation. This preliminary action of breaking down structural barriers makes the subsequent mechanical separation process more efficient, reducing the energy required for crushing, centrifugation, and filtration while improving separation effectiveness.
4Ease of manufacture
If conventional wet process is used for corn starch production, then standard processing is achieved, but separation purity and deep processing efficiency are limited
Solution Approach 1:
The patent introduces enzymes as intermediary agents that selectively degrade specific components (cellulose, hemicellulose, pectin) without affecting starch or proteins. This selective degradation improves separation purity by better distinguishing between different corn components, enabling more precise isolation of starch, gluten meal, and other products for deep processing applications.
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 enzymatic process increases corn starch and gluten meal yields, reduces energy and water consumption, and improves separation purity, offering a more efficient and environmentally friendly corn starch production method.
Implementation Method 1
add enzyme preparation before the step of washing, dewatering and drying the starch; the enzyme preparation is cellulase, or xylanase, or combination of the cellulase and the xylanase
Data Source
AI summary
A method of producing corn starch by enzymatic process involving: soaking the corn; crushing the corn, separating and washing embryo; fine grinding; washing and drying fiber; separating and drying protein; washing, dewatering and drying the starch. An enzyme preparation is added before the step of washing, dewatering and drying the starch; the enzyme preparation is cellulose, or xylanase, or combination of the cellulose and the xylanase; and addition of the enzyme preparation is from 0.001% to 0.08% by weight of the corn. Based on the technology of traditional wet process, the method of the present invention comprises a step of adding enzyme preparation in the process of separating the corn, which improves the effect and the efficiency of mechanical separation, and further improves the purity and yield of the substance separated while also reducing the energy consumption.