company news about How to solve the problem of poor quality of finished products from fish feed pellet processing?

Tracing and investigating abnormal nutritional indicators requires a reverse process, proceeding "from finished product to raw materials." When tests reveal that the protein, vitamins, or other indicators in the finished product do not meet standards, first check the production formula's ingredient input records. If the input data is incorrect, operators need to be retrained to standardize the input process. If the input is correct, test the nutritional components of the raw materials used. For example, if the corn protein content is lower than the standard (normal ≥8.5%), it indicates a raw material quality issue, and the supplier should be contacted for a return or replacement. If both the raw materials and the input are correct, check the mixer's operating parameters. Insufficient mixing time (<5 minutes) will lead to uneven nutrition; the mixing time needs to be extended to 8-10 minutes to ensure the coefficient of variation is ≤5%.

Investigating abnormal hygiene indicators (excessive microorganisms, excessive heavy metals) requires focusing on the "raw materials-equipment-environment" process. Common causes of excessive microbial levels in finished products include: 1) Moldy raw materials, requiring testing for total mold count; if exceeding the limit, the product must be used. 2) Incomplete equipment sterilization; extruders and pelletizers may not have reached sterilization temperatures (<120℃), requiring increased equipment temperature and extended holding time. 3) A dirty and unsanitary production environment, requiring improved workshop ventilation and daily disinfection of equipment surfaces and floors. For heavy metal contamination, the focus is on raw material and equipment wear. Testing the heavy metal content in raw materials and inspecting the screws and dies of pelletizers and crushers are crucial; if severe wear produces metal fragments, wear-resistant parts must be replaced.

Establishing a "one item, one code" traceability system is key to rapid troubleshooting. Each batch of finished products is assigned a unique traceability code, recording information such as raw material batch, production equipment, parameter settings, and test data. Scanning the traceability code when quality is abnormal allows for locating the problem within 10 minutes. Simultaneously, samples of each batch of finished products are retained (until the expiration date) for subsequent re-inspection and cause analysis. A pet food factory successfully identified the cause of insufficient vitamins in a batch of dog food through its traceability system: an error in the addition of additives. The factory promptly recalled unsold products, reducing losses by 500,000 yuan.

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