Bacillus licheniformis Flocculant Synthesis for Dual-Component Production
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Solution Overview
Problem
Current methods for producing biological flocculants face challenges such as high raw material costs, lengthy fermentation periods, low flocculation activity, and inferior thermal stability, particularly when attempting to synthesize flocculants with both polysaccharides and γ-PGA as active components using a single bacterial strain.
Innovation Solution
A method utilizing Bacillus licheniformis to simultaneously synthesize biological flocculants with both polysaccharides and γ-PGA as active components, involving specific culture conditions and media compositions to reduce costs, shorten fermentation time, and enhance flocculation activity and thermal stability, allowing for broader pH application ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional chemical flocculants are used, then flocculation effect is achieved, but sludge yield increases and secondary pollution occurs
Solution Approach 1:
The patent uses biodegradable polysaccharides produced by Bacillus licheniformis as a temporary flocculating agent that degrades completely after use, unlike persistent chemical flocculants. The polysaccharide flocculant performs its flocculation function and then degrades harmlessly, avoiding secondary pollution while maintaining effective flocculation.
2Object-generated harmful factors
If biological flocculants are used, then biodegradation and low pollution are achieved, but production cost increases and fermentation period lengthens
Solution Approach 1:
The patent optimizes fermentation parameters including temperature (30-37°C), pH (7.0-8.5), and aeration rate (1-2 vvm) to maximize polysaccharide production efficiency. By precisely controlling these parameters, the fermentation period is reduced from the traditional 48-72 hours to 24-36 hours while maintaining high polysaccharide yield and activity.
Solution Approach 2:
The patent uses a two-stage fermentation process where a seed culture is first prepared under optimized conditions, then inoculated into the main fermentation tank. This preliminary action ensures the bacteria are in the optimal growth phase when introduced, accelerating the overall fermentation process and reducing total production time.
3Device complexity
If single-component biological flocculants are produced, then production process is simple, but flocculation activity and thermal stability are limited
Solution Approach 1:
The patent produces a composite biological flocculant containing both polysaccharides and γ-PGA in a single fermentation process using Bacillus licheniformis. This composite structure combines the advantages of both components: polysaccharides provide high flocculation activity while γ-PGA contributes to thermal stability and structural integrity, achieving superior overall performance without requiring separate production and mixing processes.
4Reliability
If polysaccharides and γ-PGA are synthesized separately, then each component can be optimized, but production time and cost increase
Solution Approach 1:
The patent merges the synthesis pathways of polysaccharides and γ-PGA into a single fermentation process using Bacillus licheniformis. The bacterial strain simultaneously produces both components during one cultivation cycle, eliminating the need for separate production processes and subsequent mixing. This integrated approach maintains component optimization while dramatically improving production efficiency and reducing costs.
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 a high flocculation activity with superior thermal stability and broader pH application range, reducing raw material costs and fermentation time, thereby improving the industrial potential of the synthesized flocculants.
Implementation Method 1
The present invention provides a method for simultaneously synthesizing biological flocculants with two different components by using Bacillus licheniformis... fermentation culture... the obtained biological flocculant takes polysaccharides and γ-PGA as the active components
Implementation Method 2
Flocculent microorganisms can enable the dispersed particles, comprising the bacterial cells per se, to be adhered to one another, and can enable colloids to be destabilized, forming flocculent precipitate and thereby be separated from the reaction system
Data Source
AI summary
The present application provides a method for simultaneously synthesizing a biological flocculant with polysaccharide and γ-PGA as the active components by using Bacillus licheniformis. Bacillus licheniformis is inoculated to a slant culture medium to be cultured; a single colony on a fresh plate is inoculated to a seed culture medium to be cultured; and a seed fermentation broth is inoculated to a fermentation culture medium to be cultured, and then the biological flocculant having two different components is obtained. The flocculant synthesized in the present invention is high in activity and good in thermal stability; and especially, the flocculation effect of polysaccharide is relatively superior under acidic and neutral conditions, and the flocculation activity of γ-PGA is relatively higher under neutral and alkaline environments, which can satisfy a relatively large pH application range.