Engineer Food Processing Safety case studies
Engineer Food Processing Safety · Put your knowledge to work in context.
The Engineer Food Processing Safety credential is aimed at engineers, quality managers and technical leads who own food safety outcomes inside processing plants rather than only auditing them. It tests whether you can reason about a process line end to end: where hazards enter, which control actually removes or reduces them, and how you prove the control worked. The Engineer Food Processing Safety case studies are 5 cases and about 4,184 words.
1Retort Temperature Excursion on a Low-Acid Canned Soup Run
A still retort at a vegetable-soup cannery runs 12-ounce (307×409) cans of a low-acid product (pH 6.3, aw 0.985) under a scheduled process of 121.1 °C for 32 minutes after a 6-minute come-up, established by heat-penetration studies with Fo ≥ 8 minutes at the cold spot. On the 14:00 run, a boiler feedwater fault tripped the burner; the retort chart shows temperature falling to 115.6 °C for 5.5 minutes before steam was restored and the operator resumed the count, completing 32 minutes at 121.1 °C.
875 words, about 4 min2Allergen Changeover Failure on a 'Dairy-Free' Chocolate Line
A chocolate plant runs milk chocolate and a 'dairy-free' 70% dark chocolate on the same moulding line, enrober and cooling tunnel. The changeover procedure is dry cleaning only: scrapers, compressed air and a wipe-down with 70% ethanol; no water is used because the line is not wet-cleanable.
948 words, about 5 min3Persistent Listeria Finding in a Ready-to-Eat Salad Plant
A ready-to-eat deli-salad plant with no kill step after assembly runs a Listeria environmental monitoring program: 30 Zone 1 (food-contact) swabs and 45 Zone 2/3 swabs per month. Over 8 weeks, Listeria monocytogenes was recovered from four Zone 2 samples: a floor drain near the salad spinner (weeks 1, 4 and 8), a squeegee handle (week 4), and a wall–floor junction under the conveyor (week 8).
672 words, about 3 min4New Filler with a Dead Leg and Failed Cleaning Verification
A sauce plant installed a new piston filler on a line producing a low-acid tomato-based sauce (pH 4.9, aw 0.97). The filler's product valve bodies are 316L stainless, but the port for the pressure gauge is a 25 mm dead leg with a threaded connection; the welds on the inlet elbow are ground but not polished, and dye-penetrant inspection reveals a 2 mm crevice at a ferrule.
708 words, about 4 min5Metal Detector Bypass and a Wire Fragment Complaint
A bakery produces 250 g packs of a soft, high-moisture bread on a line with an in-line metal detector (aperture 300 × 150 mm) located after the slicer and bagger, before case packing. The detector's documented test pieces are 2.0 mm Fe, 2.5 mm non-ferrous and 3.0 mm stainless steel, and it is challenged at start-up, every 4 hours and at the end of the run.
981 words, about 5 min