Beyond Soybean Oil: A Quality Assurance Approach to Full-Bean Processing
Most soya crushers prioritise oil extraction. In those operations, the remaining soybean meal is often treated as a secondary product – something to be managed rather than optimised. Pretoria Protein Company operates differently. Here, the nutritional integrity of the soybean meal is the core focus. Oil is still produced to a high standard, but the primary objective is to extract full value from the entire bean, with soybean meal forming the foundation of a consistent, protein-rich feed product for monogastric animals.
Quality control, testing and sorting after the fact have their place in many industries. Pretoria Protein Company, however, follows a quality assurance model, managing the entire process to ensure that the end product consistently meets target specifications.
Why Soybean Meal Comes First
One metric tonne of soybeans contains only 170-200 kg of oil. The remaining 700-800 kg becomes soybean meal, a nutrient-rich meal that plays a vital role in feed conversion and protein supply for monogastric species. In this context, prioritising oil alone would mean devaluing most of the bean’s worth. That’s why this operation was designed to optimise the whole bean from the outset.
Incoming soybeans are tested and graded upon arrival. Moisture, protein, oil content, and other critical parameters are measured to ensure proper classification and storage. This allows for strategic blending of batches, helping to minimise variation in the raw material and maintain consistent quality in the final product.
Given the natural variations in crop quality caused by cultivar, climate, and region, this early-stage grading is vital for maintaining control later on.
The laboratory is embedded in every part of the workflow. Samples are taken hourly during production and tested for protein, fibre, fat, moisture, urease activity, and KOH solubility. Physical checks, such as for bean size and flake thickness, are also routinely conducted. This data enables timely process adjustments and helps prevent product deviation, rework, or loss.
Heat application is carefully controlled to avoid damage to the protein, particularly during the stage that neutralises urease activity. The result is a well-balanced soybean meal with preserved nutritional value, suitable for use in high-performance feed.
Each batch is tested again before dispatch. A Certificate of Conformance (COC) is issued only once all results meet the agreed criteria. This provides full traceability, giving customers documented confidence in the consistency and quality of every delivery.
Physical Properties: Minor adjustments with significant effect
Two physical characteristics are especially important: flake thickness and cracked bean size. These traits influence both the efficiency of oil extraction and the quality of the meal. If flakes are too thick, oil may be trapped inside and yield decreases; if too thin, they may become over-processed or structurally fragile. Likewise, managing bean size after cracking allows for effective hull separation and prepares the material for consistent conditioning and flaking.
Uniform particle size is particularly important in downstream applications such as feed formulation, where it ensures even mixing, consistent nutrient profiles, and reliable product performance. These factors directly influence production efficiency and customer satisfaction.
While the plant is designed around meal optimisation, oil is treated as a valuable product in its own right. Standard analyses include moisture and sediment, colour values (red and yellow), phosphatides, and rancidity testing. These tests ensure the oil meets strict standards for appearance, shelf life, and safety, making it suitable for downstream markets.
Focusing on soybean meal rather than oil, and applying quality assurance throughout, enables Pretoria Protein Company to deliver reliable, high-specification products that utilise the entire soybean. By managing every stage of production with precision and consistency, the business meets both market expectations and nutritional requirements without compromising on either.
In short, Pretoria Protein Company proves that when you treat the bean as a whole, you deliver more than a product; you create lasting value.