Algae Cultivation Timing for Biomass Yield
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Solution Overview
Problem
Algae cultivation productivity is hindered by suboptimal growth environments, particularly in large-scale systems, due to challenges in maximizing cell growth rates, which affects the economic viability of biofuel production from algae.
Innovation Solution
A method involving the strategic timing of dilution and nutrient addition in algae cultures, where dilution occurs between sunset and sunrise, and nutrients are added in subsets throughout the day to align with reduced light periods, optimizing growth conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If nutrients are added all at once during daylight hours, then the operation is simple and cost-effective, but algae productivity is suboptimal due to stress on cells during dilution and nutrient uptake
Solution Approach 1:
The patent segments nutrient addition into multiple subsets delivered at different times (morning, midday, evening) rather than adding all nutrients at once. This segmentation allows the algae culture to receive nutrients during periods of lower light intensity, reducing stress and improving productivity while maintaining operational manageability through scheduled deliveries.
Solution Approach 2:
The patent implements periodic action by establishing a daily cycle of nutrient addition at specific times (morning, midday, evening) rather than continuous or single-time addition. This periodic delivery pattern synchronizes with the algae's circadian rhythms and light cycles, optimizing growth conditions and reducing cellular stress during dilution and nutrient uptake.
2Productivity
If dilution and nutrient delivery occur simultaneously in the middle of the day, then operational efficiency is maximized, but cell growth is inhibited due to suboptimal growth environment
Solution Approach 1:
The patent applies preliminary action by performing dilution and nutrient addition before peak light intensity occurs (in the morning and midday periods). This timing allows the algae to acclimate to the changed conditions before experiencing maximum light stress, thereby optimizing cell growth rates and reducing the time lost to suboptimal growth conditions.
Solution Approach 2:
The patent changes the temporal parameters of dilution and nutrient delivery from midday to multiple time points throughout the day (morning, midday, evening). This parameter change optimizes the growth environment by avoiding peak light stress during dilution and nutrient uptake, thereby increasing cell growth rates and productivity.
3Productivity
If single-time nutrient addition is used, then the process is simple to operate, but algae productivity is limited compared to multiple-time addition
Solution Approach 1:
The patent segments nutrient delivery into multiple scheduled portions (morning, midday, evening) rather than using a single-time addition approach. This segmentation increases biomass production by delivering nutrients at optimal times while maintaining ease of operation through automated or scheduled delivery systems that manage the complexity of multiple time points.
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 algae productivity by reducing stress on cells during dilution and nutrient uptake, leading to increased biomass production and improved economic feasibility of large-scale algae cultivation for biofuel production.
Implementation Method 1
Photosynthetic algae production offers the potential for an order of magnitude higher agricultural productivity than other plants
Data Source
AI summary
The present disclosure describes cultivation methods for increasing productivity of algae strains. The methods include diluting the algae cultures at specific times, as well as nutrient feeding the cultures at specific times.