Density-Based Corn Separation for Aflatoxin Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for separating aflatoxin-contaminated corn kernels from uncontaminated ones are inefficient, often resulting in undesirable side effects or incomplete removal, leading to high aflatoxin levels in final products due to sampling variations and limited success in detoxification processes.
Innovation Solution
A floating process using a liquid with a specific gravity of 0.99-1.2 to separate aflatoxin-contaminated corn kernels from uncontaminated ones, where the contaminated kernels float and are removed by vacuum or liquid overflow, significantly reducing aflatoxin levels in the remaining batch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional separation methods are used, then some contamination removal is achieved, but the methods are inefficient and produce undesirable side effects
Solution Approach 1:
The patent changes the physical parameter of density by using a liquid with specific gravity between 0.99-1.2 to create a density-based separation system. Contaminated corn kernels with lower density float while uncontaminated kernels sink, enabling efficient separation without conventional mechanical methods
Solution Approach 2:
The patent introduces a liquid medium (water or brine solution) as an intermediary substance that facilitates separation between contaminated and uncontaminated corn kernels. The liquid acts as a mediator that exploits density differences to achieve clean separation
2Measurement precision
If sampling is performed to detect aflatoxin levels, then contamination detection is achieved, but sampling variations cause false positives and false negatives
Solution Approach 1:
The patent extracts and removes contaminated corn kernels from the batch through floating separation, physically eliminating the contamination source rather than relying on sampling detection. This ensures complete removal of high-aflatoxin kernels regardless of sampling variations
3Reliability
If detoxification processes are applied, then aflatoxin reduction is attempted, but the processes have limited success and cause flavor degradation
Solution Approach 1:
The patent converts the harmful effect of aflatoxin contamination into a beneficial separation mechanism by exploiting the density difference between contaminated and uncontaminated kernels. The contamination itself creates the physical property difference needed for clean separation, eliminating the need for chemical detoxification
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 achieves a reduction of up to 90% of aflatoxin levels in the corn batch while removing no more than 15% of the initial corn, resulting in a product with aflatoxin levels as low as 1 ppb, making the corn suitable for food or feed applications.
Implementation Method 1
allowing the aflatoxin-contaminated corn to float on the liquid and the uncontaminated corn to sink in the liquid forming a corn bed
Data Source
AI summary
Methods and apparatus for separating and removing aflatoxin-contaminated corn from batches of corn by a floating process, thus producing a distinguishable floating mat of contaminated corn and a separate submerged bed of uncontaminated and less contaminated corn. The methods of this disclosure include removing the floating contaminated corn mat by a vacuum mechanism or by liquid flow. The methods reduce the aflatoxin level in the submerged corn bed as much as 80% from the initial aflatoxin level, while removing no more than 15% from the batch of corn.