Pre-rendering Limed Cattle Hide Fleshings for Pet Food
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Solution Overview
Problem
The existing rendering process requires raw materials to be pre-processed into a state suitable for conversion into edible meat, but this step is inefficient, particularly in removing lime from limed cattle hide fleshings to produce high-quality pet food or animal feed.
Innovation Solution
A pre-rendering system and method involving grinding limed cattle hide fleshings, followed by de-liming using acids like ammonium sulfate or boric acid to adjust pH, and neutralizing with acids like sulfuric acid to produce edible meat, which is then washed and dried to remove impurities and residual water, reducing energy consumption and enhancing product quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional rendering process is used without pre-processing, then the process is simpler, but the energy consumption is high and product quality is poor
Solution Approach 1:
The patent applies preliminary action by performing grinding, de-liming, and neutralization steps before the main rendering process. The fleshings are ground to increase surface area, then de-limed using acid solutions to remove lime, and neutralized to adjust pH. These pre-processing steps prepare the material in advance, reducing the energy required during rendering and improving final product quality while managing the increased process complexity through systematic preparation.
2Manufacturing precision
If limed cattle hide fleshings are processed directly without de-liming, then the process is shorter, but the product quality is poor and unsuitable for edible meat conversion
Solution Approach 1:
De-liming is performed as a preliminary action before rendering to remove lime from the fleshings using acid solutions (such as phosphoric acid, sulfuric acid, or food-grade acids). This critical pre-processing step adjusts the pH and removes harmful lime residues, ensuring the final product meets quality standards for edible meat conversion to pet food or animal feed, thereby preventing quality issues that would require reprocessing.
Solution Approach 2:
The patent applies parameter changes by systematically adjusting the pH of the fleshings through de-liming and neutralization steps. Acid solutions are used to reduce lime content and lower pH, followed by neutralization to achieve the optimal pH range for edible meat conversion. These controlled parameter changes ensure product quality and suitability for rendering while managing processing time through efficient chemical treatments.
3Productivity
If grinding is not performed before de-liming, then the process is simpler, but the surface area is reduced and rendering efficiency is lower
Solution Approach 1:
The patent applies segmentation by grinding the limed cattle hide fleshings into smaller particles before de-liming. This mechanical segmentation increases the total surface area of the material, allowing more effective contact with acid solutions during de-liming and subsequent rendering processes. The ground material is then processed through de-liming and neutralization, with the increased surface area enhancing rendering efficiency and productivity while managing process complexity through systematic preparation.
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 converts limed cattle hide fleshings into edible meat for pet food or animal feed, improving energy efficiency and product quality by creating additional surface area through grinding and utilizing acid treatments to adjust pH levels, resulting in a more efficient rendering process.
Implementation Method 1
de-liming the ground limed cattle hide fleshings using one or more acids to adjust the pH to approximately 8-9
Implementation Method 2
neutralizing the ground de-limed cattle hide fleshings to adjust the pH to 7
Data Source
AI summary
A pre-rendering system and method includes grinding limed cattle hide fleshings. The ground, limed cattle hide fleshings may then be de-limed using one or more acids or acidic solutions and then may be neutralized using one or more acids. Once the cattle hide fleshings have been de-limed and neutralized, they may be washed and then dried to prepare edible meat, such as for pet food or other animal feed, that may be rendered.