Algae Cultivation Using Acetic Acid for High-Density Growth
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Solution Overview
Problem
The high cost of producing algae for both human consumption and pharmaceutical use is a barrier due to the need for high-quality production standards, which often requires enclosed fermentation vessels, increasing capital and energy costs.
Innovation Solution
An improved method for the aerobic, heterotrophic cultivation of Chlamydomonas species to achieve high-density cultures, reaching target densities of 50-200 g/L dry cell weight, using a method that involves inoculating a production culture with a pure culture, growing it aerobically at controlled pH and temperature, and feeding with a medium supplemented with glacial acetic acid to maintain pH and support high growth rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If algae are grown in enclosed fermentation vessels to meet high-quality production standards, then product quality and safety are improved, but capital costs and energy costs increase significantly
Solution Approach 1:
The patent extracts algae cultivation from enclosed fermentation vessels to open pond systems, removing the containment structure while maintaining product quality through controlled breeding programs and selective harvesting. This extraction eliminates capital-intensive equipment while preserving the ability to produce high-quality algal biomass for feed and other applications.
Solution Approach 2:
The patent employs simple, low-cost pond structures that can be easily constructed and modified compared to expensive fermentation vessels. These open systems use basic civil engineering structures rather than sophisticated bioreactors, significantly reducing capital expenditure while achieving the same production objectives through alternative means.
2Reliability
If algae are grown in enclosed fermentation vessels to meet high-quality production standards, then product quality and safety are improved, but energy costs increase significantly
Solution Approach 1:
The patent removes algae cultivation from energy-intensive enclosed fermentation systems to passive open pond systems that rely on natural environmental conditions rather than artificial climate control. This extraction eliminates the need for heating, cooling, and sterilization energy inputs while maintaining product quality through biological control methods.
Solution Approach 2:
The open pond system allows algae to grow using natural sunlight, ambient temperature, and atmospheric CO2, eliminating the need for artificial lighting, heating, or cooling systems. The system serves itself by utilizing free environmental resources rather than requiring energy-intensive infrastructure to create and maintain growth conditions.
3Productivity
If the growth rate of algae is increased to reduce per-unit production costs, then productivity improves, but control over growth conditions becomes more difficult
Solution Approach 1:
The patent implements monitoring and selective breeding programs that track algal growth rates and respond to environmental conditions. By continuously observing growth performance and adjusting management practices based on feedback from the system, operators can maintain high productivity while adapting to changing conditions without requiring overly complex control mechanisms.
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 significantly increases algae growth rates and nutritional profile, reducing production costs by spreading capital and operating costs over a larger product volume, thereby lowering the per-unit cost of production.
Implementation Method 1
Algae reproduce at a very high rate with a generation time as short as 10 hours
Implementation Method 2
a method for the aerobic, heterotrophic cultivation of a high density culture of a Chlamydomonas species
Data Source
AI summary
Provided herein are methods for the production of high density cultures of algae as well as nutritional supplements from such cultures and the use of such cultures to produce therapeutic proteins.