Scenario summary
K-12 district central kitchen feeds 5,000–15,000 students. Daily utensil load: 8–15 mixer bowls (Hobart 60-quart and 80-quart), 80+ serving spoons, ladles, scoops, prep knives, 200+ delivery trays returned from school sites.
The cleaning challenge
Allergen control is the critical-path requirement. K-12 districts must demonstrate allergen reset between peanut-containing and peanut-free production runs. USDA FNS audits require documented sanitation. Local-staff training must complete in under 30 minutes.
Recommended PTW-1900 setup
Chamber: Standard 750 × 1000 × 1900 mm. Mixer bowls invert on bottom tier, utensils hang on peg inserts, delivery trays load on upper levels.
Heating: Electric 70 kW.
PLC profiles:
- Standard 6-min — daily mixed-utensil cleaning
- Allergen Reset 8-min — between allergen-class production runs (peanut → peanut-free, dairy → dairy-free)
- Sanitization Only 8-min — end-of-day sanitation reset
Touch-screen language: bilingual English / Spanish (standard for U.S. districts) or English / French / Chinese / Arabic as needed.
Throughput: 1 trolley per 6-min cycle, batch all utensils + trays in one daily wash window.
Expected ROI
- Labour savings: 2 wash workers → 1 → ~$50,000 annual
- Net annual savings: ~$48,000
- Machine cost: ~$52,000
- Payback: ~13 months
School cafeteria FAQ
Q: Will the 80-quart Hobart bowl fit? A: Yes, inverted on the bottom tier. Confirm dimensions during engineering review.
Q: How do we train cafeteria staff (high turnover)? A: PLC touch-screen interface trains in 20 minutes. Three icons: Standard, Allergen Reset, Sanitization. Press one, press Start.
Q: USDA audit documentation? A: PLC CSV log + chemical dose log + operator audit log integrate into your district’s HACCP plan and become the sanitation evidence.