Phycocyanin Purification via Chitosan Flocculation
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Solution Overview
Problem
Existing methods for preparing phycocyanin from cyanobacteria result in low filtration rates and insufficient purity, making it difficult to integrate sterilization steps and leading to the need for immediate drying, which complicates the production process.
Innovation Solution
A method involving the addition of chitosan and activated carbon to a suspension of cyanobacteria, followed by filtration, which improves flocculation and impurity removal, allowing for efficient separation and integration of sterilization steps without the need for drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If calcium phosphate is used as a flocculant, then flocculation occurs, but filtration rate becomes very low and purity is insufficient
Solution Approach 1:
The patent changes the chemical parameters of the flocculant from calcium phosphate to chitosan, adjusting the concentration to 0.01-1% by weight. This parameter change resolves the contradiction by achieving both high purity (through effective impurity removal) and high filtration rate (through optimized chitosan concentration that prevents excessive gel formation)
Solution Approach 2:
The patent uses a composite approach by combining chitosan with activated carbon in specific concentration ranges. This composite material strategy enhances both purification effectiveness and filtration performance, resolving the contradiction between purity and filtration rate
2Reliability
If centrifugation is carried out to remove impurities, then some impurities are removed, but impurities cannot be removed satisfactorily
Solution Approach 1:
The patent changes the separation mechanism from centrifugal force to chemical flocculation followed by filtration. By adjusting chitosan concentration to 0.01-1% by weight, the method achieves satisfactory impurity removal that centrifugation cannot accomplish, while maintaining efficient processing
3Ease of manufacture
If phycocyanin-containing solution with high impurity concentration is filtered, then filtration occurs, but clogging occurs and sterilization cannot be integrated
Solution Approach 1:
The patent applies preliminary flocculation treatment with chitosan (0.01-1% by weight) to remove impurities before filtration and sterilization steps. This preliminary action prevents clogging during subsequent filtration and enables sterilization to be integrated into the process, resolving the contradiction between ease of manufacture and filtration processability
4Reliability
If drying is performed immediately after phycocyanin extraction, then sterilization can be performed on dried product, but production process becomes complicated
Solution Approach 1:
The patent performs preliminary impurity removal through chitosan flocculation and filtration before sterilization. This allows sterilization to be performed on the liquid phycocyanin product directly without drying, simplifying the production process while maintaining sterilization effectiveness through the integrated filtration-sterilization approach
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
This method enhances the filtration rate, reduces impurities, and enables the production of high-quality phycocyanin with improved dye component collection, allowing for sterilization at an early stage and simplifying the production process by omitting unnecessary steps, particularly in the production of liquid products.
Implementation Method 1
adding chitosan to a suspension of cyanobacteria containing phycocyanin
Implementation Method 2
adding chitosan and activated carbon to a suspension of cyanobacteria containing phycocyanin
Implementation Method 3
filtering the suspension
Data Source
AI summary
Provided is a preparation method for phycocyanin, including: adding chitosan to a suspension of cyanobacteria containing phycocyanin; and filtering the suspension.