1. Introduction
Understanding meat and bone meal production is not an academic exercise for procurement managers — it is the foundation for evaluating whether a supplier’s product will perform to specification. The composition, digestibility, and microbiological safety of MBM are determined almost entirely by decisions made at the production stage: the ratio of bone to soft tissue in the raw material, the rendering temperature and duration, the fat separation method, and the drying process. A procurement manager who understands these variables can ask the right qualification questions. One who does not is evaluating suppliers on price and paper.
Meat and bone meal production sits within a broader rendering sector that also produces poultry meal, feather meal, blood meal, and fish meal — each derived from different raw material streams and processed through different methods, but all subject to the same EU regulatory framework governing Category 3 animal by-products. Understanding how meat and bone meal production differs from the production of these related ingredients clarifies why each occupies a distinct nutritional and commercial position in the European feed market.
This article is written for procurement managers and feed formulators who source rendered animal proteins and want to understand what the production process means for the quality and consistency of what they buy.
2. What Is Meat and Bone Meal Production?
Meat and bone meal production is the rendering process that converts Category 3 mammalian slaughter by-products — bones, soft tissue trimmings, and organ material that do not enter the human food chain — into a dry, shelf-stable protein and mineral ingredient for use in animal feed.
The defining characteristic of meat and bone meal production, relative to other rendered protein manufacturing, is the inclusion of the bone fraction. Bone material contributes calcium phosphate to the finished product, driving the characteristically high ash content (28–35%) and phosphorus concentration (4–6%) of MBM. This bone fraction is what distinguishes meat and bone meal from pure meat meal or other mammalian rendered proteins produced from predominantly soft-tissue inputs — and it is the primary variable that determines how much of the finished product’s crude protein fraction is actually digestible.
Meat and bone meal production operates on porcine, bovine, or mixed mammalian raw materials depending on the rendering facility’s slaughterhouse sourcing relationships. The species composition of the raw material is a regulatory as well as a quality variable: porcine and bovine production streams deliver broadly similar nutritional profiles but carry different regulatory permissions for use in specific feed applications under EU legislation.
3. The Meat and Bone Meal Production Process Step by Step
The meat and bone meal production process follows a defined sequence of unit operations, each of which introduces variables that affect the composition and quality of the finished product.
Step 1: Raw Material Reception and Inspection
The process begins at intake. Raw material arriving at the rendering facility — bones, trimmings, and organ material from connected slaughterhouses or collection routes — is inspected for freshness, contamination, and species identity. The quality of this intake management step has a disproportionate effect on the finished MBM: material received in poor microbiological condition cannot be fully remediated by subsequent processing, regardless of rendering temperature. Facilities with rigorous raw material reception protocols — defined freshness standards, documented inspection records, and species segregation from intake — consistently produce more compositionally stable product than those accepting whatever raw material arrives.
Step 2: Pre-Breaking and Grinding
Before cooking, raw material is reduced to a defined particle size to ensure uniform heat penetration during rendering. Bone fragments that are too large create thermal gradients in the cooking chamber, reducing the consistency of pathogen destruction and protein denaturation. Meat and bone meal production facilities that operate with consistent particle size targets at the grinding stage produce more homogeneous finished product than those where pre-processing is less controlled.
Step 3: Cooking — The Core of MBM Production
The rendering step is the defining operation in meat and bone meal production. Under Regulation (EU) No. 142/2011, Processing Method 1 — the approved standard for Category 3 mammalian by-product rendering — requires heat treatment at a minimum of 133°C, at a minimum pressure of 3 bar, for a minimum duration of 20 minutes. These conditions ensure complete destruction of pathogenic organisms including Salmonella and denature the protein fraction into a more digestible form.
The cooking parameters in meat and bone meal production involve a practical tension: higher temperatures and longer durations provide greater pathogen destruction assurance but progressively damage amino acids, reducing the nutritional value of the protein fraction even where crude protein remains acceptable. Well-managed facilities operate at the regulatory minimum conditions plus a defined safety margin, with cooking parameters documented per batch and auditable by the competent authority.
Step 4: Fat Separation
Following cooking, the rendered mass — a mixture of protein solids, fat (tallow or lard depending on species), and water — is separated. Fat is removed through pressing, decanting, or centrifugation depending on the equipment configuration. The efficiency of fat separation affects both the fat content of the finished meal and its shelf life: residual fat above approximately 12% increases the oxidation risk of the stored product. Tallow and lard recovered during MBM production are separately traded rendered fat ingredients, valued in their own right for use in compound feed, petfood, and oleochemical applications.
Step 5: Drying
The pressed protein cake typically carries 40–60% moisture and must be dried to ≤8% for shelf stability. Two primary drying methods are used across meat and bone meal production facilities. Indirect steam drying — where the product is heated through a steam-jacketed surface without direct contact between the heat source and the product — delivers more consistent and gentle drying, preserving the protein fraction more effectively. Direct flame drying is more energy-efficient but creates uneven heat exposure, increasing the risk of protein damage in the hottest zones of the dryer.
Step 6: Grinding, Sieving and Batch Release
After drying, the MBM is ground to a defined particle size and sieved to remove oversized bone fragments. Before dispatch, each production batch undergoes mandatory proximate analysis — crude protein, moisture, fat, ash — and Salmonella testing in 25g from an ISO 17025-accredited laboratory. Pepsin digestibility and phosphorus are tested periodically by the most rigorous facilities.
4. How Meat and Bone Meal Production Differs from Other Rendered Protein Manufacturing
MBM production operates within a rendering sector that also produces poultry meal, feather meal, blood meal, and fish meal. Each ingredient is produced from different raw material streams through different processes, resulting in distinct nutritional profiles and quality risk profiles.
| Ingredient | Production Process | Key Quality Variable | Typical CP % | Typical Ash % |
|---|---|---|---|---|
| Meat and bone meal | Continuous rendering | Bone:tissue ratio in raw material | 50–55% | 28–35% |
| Poultry meal | Continuous rendering | Raw material cleanliness, ash control | 65–72% | ≤13% |
| Feather meal | Pressure hydrolysis | Hydrolysis temperature and duration | 75–85% | ≤4% |
| Blood meal | Spray or ring drying | Drying method, lysine preservation | 85–92% | ≤6% |
| Fish meal | Cooking, pressing, drying | TVN, raw material freshness | 60–72% | 14–22% |
Poultry meal production follows the same rendering principle as meat and bone meal production but operates on a fundamentally cleaner raw material input. Poultry carcasses, frames, and offal carry far less bone mineral per unit of soft tissue than mammalian by-products, and low-ash poultry meal production facilities actively segregate high-bone fractions from clean offal streams. The result is a finished product with ash typically below 13% and pepsin digestibility consistently above 85% — significantly better performance than meat and bone meal production delivers on both parameters. This is why poultry meal commands a price premium over MBM and serves as the primary animal protein in premium aquafeed and petfood formulations.
Feather meal production involves a completely different process from rendering. Raw poultry feathers are composed almost entirely of keratin — a structural protein that is indigestible in its native form with pepsin digestibility below 30%. The pressure hydrolysis step applied in feather meal production breaks the disulfide bonds holding keratin’s structure together and releases a digestible protein matrix. Unlike meat and bone meal production, where the rendering step directly produces the finished protein fraction, feather meal quality is determined by how precisely the hydrolysis conditions are controlled. Under-hydrolysis leaves keratin intact; over-hydrolysis destroys amino acids. The result is a product category with far wider quality variance than meat and bone meal production delivers.
Blood meal production bears the least resemblance to meat and bone meal production of any rendered animal protein. Fresh blood from approved slaughterhouses is processed through spray drying or ring drying — there is no rendering or heat treatment step comparable to meat and bone meal production. Spray drying delivers lower thermal load and better lysine preservation than ring drying. At 85–92% crude protein, blood meal production output represents the highest protein concentration of any animal-derived feed ingredient, and its exceptional lysine content makes it a valuable complement to poultry meal and feather meal in blended aquafeed protein matrices.
Fish meal production shares the cooking-pressing-drying sequence with meat and bone meal production but operates on marine raw material with fundamentally different freshness dynamics. Total volatile nitrogen (TVN) — which measures degradation products in the protein fraction — is the primary quality indicator in fish meal production, reflecting the freshness of the raw fish at the point of processing. Antioxidant management post-production is also more critical for fish meal than for MBM, given the higher unsaturated fat content of marine raw material. The resulting product delivers a balanced amino acid profile and long-chain omega-3 fatty acids that no terrestrial rendered protein — including MBM — can replicate.
5. Production Variables That Directly Affect MBM Quality
For buyers, the production variables that most directly translate into the quality they receive are the following.
Raw material bone-to-tissue ratio is the single most influential variable in meat and bone meal production. A batch produced from predominantly soft-tissue inputs will deliver lower ash, higher crude protein, and better digestibility than one produced from bone-dominant inputs. This ratio varies with the slaughterhouse sourcing relationships of the rendering facility and with seasonal or commercial fluctuations in available by-product streams. Facilities that actively manage and document their raw material composition deliver more consistent finished product than those that render whatever by-product volume their supply base provides.
Rendering temperature and duration determine both the microbiological safety and the protein quality of finished MBM. Operating precisely at the regulatory minimum maximises protein digestibility but provides the minimum assurance margin against pathogen destruction variability. Most professionally managed meat and bone meal production operations apply a defined margin above the regulatory minimum as standard process control. The batch-level documentation of cooking parameters — temperature log, pressure record, duration — is what allows buyers to verify that regulatory conditions were met for any specific production lot.
Fat separation efficiency affects both the fat content of the finished MBM and its storage behaviour. Residual fat above 12% increases oxidation risk during storage, which can affect palatability and fat-soluble vitamin content in downstream feed formulations.
Drying consistency determines moisture content uniformity across the batch. Uneven drying — common in facilities with older or poorly maintained equipment — creates moisture hot spots in the finished meal that can support mould growth during storage, even where the average batch moisture tests within specification.
6. EU Regulatory Standards for MBM Production
MBM production in Europe operates within a mandatory regulatory framework that defines both the physical production conditions and the approval requirements for producing facilities.
Regulation (EC) No. 1069/2009 requires every facility engaged in meat and bone meal production from Category 3 animal by-products to hold formal establishment approval from the national competent authority. Buyers must verify this approval independently through national competent authority registers — not solely through documentation provided by the supplier.
Regulation (EU) No. 142/2011 mandates Processing Method 1 as the standard heat treatment for meat and bone meal production from Category 3 mammalian by-products. The 133°C / 3 bar / 20-minute conditions are a legal minimum, and compliance must be documented per batch.
Regulation (EC) No. 999/2001 — the TSE regulation — imposes the ruminant feed ban that remains the most operationally significant constraint on MBM production and trade. All mammalian-derived rendered protein is permanently prohibited from use in ruminant feed. BSE-related restrictions also require that bovine raw materials used in meat and bone meal production are sourced from animals that have passed ante- and post-mortem inspection.
Commission Regulation (EU) 2021/1372 introduced dedicated processing line requirements for meat and bone meal production facilities seeking to supply derogation-covered pig and poultry feed applications. Facilities that produce both porcine-derived and bovine-derived MBM must maintain physical segregation between species-origin production streams to qualify under the derogation.
GMP+ B2 Feed Safety Assurance is the primary third-party quality management standard for meat and bone meal production operations supplying the European feed market, requiring independent third-party audit against defined production management and traceability standards.
7. Quality Specifications: What MBM Production Should Deliver
Each quality parameter in the MBM specification has a direct root cause in the production process. Understanding this connection allows procurement managers to interpret COA data as production process signals.
| Parameter | Target Specification | Production Driver |
|---|---|---|
| Crude Protein % (DM) | ≥ 50% | Soft tissue fraction in raw material |
| Ash % | ≤ 35% | Bone fraction in raw material |
| Moisture % | ≤ 8% | Drying process control |
| Crude Fat % | 8–12% | Fat separation efficiency |
| Phosphorus % | 4–6% | Bone fraction |
| Pepsin Digestibility | ≥ 70% | Rendering temperature and duration |
| Salmonella | Absent in 25g | Rendering heat treatment |
| Enterobacteriaceae | ≤ 300 CFU/g | Post-processing hygiene |
A batch of MBM with ash consistently at 33–35% is telling the buyer that the raw material was bone-dominant — and that the digestible protein fraction is materially lower than the crude protein figure suggests. A batch with moisture above specification flags a drying process problem that creates storage risk independent of the other parameters. Reading COA data as production process signals, not just pass/fail criteria, is one of the most practically useful skills in MBM procurement.
8. How MBM Production Facilities Are Approved and Audited
EU approval of meat and bone meal production facilities is a national competent authority function. In the Netherlands, the NVWA approves and monitors rendering facilities. In Germany, the relevant Länder veterinary authority performs the equivalent function. Approval is granted following inspection against the requirements of Regulation (EC) No. 1069/2009 and maintained through periodic competent authority surveillance inspections.
For buyers, independent verification of meat and bone meal production facility approval status — through the relevant national register, not through supplier-provided documentation — is the foundational qualification step. Approval status is listed on publicly accessible databases and should be checked at contract signing and at each contract renewal.
GMP+ B2 certification of meat and bone meal production facilities is audited annually by GMP+ International-accredited certification bodies. The GMP+ International database provides public access to the current certification status of all certified facilities — allowing buyers to verify status directly rather than relying on certificate copies provided by suppliers.
9. Sourcing MBM from Production to Delivery
EU meat and bone meal production capacity is concentrated in Northwest Europe — the Netherlands, Belgium, Germany, France, and Poland — reflecting the density of mammalian livestock slaughter operations in these countries. Netherlands and Belgian rendering facilities are particularly significant for porcine MBM, given the scale of pig slaughter operations in both countries.
For procurement managers sourcing MBM alongside other rendered animal proteins — poultry meal, feather meal, blood meal, and fish meal — a Netherlands-based multi-product trading company with established relationships across multiple EU-approved production facilities provides meaningful supply chain advantages. Consolidated documentation across all ingredient types, flexibility to source from multiple production origins based on availability and specification, and single-point logistics management reduce the operational complexity of multi-ingredient procurement without sacrificing traceability.
Tuva Euro BV, headquartered in Enschede in the Netherlands, sources porcine and bovine MBM from EU-approved rendering facilities and supplies it alongside poultry meal, feather meal, blood meal, and fish meal to European petfood and aquafeed manufacturers. With GMP+ and Halal certification, ISO 17025-accredited batch COAs, species-of-origin declarations per batch, and flexible bulk and big bag delivery formats, Tuva Euro provides the production traceability and compliance documentation that modern B2B feed procurement demands.
10. FAQ
What raw materials are used in meat and bone meal production?
MBM production uses Category 3 mammalian slaughter by-products — bones, soft tissue trimmings, and organ material from pigs, cattle, or both, sourced from approved slaughterhouses. These are by-products that do not enter the human food chain for commercial rather than safety reasons, qualifying as Category 3 animal by-products under Regulation (EC) No. 1069/2009. The ratio of bone to soft tissue in the raw material directly determines the ash content and digestible protein fraction of the finished meal, making raw material sourcing discipline one of the most important quality management variables in MBM production.
How does meat and bone meal production differ from poultry meal production?
Both MBM and poultry meal are produced through rendering — the same fundamental heat treatment, fat separation, and drying sequence. The critical difference is the raw material. Poultry meal production uses poultry carcasses and offal with a lower bone mineral fraction than mammalian by-products, delivering finished product with ash typically below 13% and digestibility above 85%. MBM production uses mammalian by-products including a significant bone fraction, delivering 28–35% ash and digestibility in the 70–80% range. The lower ash and higher digestibility of poultry meal production output make it the preferred primary protein source in premium feed applications, while MBM production output serves as a cost-competitive secondary protein with a meaningful phosphorus contribution.
What processing method is required for EU-approved MBM production?
EU-approved MBM production from Category 3 mammalian by-products must use Processing Method 1 as defined in Regulation (EU) No. 142/2011: heat treatment at a minimum of 133°C, at a minimum pressure of 3 bar, for a minimum duration of 20 minutes applied to particle sizes of ≤50mm. Compliance must be documented per batch and available for competent authority inspection and buyer audit.
How does the bone fraction affect MBM production output quality?
The bone fraction is the defining quality variable in MBM production. A higher bone fraction in the raw material increases ash content — which dilutes the protein fraction and reduces digestible amino acid supply per unit of diet inclusion. At the same time, the bone fraction drives phosphorus concentration, providing formulation value in aquafeed and livestock diets where inorganic phosphorus supplementation costs are significant. Buyers targeting high digestibility performance should specify maximum ash as a contractual parameter; buyers valuing phosphorus contribution may accept higher ash in exchange for the mineral supply it delivers.
11. Conclusion
Meat and bone meal production is a well-established rendering process, but the quality range it delivers — from bone-dominant, low-digestibility commodity material to soft-tissue-rich, specification-consistent product from tightly managed facilities — is wider than for any other Category 3 rendered protein category. The production variables that drive this range — raw material composition, rendering parameters, fat separation, and drying method — are auditable, documentable, and verifiable by buyers who know what to ask for.
Understanding how MBM production compares to the production of poultry meal, feather meal, blood meal, and fish meal clarifies why each ingredient occupies a distinct nutritional position in the rendered protein matrix. Poultry meal production delivers higher digestibility from a cleaner raw material. Feather meal production transforms an otherwise unusable keratin stream through hydrolysis. Blood meal production concentrates the highest protein content from a liquid co-product stream. Fish meal production captures marine protein with unique amino acid and omega-3 characteristics. MBM production converts the largest volume mammalian by-product stream into a dual-function protein and phosphorus ingredient.
For European feed manufacturers, sourcing MBM from production facilities with verified Category 3 approval, documented Processing Method 1 compliance, GMP+ certification, and batch-level species-of-origin declarations — through a qualified Netherlands-based trading partner with access across multiple approved production origins — provides the compliance integrity and supply chain flexibility that responsible feed procurement requires.
Sourcing meat and bone meal or other rendered animal proteins for your European feed operation? Contact Tuva Euro BV.
