Corn Nixtamalization System with Pericarp Extraction
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Solution Overview
Problem
Traditional nixtamalization processes for producing corn-based products are inefficient, generating large effluent waste, requiring long soaking times, high energy costs, and expensive equipment, while also being environmentally unacceptable and challenging to optimize for consistent masa production.
Innovation Solution
A system that uses raw whole corn kernels, automates the removal of the pericarp and other fractions, and controls the mixing of corn, lime, and water to achieve nixtamalization without external heat, enabling fast production of masa with desired particle distribution and gelatinization, and reduces effluent discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional nixtamalization processes are used to produce corn-based products, then the pericarp is removed and masa is formed, but large effluent waste is generated and long soaking times are required
Solution Approach 1:
The system performs preliminary mechanical pre-milling to remove the pericarp before nixtamalization, eliminating the need for long soaking times traditionally required for natural pericarp removal. This preliminary action accelerates the overall process while reducing time loss.
Solution Approach 2:
The system extracts and removes the pericarp fraction mechanically before the nixtamalization step, separating it from the endosperm and germ. This extraction eliminates the need for prolonged soaking to remove the pericarp, thereby reducing soaking time and increasing productivity.
2Ease of manufacture
If traditional nixtamalization processes are used, then corn is cooked in alkaline water, but large amounts of effluent are discharged into the sewer system
Solution Approach 1:
The system discards the pericarp fraction mechanically before nixtamalization, preventing it from entering the alkaline cooking process. This eliminates the source of effluent contamination, allowing the alkaline water to be reused or discharged with minimal environmental harm while maintaining process simplicity.
Solution Approach 2:
The pericarp is extracted and removed before the alkaline cooking step, so it does not contribute to effluent generation. This extraction enables the nixtamalization process to proceed with minimal harmful discharge, as the pericarp is the primary source of effluent contamination.
3Reliability
If traditional nixtamalization processes are used, then corn is soaked for 12-16 hours, but this generates high liquid-waste discharges
Solution Approach 1:
The system performs preliminary mechanical processing to remove the pericarp and prepare the corn for rapid nixtamalization. This preliminary action eliminates the need for 12-16 hour soaking, reducing liquid waste generation while maintaining reliable and consistent masa production through controlled processing parameters.
Solution Approach 2:
The system changes the processing parameters by replacing long-duration soaking with controlled alkaline treatment of pre-processed corn. This parameter change reduces the treatment time from 12-16 hours to a much shorter duration, significantly reducing liquid waste while ensuring consistent masa quality through precise control of alkaline concentration and treatment time.
4Productivity
If traditional nixtamalization equipment is used, then corn can be processed, but expensive equipment and large room space are required
Solution Approach 1:
The system merges the pre-milling, pericarp removal, and nixtamalization steps into an integrated continuous processing system. This consolidation improves production efficiency by eliminating transfer times and intermediate handling, while reducing overall equipment cost compared to multiple separate traditional units.
Solution Approach 2:
The system employs multi-functional equipment that performs multiple operations (pre-milling, pericarp removal, nixtamalization) within single units. This multi-functionality reduces the total number of equipment pieces required, lowering both equipment cost and space requirements while maintaining high production efficiency.
5Manufacturing precision
If traditional nixtamalization processes are used, then corn is ground after soaking, but the process requires various pieces of equipment for cooking and soaking stages
Solution Approach 1:
The system combines the cooking and soaking stages into a single integrated nixtamalization unit that performs both functions simultaneously. This merging maintains precise control over temperature, time, and alkaline concentration to ensure consistent masa quality, while reducing the number of separate equipment pieces required.
Solution Approach 2:
The system employs universal equipment that performs multiple functions (cooking, soaking, and initial grinding) within single units. This multi-functionality reduces equipment complexity while maintaining manufacturing precision through integrated control systems that monitor and adjust parameters to ensure consistent masa quality.
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
Enables rapid, efficient, and environmentally friendly production of consistent corn-based products with improved taste profiles, reducing energy costs and equipment needs, and eliminating effluent discharge, while being adaptable to varying corn kernel qualities.
Implementation Method 1
The lime water is pumped through a column of raw corn kernels, allowing the lime water to penetrate and swell the kernels, thus effecting a rapid nixtamalization
Implementation Method 2
Simultaneous processes of water and calcium diffusion occur during the nixtamalization process, affecting the final product's physicochemical characteristics
Data Source
AI summary
A system for converting whole kernel corn into mesa within a brief period of time. A system including apparatus for removing the pericarp and stem from the kernels and residuals being ground into a flour of suitable particle sizes. This flour is combined with lime and water and mixed for 6-12 minutes reaching a terminal temperature of about 50 degrees Celsius or and wherein gelatization occurs, forming a masa. Further apparatus then fragments the masa into sizes for further processing.