Bast Plant Retting Using Mixed Microbial Inoculum
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing retting processes for bast plant fibers are inefficient in terms of processing time, fiber quality, and wastewater treatment, particularly due to high organic compound concentrations, which require large water usage and result in inferior fiber quality and significant environmental impact.
Innovation Solution
A retting process using a mixed inoculum of microorganisms from fruit waste and baking yeast, combined with biological wastewater treatment by symbiotic cultures, operates at a hydromodule of 1:17, 30°C, and pH 4.5, accelerating fiber separation in 48 hours and enabling wastewater reuse without environmental pollutants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If water retting is used to separate fibers from stems, then fiber quality is improved, but processing time increases and large amounts of water are required
Solution Approach 1:
The patent changes the chemical parameters of the retting medium by adding organic acids (acetic acid, citric acid, lactic acid) and controlling pH levels (maintaining pH between 3-6), which accelerates the degradation of pectin and hemicellulose. This chemical parameter modification enables faster fiber separation while maintaining quality, reducing processing time from traditional weeks to controlled periods without requiring excessive water volumes.
Solution Approach 2:
The patent introduces organic acids as intermediary substances that mediate the retting process. These acids act as catalysts that accelerate the microbial degradation of binding materials between fibers and stems. The acids create optimal conditions for controlled rotting, enabling faster separation while maintaining fiber integrity and quality, thus resolving the contradiction between speed and quality.
2Manufacturing precision
If water retting is used to separate fibers from stems, then fiber quality is improved, but water consumption increases and wastewater treatment is required
Solution Approach 1:
The patent modifies the chemical composition of the retting medium by adding organic acids and controlling pH, which intensifies the retting process. This allows achieving the same fiber separation quality with reduced water volumes. The concentrated chemical environment accelerates degradation reactions, enabling efficient retting with less water and consequently reducing wastewater treatment requirements.
Solution Approach 2:
The patent converts the potentially harmful effect of organic waste into a beneficial retting agent. By using organic acids derived from natural sources (fruit wastes, yogurt, cheese whey), the process transforms waste materials into useful retting chemicals. This approach reduces the need for large water volumes while maintaining effective fiber separation, and the organic nature of these acids makes wastewater more biodegradable and easier to treat.
3Loss of substance
If traditional dew retting is used, then water consumption is reduced, but processing time increases significantly and fiber quality is inferior
Solution Approach 1:
The patent applies parameter changes by introducing organic acids and controlling pH levels to accelerate the retting process. This creates optimal chemical conditions for rapid degradation of binding materials, enabling the process to complete in controlled timeframes rather than taking weeks. The result is improved productivity and fiber quality while maintaining reduced water consumption compared to traditional water retting methods.
4Loss of substance
If traditional dew retting is used, then water consumption is reduced, but fiber quality is inferior due to uncontrolled microbial activity
Solution Approach 1:
The patent changes the chemical parameters by adding organic acids and maintaining pH between 3-6, which creates controlled conditions for microbial activity. This pH control selects for beneficial microorganisms that produce specific enzymes for degrading pectin and hemicellulose, while inhibiting harmful putrefactive bacteria. The result is superior fiber quality with characteristics like whiteness, flexibility, and strength, all while consuming minimal water compared to traditional methods.
Solution Approach 2:
The patent introduces organic acids as intermediary substances that mediate and control microbial activity during retting. These acids create an environment that promotes the growth of beneficial microorganisms while suppressing harmful ones. This controlled microbial ecosystem achieves superior fiber quality through selective degradation of binding materials, all while maintaining low water consumption levels.
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 achieves a 30% extraction yield of high-quality fibers within 48 hours, inhibits putrefactive bacteria, and allows for wastewater reuse, providing an ecological, economical, and sustainable solution by controlling microbial species and eliminating secondary compounds that affect fiber quality.
Implementation Method 1
Retting is a microbial process through which the chemical bonds which connect the fibers and the ligneous part of the stem are broken
Implementation Method 2
The present invention proposes a complete solution for the retting process of bast plant stems in vats, by using an ecological treatment formula with mixed inoculum of microorganisms
Implementation Method 3
The biological treatment process of waste water consists of adding the symbiotic culture mentioned above at a rate of 1:1000 (in relation to the fleet) to the waste water
Implementation Method 4
in a pH 4,5 buffer medium composed of citric acid /sodium citrate
Data Source
AI summary
The procedure, according to the invention, consists of the fact that the retting of bast plant stems is done in vats by using a mixed inoculum of microorganisms from a substrate of seedy fruit and citric waste and baker's yeast (S. cerevisiae), with added AlK(SO4)2 in a buffer medium with a pH of 4,5 achieved using citric acid/potassium citrate, for a period of 48 hours at a temperature of 30°C, and a hydromodule of HM 1:17. Waste water treatment is done through adding a symbiotic culture composed of yeasts and acetic bacteria in a concentration of 1:1000 compared to the fleet. The treatment phase consists of maintaining this culture in the waste water for 3-4 days at ambient temperature, after which the culture is removed and the water is reinserted into the technological process or if discharged. Using this procedure, an extraction yield of +/- 30% superior quality fibers is ensured, as well as the possibility of reusing waster in the process.