Continuous Enzyme Addition for Fermentation Process Control
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Solution Overview
Problem
Existing methods for controlling the fermentation process in biofuel production plants result in decreased ethanol production, inefficient yeast use, and longer turnaround times due to inadequate control over the fermentation process variables.
Innovation Solution
A method and system for controlling batch fermentation processes in biofuel production plants by continuously adding amylolytic enzymes to fermenters, with the enzyme addition being controlled based on monitored parameters to optimize yeast activity and ethanol production, using a combination of enzyme additive systems and control systems that integrate continuous enzyme addition with batch fermentation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional batch fermentation control methods are used, then the process is simpler to operate, but ethanol production decreases and yeast use becomes inefficient
Solution Approach 1:
The patent implements a feedback control system where process parameters (temperature, pH, dissolved oxygen, foam level) are continuously monitored and used to adjust enzyme addition rates. The controller receives signals from sensors and automatically modulates pump speeds to maintain optimal fermentation conditions, resolving the contradiction by using automated feedback to achieve high productivity without manual intervention complexity
Solution Approach 2:
The system enables self-regulating fermentation control where the controller automatically adjusts enzyme addition based on real-time parameter monitoring without operator intervention. The system serves itself by using sensor data to autonomously optimize fermentation conditions, achieving high ethanol production while simplifying operational complexity through automation
2Loss of time
If traditional fermentation control is used, then fewer resources are required, but turnaround time increases and yeast efficiency decreases
Solution Approach 1:
The patent employs dynamic enzyme addition where pump speeds and flow rates are continuously adjusted based on real-time fermentation parameter monitoring. Instead of fixed batch-wise enzyme addition, the system dynamically modulates enzyme delivery to match the instantaneous needs of the fermentation process, reducing turnaround time while optimizing enzyme utilization efficiency
Solution Approach 2:
The system changes operational parameters (enzyme addition rate, pump speed, flow rate) in real-time based on monitored fermentation conditions. By dynamically adjusting these parameters rather than using fixed quantities, the system reduces batch turnaround time while maintaining optimal yeast efficiency and enzyme utilization
3Productivity
If continuous enzyme addition is implemented, then yeast productivity increases, but the control system becomes more complex
Solution Approach 1:
The patent employs a multi-functional control system that simultaneously monitors multiple parameters (temperature, pH, dissolved oxygen, foam level) and controls multiple functions (enzyme addition, aeration, agitation, cooling) through a single integrated controller. This universal approach increases yeast productivity while managing system complexity through consolidation rather than proliferation of separate control devices
Solution Approach 2:
The controller acts as an intermediary between sensor inputs and actuator outputs, translating raw sensor data into coordinated control actions for enzyme addition and other fermentation parameters. This intermediary function manages system complexity by centralizing the decision-making logic while enabling sophisticated multi-parameter optimization that boosts yeast productivity
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 enhances yeast productivity, reduces fermenter fill and batch times, and increases biofuel yield with a substantially unchanged quantity of inputs, leading to improved efficiency and productivity in biofuel production.
Implementation Method 1
yeast ferments glucose released by action of the amylolytic enzyme on the mash
Implementation Method 2
yeast ferments glucose released by action of the amylolytic enzyme on the mash to produce ethanol
Data Source
AI summary
A method for controlling a fermentation process includes injecting a mash into a fermenter and injecting an enzymatic additive into the fermenter on a continuous basis. The enzymatic additive is injected on a continuous basis during at least two time periods: during a batch fill and after the batch fill. The method may be used to control the fermentation processes of one or more fermenters operating in parallel.