Partially Lysed Microalgae for Lipid Bioaccessibility
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Solution Overview
Problem
Microalgae-based products face challenges with limited lipid bioaccessibility and oxidative stability due to intact cell walls, which hinder the nutritional value and flavor of omega-3 PUFAs.
Innovation Solution
A method involving pulsed electric field (PEF) treatment and enzymatic processing of microalgae cell walls to create partially lysed microalgae, enhancing bioaccessibility and stability, specifically by preparing a suspension of microalgae, applying a PEF with controlled energy input, and optionally adding enzymes like chitinase or galactanase to break down polysaccharides, resulting in a biomass suitable for human consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cell wall structure is maintained intact, then oxidative stability is improved, but lipid bioaccessibility deteriorates
Solution Approach 1:
The patent applies partial lysis by controlling PEF treatment parameters (electric field strength, pulse duration, number of pulses) to achieve only partial disruption of the cell wall structure. This partial action allows sufficient lipid bioaccessibility improvement while maintaining enough structural integrity to preserve oxidative stability, avoiding complete cell wall destruction that would compromise stability.
Solution Approach 2:
The patent optimizes multiple parameters including electric field strength (10-30 kV/cm), pulse duration (1-50 μs), pulse number (1-30), and incubation conditions (temperature, time, pH) to control the degree of cell wall lysis. By adjusting these parameters, the process achieves the optimal balance between bioaccessibility enhancement and oxidative stability maintenance.
2Ease of operation
If the cell wall is completely lysed, then lipid bioaccessibility is improved, but oxidative stability deteriorates
Solution Approach 1:
The patent deliberately avoids complete cell wall lysis by controlling PEF treatment to achieve only partial disruption. This partial action is sufficient to improve lipid bioaccessibility while preserving enough cell wall structure to maintain oxidative stability, preventing the harm of complete lysis.
Solution Approach 2:
The patent performs preliminary controlled lysis through PEF treatment before final product formation. This preliminary action prepares the cell wall structure to a specific degree of disruption that optimizes both bioaccessibility and stability, preventing excessive lysis that would compromise oxidative stability.
3Ease of operation
If enzymatic treatment is applied to break down polysaccharides, then lipid bioaccessibility is improved, but process complexity increases
Solution Approach 1:
The patent uses enzymes (chitinase, galactanase, cellulase, pectinase) as intermediaries to selectively break down polysaccharide components of the cell wall. These enzymes act as mediators that facilitate controlled degradation of specific cell wall components without requiring complex mechanical or chemical processing systems, thereby improving bioaccessibility while managing process complexity.
Solution Approach 2:
The patent replaces intensive mechanical disruption methods with enzymatic treatment to achieve cell wall modification. This substitution uses biochemical processes instead of mechanical force, providing more selective and controlled lysis while potentially reducing the need for complex mechanical equipment and associated complexity.
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
The method significantly improves lipid bioaccessibility and oxidative stability, maintaining nutritional value and flavor by partially disrupting the cell wall, allowing easier digestion and reducing oxidation, as demonstrated by increased lipid extractability and bioaccessibility while preserving cellular integrity.
Implementation Method 1
applying a pulsed electric field to a suspension of microalgae and forming a biomass of partially lysed microalgae
Implementation Method 2
adding enzyme to the suspension of microalgae... wherein the enzyme is a galactanase, for example endo-1,4-β-galactanase
Data Source
AI summary
The invention relates to a method of making a product for human consumption which comprises partially lysed microalgae, said method comprising a) preparing a suspension of microalgae, wherein the microalgae belong to a phylaselected from Chlorophyta, Ochrophyta, and Heterokonta; b) applying a pulsed electric field to the suspension of microalgae, wherein said pulsed electric field has a specific energy input between 25 to 150 kJ per kg suspension (kg sus−1); c) optionally treating the microalgae with enzyme; d) incubating the biomass suspension at 300 rpm, 4-37° C. for 6-48 h e) forming a biomass of partially lysed microalgae; and f) adding the biomass of partially lysed microalgae to a product for human consumption.