Duckweed Turion Starch Extraction With Decolorization and Dispersion
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Solution Overview
Problem
Current methods for extracting duckweed turion starch are costly, difficult to industrialize, and result in low starch extraction rates and purity due to pigment impregnation and inefficient separation processes.
Innovation Solution
A method involving soaking duckweed turions in organic solvents or solvent-water mixtures followed by dispersion, decolorization, and centrifugal separation to remove pigments and facilitate starch extraction, using equipment like dispersion machines and centrifuges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If freezing and pulverization with liquid nitrogen is used for extracting turion starch, then the extraction process can be completed, but the cost is high and industrialization is difficult
Solution Approach 1:
The patent replaces expensive liquid nitrogen with ordinary water as the freezing medium. Water is inexpensive, readily available, and can be easily disposed of or reused, making the process economically viable for industrialization while achieving the same freezing and pulverization effect needed for starch extraction.
Solution Approach 2:
The patent changes the physical parameters of the freezing process by using water instead of liquid nitrogen. This substitution maintains the temperature reduction and freezing effect needed for cell rupture and starch release, while dramatically reducing costs and improving industrial scalability.
2Manufacturing precision
If conventional extraction methods are used, then the extraction process is simple, but the starch is impregnated with pigment, the extraction rate is low and purity is low
Solution Approach 1:
The patent extracts and removes pigments from the turion material before starch extraction through soaking in water or weak alkaline solutions. This preliminary removal of harmful pigments prevents their impregnation into the starch, thereby improving starch purity while maintaining high extraction rates through the subsequent freezing-pulverization-dispersion process.
Solution Approach 2:
The patent performs preliminary decolorization treatment by soaking the turion material in water or weak alkaline solutions before the main extraction process. This preliminary action removes pigments that would otherwise contaminate the starch, ensuring high purity output while the subsequent steps maintain high extraction efficiency.
3Productivity
If liquid nitrogen freezing and pulverization is used, then starch can be extracted, but the process is difficult to industrialize
Solution Approach 1:
The patent replaces complex liquid nitrogen handling systems with simple water-based freezing equipment. Ordinary water can be frozen using conventional freezers or refrigeration equipment, eliminating the need for specialized liquid nitrogen storage, handling, and safety infrastructure, thereby simplifying the overall process for industrial application.
Solution Approach 2:
The patent replaces the complex cryogenic mechanical system involving liquid nitrogen circulation and temperature control with a simpler mechanical freezing system using water and conventional refrigeration equipment. This substitution maintains the necessary freezing effect while dramatically reducing system complexity and operational difficulty.
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 method achieves high starch purity (93% or above) and extraction rates (85% or above), is cost-effective, and easy to industrialize, with the starch having wide applications in food, medicine, cosmetics, and other industries.
Implementation Method 1
the organic solution and water can enter cells of the turion and have a certain ability to dissolve a lipid-soluble pigment and a water-soluble pigment
Implementation Method 2
by conducting extraction with the dispersion machine, not only can the starch be separated from the cells of the duckweed turion, but also cell walls can be connected to facilitate centrifugal separation in a later stage
Implementation Method 3
cell walls can be connected to facilitate centrifugal separation in a later stage
Data Source
AI summary
The present disclosure discloses a method for extracting a duckweed turion starch, and belongs to the technical field of agriculture and food. The extraction method of the present disclosure includes the following steps: conducting drying and rehydration on a duckweed turion to obtain a rehydrated turion, soaking the rehydrated turion in a solvent, and then conducting washing and filtration to obtain a decolorized duckweed turion; or conducting beating on a fresh duckweed turion, soaking the fresh duckweed turion in a solvent, and then conducting washing and filtration to obtain a decolorized duckweed turion slurry; and putting the decolorized duckweed turion or the decolorized duckweed turion slurry in a dispersion liquid for extraction at a rotation speed of 6,000-18,000 rpm at 25-50° C. for 5-60 min, and then conducting filtration, centrifugation, washing and drying to obtain the duckweed turion starch. The turion starch obtained by using the method of the present disclosure has a high purity and a high extraction rate. The purity reaches 93% or above with the highest purity of 96.54% or above. The extraction rate reaches 85% or above.