Cellulose Saccharification Torque Control for Surfactant Dosing
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Solution Overview
Problem
Excessive addition of surfactant in cellulose saccharification processes can hinder enzyme reaction by reducing contact between cellulose and enzyme, leading to inefficient saccharification.
Innovation Solution
A method involving the introduction of water, cellulose, and a surfactant into a saccharification vessel, followed by agitation with an impeller, where torque is monitored to determine optimal surfactant and enzyme introduction times, ensuring minimal surfactant use and efficient enzyme activity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If surfactant is added to facilitate cellulose immersion in reaction solution, then cellulose wetting is improved, but excessive surfactant coverage suppresses enzyme-cellulose contact and reduces saccharification efficiency
Solution Approach 1:
The patent applies preliminary action by adding a small initial amount of surfactant before enzyme addition to facilitate cellulose immersion and dispersion. This preliminary surfactant addition ensures proper mixing and contact between cellulose particles and the reaction solution, while the controlled small dosage prevents excessive coverage that would later inhibit enzyme activity. The surfactant is added in advance at a controlled level to prepare the system for optimal enzyme action.
Solution Approach 2:
The patent applies parameter changes by precisely controlling the surfactant concentration within a specific range (0.01-1 wt% relative to cellulose). By adjusting the surfactant parameter to this optimal range, the system achieves sufficient cellulose wetting and dispersion without exceeding the threshold where surfactant coverage begins to suppress enzyme-cellulose contact. This parameter optimization resolves the contradiction between immersion facilitation and saccharification efficiency.
2Area of stationary object
If excessive surfactant is added to increase cellulose surface area contact, then cellulose dispersion is improved, but enzyme-cellulose contact is suppressed and enzyme reaction is hindered
Solution Approach 1:
The patent applies partial action by adding only a small, controlled amount of surfactant (0.01-1 wt% relative to cellulose) rather than excessive amounts. This partial addition is sufficient to achieve the necessary cellulose dispersion and surface area exposure, while avoiding the harmful effects of excessive surfactant coverage. The controlled partial addition optimizes the balance between dispersion improvement and enzyme reaction maintenance.
3Quantity of substance
If surfactant is used to enhance cellulose accessibility, then mass transfer is improved, but enzyme activity is reduced due to surfactant-enzyme interaction
Solution Approach 1:
The patent applies parameter changes by precisely controlling the surfactant concentration within a specific range (0.01-1 wt% relative to cellulose) and the enzyme addition timing (after surfactant and pH adjustment). By adjusting these parameters, the system achieves sufficient cellulose accessibility and mass transfer while maintaining enzyme activity. The controlled parameter range prevents harmful surfactant-enzyme interactions while ensuring proper substrate accessibility.
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
Facilitates cellulose saccharification by minimizing surfactant interference, enhancing enzyme reaction efficiency, and reducing reaction hindrance, while optimizing surfactant and enzyme introduction.
Implementation Method 1
an agitation step of agitating the liquid mixture due to rotation of an impeller portion
Implementation Method 2
it is conjectured that using a surfactant enables the cellulose to be readily immersed in the reaction solution
Implementation Method 3
a saccharification step of performing a saccharification reaction in the liquid mixture
Data Source
AI summary
A cellulose saccharification method including an introduction step of introducing water, a raw material containing cellulose, and a surfactant into a saccharification vessel so as to obtain a liquid mixture, an agitation step of agitating the liquid mixture due to rotation of an impeller portion, and a detection step of detecting a torque sensed by the impeller portion, wherein regarding the agitation step, after agitation is performed until an amount of the torque changed in a unit time period becomes less than or equal to a predetermined value, when the torque is more than or equal to a threshold value, the surfactant is additionally introduced into the liquid mixture, or when the torque is less than the threshold value, a pH adjuster and an enzyme are introduced into the liquid mixture.