Multi-Stage Biocomponent Separation from Grease Trap Waste
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Solution Overview
Problem
Current methods for managing waste streams containing grease, oil, protein, and water from sources like slaughterhouses and grease traps are expensive and inefficient, failing to recover valuable byproducts and posing disposal challenges with high-energy costs and odor issues.
Innovation Solution
A multi-stage continuous process that separates waste materials into predominantly aqueous and non-aqueous streams using a combination of separators, Dissolved Air Floatation devices, and clarifiers, with the addition of polymers and chemicals to enhance separation efficiency, allowing for the recovery of nutrient-rich organic solids, biodiesel feedstock, and clarified water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional disposal methods (composting, anaerobic digestion, rendering, incineration) are used for waste streams containing grease, oil, protein, and water, then the waste can be disposed of, but the process is expensive and fails to recover valuable byproducts
Solution Approach 1:
The waste stream is divided into multiple separation stages using different separation mechanisms (gravity separation, dissolved air floatation, filtration) to isolate different components (grease, oil, protein, water, fiber) rather than treating the mixture as a single waste stream requiring expensive disposal
Solution Approach 2:
Instead of disposing of the entire waste stream, the process recovers valuable components (grease and oil for biodiesel feedstock, protein for animal feed, water for reuse) while discarding only the residual waste, transforming a disposal problem into a resource recovery opportunity
2Ease of operation
If grease trap material is improperly disposed of (dumped into municipal systems or discarded on open land), then disposal is simplified, but environmental harm and odor issues occur
Solution Approach 1:
The process converts the harmful odor-causing components (grease, organic solids) into valuable products (biodiesel feedstock, animal feed) through separation and recovery, eliminating the source of pollution while creating economic value
3Loss of substance
If multi-stage separation processes are implemented to recover valuable materials, then byproduct recovery is maximized, but device complexity and processing time increase
Solution Approach 1:
The complex separation task is broken down into discrete, manageable stages (gravity separation, DAF, filtration) each targeting specific components, making the overall complex process more controllable and maintainable
Solution Approach 2:
The separation system is designed to handle multiple waste stream compositions and recover multiple valuable products simultaneously, making the complex equipment versatile and justifying the investment through diverse output streams
4Object-affected harmful factors
If conventional high-energy disposal methods (incineration, rendering) are used, then waste destruction is achieved, but energy consumption and operational costs increase
Solution Approach 1:
The process replaces high-energy thermal destruction methods (incineration, rendering) with low-energy physical separation methods (gravity separation, dissolved air floatation, filtration) that achieve waste management through mechanical and physical means rather than thermal energy input
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 process effectively recovers valuable materials, reducing disposal costs and odor issues, while enabling the production of animal feed and biodiesel feedstock, and treating water to acceptable levels for discharge.
Implementation Method 1
separating a fourth stream and a fifth stream from the third stream, the fourth stream containing predominantly non-aqueous solids
Implementation Method 2
separating from the fifth stream a sixth stream containing predominantly non-aqueous liquids and a seventh effluent stream comprising predominantly water
Data Source
AI summary
A multi stage process for the separation of bio-components from grease trap waste and animal waste materials is disclosed. Targeted polymers are added to the source and separated streams prior to passing the streams through separation equipment including a rotary screen, one or more presses, a dissolved air floatation device and a clarifier in which the waste stream is separated into a stream containing predominantly oil, grease and protein, a stream containing predominantly water and a stream that predominantly contains fibers.