Biopolymer Extraction from Granular Sludge via pH Adjustment
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Solution Overview
Problem
Current methods for extracting biopolymers from granular sludge result in products with insufficient purity and high lipid content, limiting their applications due to partial discoloration and energy-intensive processes.
Innovation Solution
A method involving pH adjustment with Cl2, OCl-, or H2O2, followed by physical separation and optimization steps such as sieving, water removal, and temperature control, to extract anionic biopolymers with improved lipid content and purity, enabling effective discoloration and enhanced application possibilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If biopolymers are extracted from granular sludge using conventional methods, then biopolymers are obtained, but the extracted biopolymers have insufficient purity and high lipid content
Solution Approach 1:
The patent applies parameter changes by adjusting pH levels and temperature conditions during extraction. Specifically, the method uses pH adjustment to precipitate impurities while maintaining biopolymer solubility, and temperature control to optimize extraction efficiency while minimizing lipid co-extraction. These parameter modifications enable selective extraction of biopolymers with higher purity and lower lipid content.
Solution Approach 2:
The patent implements local quality by creating different extraction conditions for different components. By controlling pH gradients and temperature zones during the extraction process, the method selectively targets biopolymers while leaving lipids and other impurities behind. This localized optimization of extraction conditions achieves high purity biopolymer extraction.
2Manufacturing precision
If biopolymers are extracted with high purity requirements, then product quality improves, but extraction process becomes more complex and energy-intensive
Solution Approach 1:
The patent applies preliminary action by performing pH adjustment and temperature optimization before the main extraction step. The method pre-treats the granular sludge by adjusting pH to precipitate impurities and then performs extraction under optimized temperature conditions. This preliminary preparation simplifies the subsequent extraction process and reduces the need for complex purification steps.
Solution Approach 2:
The patent uses parameter changes to simplify the extraction process while maintaining high purity. By optimizing pH and temperature parameters, the method achieves selective extraction that requires minimal additional purification steps. The controlled parameter changes enable a straightforward extraction protocol that is both simple and effective.
3Quantity of substance
If conventional extraction methods are used, then biopolymers are obtained, but the process requires huge volumes of solvents and large amounts of energy for evaporation
Solution Approach 1:
The patent replaces the mechanical evaporation process with a pH-based precipitation method. Instead of using large volumes of solvents that require energy-intensive evaporation, the method uses pH adjustment to precipitate biopolymers directly from the aqueous phase. This substitution eliminates the need for solvent recovery through evaporation, dramatically reducing energy consumption.
Solution Approach 2:
The patent applies self-service by using the biopolymers' own chemical properties (pH-dependent solubility) to facilitate their separation. The method exploits the natural pH sensitivity of biopolymers to cause self-precipitation, eliminating the need for external energy input for evaporation. The system uses the inherent properties of the biopolymers to drive the separation process.
4Ease of operation
If biopolymers are extracted without pH adjustment, then extraction is simpler, but the biopolymers retain discoloration and impurities
Solution Approach 1:
The patent applies parameter changes by adjusting pH to a specific range that optimizes both biopolymer precipitation and color removal. The method uses controlled pH adjustment to precipitate biopolymers while simultaneously removing colored impurities through selective solubility changes. This single parameter modification achieves both purification and decolorization in one step.
Solution Approach 2:
The patent implements preliminary action by performing pH adjustment before extraction to pre-conditions the system for optimal biopolymer recovery. The pH adjustment step prepares the solution by precipitating impurities and optimizing biopolymer solubility, making the subsequent extraction simpler and more effective. This preliminary preparation maintains ease of operation while ensuring high purity results.
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 biopolymers with higher lipid content and improved purity, allowing for broader applications and reduced energy consumption, overcoming the limitations of prior art by enabling effective extraction and utilization of biopolymers from granular sludge.
Implementation Method 1
the pH is increased by addition of at least 1-20% v/v of at least one of Cl2, OCl— and H2O2
Implementation Method 2
addition of at least 1-20% v/v of at least one of Cl2, OCl— and H2O2. The addition of the Cl2, OCl— or H2O2 is found to cause discoloration of the biopolymer
Implementation Method 3
Granules making up granular sludge can be readily removed from a reactor by e.g. physical separation, settling, centrifugation, cyclonic separation, decantation, filtration, or sieving
Implementation Method 4
Granules making up granular sludge can be readily removed from a reactor by e.g. physical separation, settling, centrifugation, cyclonic separation, decantation, filtration, or sieving
Implementation Method 5
The extraction is preferably carried out under mixing, such as by stirring. After increasing the pH the biopolymer may be extracted by one or more subsequent steps
Data Source
AI summary
In a prior art reactor set up dense aggregates of microorganisms are formed, typically in or embedded in an extracellular matrix. Such may relate to granules, to sphere like entities having a higher viscosity than water, globules, a biofilm, etc. The dense aggregates comprise extracellular polymeric substances, or biopolymers, in particular linear polysaccharides. The present invention is in the field of extraction of a biopolymer from a granular sludge, a biopolymer obtained by such method, and a use of such method.