Pulsed Electric Field Extraction of Aquatic Plant Lipids
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Solution Overview
Problem
Conventional methods for producing biofuels from small aquatic plants, such as algae, are inefficient and costly due to the difficulty in continuously extracting oil and lipids, often requiring dangerous and expensive chemicals like hexane or supercritical CO2, and existing pulsed electric field (PEF) technologies have not been utilized for this purpose.
Innovation Solution
A PEF method involving a continuous flow of small aquatic plants through a treatment zone where pulsed electric fields with optimized magnitudes and pulse widths are applied to lyse cell walls, enhancing the extraction of oil, lipids, and other valuable compounds, using a system with high voltage electrodes and pulse modulators to minimize energy consumption and maximize extraction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional methods using hexane or supercritical CO2 are used for extraction, then extraction efficiency is improved, but operational cost and safety risks increase
Solution Approach 1:
The patent replaces chemical extraction systems (hexane, supercritical CO2) with a pulsed electric field system that uses electrical pulses to lyse cell walls and release oil and lipids. This substitution eliminates the need for expensive and dangerous chemicals while maintaining effective extraction, directly resolving the contradiction between extraction efficiency and operational cost/safety
Solution Approach 2:
The patent changes the extraction parameter from chemical concentration to electrical field strength, applying pulsed electric fields with optimized magnitudes and pulse widths to achieve cell lysis. This parameter change enables continuous extraction without the costs and safety issues associated with chemical methods
2Quantity of substance
If conventional batch processing methods are used, then extraction completeness is improved, but continuous production capability deteriorates
Solution Approach 1:
The patent implements continuous flow processing where slurry of small aquatic plants flows continuously through a treatment zone subjected to pulsed electric fields. This continuous action maintains extraction completeness while enabling continuous production, resolving the contradiction between extraction completeness and continuous production capability
Solution Approach 2:
The patent uses periodic pulsed electric fields applied continuously to the flowing slurry. The periodic pulses effectively lyse cell walls throughout the continuous process, maintaining extraction completeness while enabling continuous production capability
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 enables cost-effective, continuous extraction of biofuel components like EPA oil, DHA oil, and antioxidants, reducing operational costs by approximately $1.71 per gallon compared to conventional methods, while ensuring safety by avoiding toxic chemicals.
Implementation Method 1
PEF treatment is a process which uses short, high voltage pulses of electricity and a specialized treatment chamber to disrupt cell membranes in a process called electroporation
Data Source
AI summary
A pulsed electric field method for the continuous extraction of oil and lipids from small aquatic plants, the method including providing a continuous flow of a slurry of small aquatic plants. A continuous flow of small aquatic plants is directed to a treatment zone. Pulsed electric fields are applied to the treatment zone to lyse cell walls of the small aquatic plants to enhance extraction of oil and lipids therefrom.