Integrated Pulp Process Lipid Enzyme Production
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current pulp and paper industry processes face inefficiencies in utilizing hemicellulose and lignocellulosic biomass, with high energy loss and costly enzyme production for biofuel production, while single-cell oil production from lignocellulosic feedstocks has low lipid yields and high process costs.
Innovation Solution
An integrated process system where microorganisms produce both lipids and enzymes from pulp and paper industry residues, utilizing these enzymes for pulp processing and reducing external enzyme purchases, thereby enhancing biofuel production efficiency and valorizing hemicellulose streams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If hemicellulose is combusted in recovery boilers to produce energy, then energy production is improved, but resource valorization is worsened due to loss of potential high-value products
Solution Approach 1:
The invention segments the hemicellulose utilization pathway by separating energy production (from lignin) from chemical product production (from hemicellulose). Hemicellulose is extracted and purified separately from lignin, allowing it to be directed to fermentation processes for producing chemicals and biofuels, while lignin is combusted for energy. This segmentation enables both energy production and high-value product valorization without competition for the same resource.
Solution Approach 2:
The invention applies extraction by removing hemicellulose from the black liquor stream before combustion. Hemicellulose is extracted from wood chips or pulp using water or aqueous solutions, separating it from lignin and other components. This extracted hemicellulose is then purified and directed to fermentation processes, while the remaining lignin-rich stream is combusted for energy production.
2Reliability
If enzymes are purchased externally for biofuel production, then production reliability is improved, but process costs are worsened due to high enzyme purchase costs
Solution Approach 1:
The invention applies self-service by enabling the fermentation process to produce its own required enzymes through integrated enzyme production capabilities. The system includes components for producing cellulases, hemicellulases, and other hydrolytic enzymes either within the same facility or through coordinated production, eliminating or reducing the need to purchase external enzymes. This self-service approach reduces dependency on external suppliers and lowers operational costs.
Solution Approach 2:
The invention merges the enzyme production function with the biofuel production process. Rather than treating enzyme production and fermentation as separate operations, the system integrates them so that enzyme production occurs within the same facility and is directly coupled to the fermentation process. This merging allows for optimized resource utilization and reduced overall process costs.
3Loss of substance
If hemicellulose pre-extraction is performed before pulping, then hemicellulose valorization is improved, but pulp yield is worsened due to removal of hemicellulose
Solution Approach 1:
The invention applies extraction by selectively removing hemicellulose from wood chips or pulp using water or aqueous solutions under controlled conditions. This extraction targets hemicellulose specifically while preserving cellulose and lignin structures. The extracted hemicellulose is then purified and directed to fermentation processes for producing chemicals and biofuels, while the remaining pulp maintains its structural integrity and yield.
Solution Approach 2:
The invention applies parameter changes by optimizing extraction conditions (temperature, pressure, pH, extraction time) to maximize hemicellulose removal while minimizing impact on pulp yield and quality. By carefully controlling these parameters, the process achieves selective hemicellulose extraction without excessive loss of cellulose or degradation of pulp properties.
4Loss of substance
If single cell oil production uses lignocellulosic feedstocks, then resource utilization is improved, but lipid yield is worsened due to low conversion efficiency
Solution Approach 1:
The invention applies preliminary action by performing extensive pretreatment and hydrolysis of lignocellulosic feedstocks before feeding to microorganisms. This includes mechanical pretreatment, enzymatic hydrolysis, and chemical treatments that break down complex lignocellulosic structures into simpler, more bioavailable forms. This preliminary processing increases the accessibility of carbon substrates to microorganisms, thereby improving lipid production efficiency.
Solution Approach 2:
The invention applies intermediary by introducing hydrolyzed sugar solutions as an intermediate substrate between the lignocellulosic feedstock and the lipid-producing microorganisms. The complex lignocellulosic material is first converted into simpler sugar molecules through hydrolysis, which then serve as readily available carbon sources for microbial lipid production. This intermediary step bridges the gap between recalcitrant feedstock and microbial uptake mechanisms.
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 approach improves cost-efficiency in pulp and paper industries by valorizing hemicellulose streams, reduces enzyme costs, and enhances energy efficiency by utilizing enzymes produced on-site, leading to more complete biomass utilization and lower environmental impact.
Implementation Method 1
a microorganism capable of producing lipids or lipids and enzymes when cultivated on a medium comprising organic material from pulp and/or paper industry
Implementation Method 2
producing lipids or lipids and enzymes by said microorganisms
Data Source
AI summary
The present invention relates to an integrated process, which comprises a single cell oil production process, and a pulp and/or paper industry process. The process comprises that in the single cell oil production process is used a microorganism capable of producing lipids or lipids and enzymes when cultivated on a medium comprising organic material from pulp and/or paper industry. Lipids or lipids and enzymes are produced by said microorganisms in the single cell oil production process and/or in a process connected into it. The present invention relates also to use of lipids produced in the process as biofuel or as a component of biofuel or as a starting material for biofuel production and use of enzymes produced in the lipid production process in pulp and/or paper industry or in other applications as an enzyme preparation or as a source of enzymes.