Algae Biofuel Production via Thermal Cell Disintegration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for concentrating algae beyond 11% concentration are inefficient and energy-intensive, and fail to effectively remove water from algae cells, leading to production inefficiencies in hydrocarbon fuel production.
Innovation Solution
A continuous process involving pre-processing of algae through heat exchanger treatment to disintegrate cell walls, followed by decantation to achieve 30-50% concentration, and further processing with additives and high pressure/temperature conversion to produce fuel, allowing efficient water removal and energy recovery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If mechanical concentration methods (pressure filtration, centrifugation, flotation) are used, then algae concentration can be achieved up to about 11%, but beyond this level water removal becomes extremely difficult and energy-intensive evaporation is required
Solution Approach 1:
The patent applies parameter changes by heating the algae slurry to temperatures between 80-120°C and maintaining it at this temperature for a specific residence time. This thermal treatment fundamentally changes the physical state of water within algae cells, transforming it from a bound state (difficult to remove mechanically) to a free state (easy to separate). The heat treatment modifies the cellular structure and water binding characteristics, enabling efficient water removal through simple gravity separation or filtration without requiring energy-intensive evaporation processes.
Solution Approach 2:
The patent implements preliminary action by performing thermal treatment on the algae slurry before attempting water removal. The heating and holding process is conducted as a pre-step to break down cell structures and release bound water, preparing the material for subsequent easy separation. This preliminary thermal conditioning prevents the need for energy-intensive evaporation by addressing the water binding issue before concentration attempts are made.
2Quantity of substance
If evaporation is used to remove water from algae, then water removal is achieved, but the resultant sludge becomes too stiff to pump and further concentration is not achievable
Solution Approach 1:
The patent applies parameter changes by using moderate heating (80-120°C) rather than complete evaporation. This controlled thermal treatment releases bound water while maintaining the slurry in a pumpable state. The temperature and residence time are carefully controlled to achieve optimal water release without over-concentrating the sludge to unmanageable viscosities. This parameter optimization allows continuous pumping and further processing.
Solution Approach 2:
The patent implements continuity of useful action by designing a continuous flow system where algae slurry is constantly heated, treated, and separated. The thermal treatment and water removal occur in a continuous process rather than batch evaporation, maintaining the slurry in a fluid, pumpable state throughout the process. This continuous operation prevents the sludge from becoming too stiff while achieving efficient water removal.
3Quantity of substance
If radio waves or ultrasonics are used for algae concentration, then concentration is achieved, but the process is inefficient and energy intensive with no energy recovery
Solution Approach 1:
The patent applies parameter changes by using conventional thermal heating (80-120°C) instead of advanced electromagnetic methods like radio waves or ultrasonics. This approach uses well-understood thermal parameters that can be efficiently controlled and managed. The thermal process is highly energy-efficient because it directly heats the water molecules for release without the energy losses associated with electromagnetic conversion and absorption. The simple heating mechanism avoids the energy-intensive nature of radio wave or ultrasonic treatments.
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 process enhances algae concentration, facilitates efficient water removal, and improves the production rate and efficiency of hydrocarbon fuel production, overcoming previous inefficiencies and energy challenges.
Implementation Method 1
pre-heating the organic feedstock by passing the feedstock through a heat exchanger
Implementation Method 2
heating the organic feedstock to a desired temperature for a period of time so as to effectively disintegrate the cells walls of the algae
Implementation Method 3
cooling the heated organic feedstock by passing the feedstock backwards through the heat exchanger
Implementation Method 4
removing excess water from the organic feedstock in a decanter to produce a concentrated pumpable organic feedstock
Data Source
Figure 1
Figure 2
Figure 3
AI summary
According to one embodiment, a process for treating an organic feedstock is disclosed. The organic feedstock including a convertible component is preprocessed to increase the concentration of the convertible component. The organic feedstock is processed to convert at least a portion of the convertible component to a fuel and the fuel is extracted from the organic feedstock.