Lactic Acid Production from Organic Waste via Microbial Consortium
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing lactic acid are costly and inefficient, often requiring sterilization and enzyme addition, and rely on single microorganisms, which can lead to contamination and increased production overhead.
Innovation Solution
A method involving a microbial community, such as Firmicutes, Bacteroides, and Spirochetes, that ferments organic waste like food waste without sterilization or enzyme addition, adjusting pH and temperature to produce lactic acid efficiently, eliminating the need for sterilization and enzyme treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sterilization and enzyme addition are used in lactic acid production, then production reliability is improved, but production cost increases
Solution Approach 1:
The patent employs a microbial consortium that performs self-sterilization through competitive exclusion and produces its own enzymes for biomass degradation. The diverse microbial community naturally suppresses contaminants and generates necessary hydrolytic enzymes, eliminating the need for external sterilization and enzyme addition while maintaining production reliability
Solution Approach 2:
The patent uses a composite microbial consortium consisting of multiple species including lactic acid bacteria, cellulolytic bacteria, and other degradative microorganisms. This composite community combines the functions of sterilization, enzyme production, and lactic acid generation in a single system, reducing overall production costs while maintaining reliability
2Manufacturing precision
If a single microorganism is used for lactic acid production, then manufacturing precision is improved, but contamination risk increases
Solution Approach 1:
The patent merges multiple microbial species into a functional consortium where lactic acid bacteria specialize in producing lactic acid with high precision, while other microorganisms handle biomass degradation and contaminant suppression. This division of labor maintains manufacturing precision while enhancing contamination resistance through the community's collective immunity
Solution Approach 2:
The patent converts the potential harm of using a complex microbial community into a benefit by designing a consortium where diverse species compete for resources, naturally suppressing contaminants. The complexity becomes a protective mechanism rather than a source of unpredictability, maintaining precision while improving reliability
3Ease of manufacture
If organic waste is used as feedstock, then production cost is reduced, but production efficiency decreases
Solution Approach 1:
The patent applies preliminary mechanical disruption to reduce organic waste particle size before fermentation, increasing surface area and making substrates more accessible to microbes. This pre-treatment step enhances the efficiency of subsequent fermentation without adding significant cost, bridging the gap between low-cost feedstock and high productivity
Solution Approach 2:
The patent optimizes fermentation parameters including pH control, temperature maintenance, and aeration rates to maximize lactic acid production efficiency from organic waste. By carefully controlling these parameters, the system achieves high productivity despite using complex, low-cost organic waste feedstock rather than refined sugars
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 results in high yields of lactic acid (60-100 grams per liter) from low-cost organic waste, reducing production costs and minimizing unwanted side products, while avoiding contamination issues associated with single microbe systems.
Implementation Method 1
contacting organic waste with a microbial community to form a fermentation mixture, and fermenting the fermentation mixture under controlled pH and temperature conditions for a time sufficient to produce lactic acid
Data Source
AI summary
Aspects of the invention relate to methods for producing lactic acid from organic waste, comprising contacting organic waste with a microbial community to form a fermentation mixture, and fermenting the fermentation mixture under controlled pH and temperature conditions for a time sufficient to produce lactic acid.