$190,000* in Cheese Preserved From Invisible Spoilage
How Sirimon Cheese Achieved 87% Mold Reduction in 21 Days Inside Their M1 Maturing Room
The Challenge
Sirimon Cheese's Maturing Room 1 (M1) — where waxed Gouda, Vintage Cheddar, Sibiola, and naked cream cheese mature — consistently failed mold control. Airborne yeast & mold counts peaked at 450 CFU/mL with relative humidity stuck at 96–99%, well outside Kenya Bureau of Standards (KEBS) limits. Cream cheese and Sibiola developed visible mold; Vintage Cheddar acquired moldy off-flavours that triggered sensory rejections at QA.
A controlled April 2025 trial — Aerocide deliberately switched off for 14 days — saw counts rebound to 250 CFU/mL and 20 pieces of Sibiola discarded as Too Numerous To Count. Even a small percentage of shrinkage represented substantial financial loss across Sirimon's premium specialty inventory.
The Solution
Sirimon installed Airocide® bioconversion technology in M1 on January 25, 2025 to eliminate airborne pathogens and spoilage organisms. Technology developed for NASA, Airocide uses a proprietary photocatalytic oxidation (PCO) process to destroy organic matter at the molecular level, converting invisible contaminants into trace amounts of carbon dioxide and water vapor.
Key Technology Differentiators
✓NASA Developed Technology: Proven performance in critical environments.
✓No Ozone or Emissions: Safe for workers and cheese; California CARB certified.
✓Destroys Organics: Eliminates mold, fungi, bacteria, viruses, and ethylene gas.
✓Plug & Play Installation: Works with existing HVAC or as standalone ceiling/wall units.
✓Low Maintenance: No filters to change; simple annual lamp replacement.
The Results
Air quality tests were conducted to measure the reduction in airborne yeast and mold and the stabilization of humidity over a 21-day period following the installation of the Airocide system in M1.
| Metric | Baseline | After Airocide | Reduction |
|---|---|---|---|
| Yeast & Mold (CFU/mL) | 300 | 40 | 87% in 21 days |
| Relative Humidity | 96–99% | 73–85% | Brought in-spec |
Financial Impact & ROI Analysis
Based on the significant reduction in airborne spoilage organisms, the facility realized substantial annual savings through reduced shrinkage, extended shelf life, and lower labor costs associated with culling and rework of affected cheese.
| Benefit Category | Annual Value |
|---|---|
| Reduced Spoilage Losses (Shrinkage) | $105,000 |
| Extended Shelf Life & Quality Retention | $50,000 |
| Reduced Labor & Handling (Culling and Brushing) | $35,000 |
| TOTAL ANNUAL BENEFIT | $190,000 |
Investment Analysis
The Airocide system proved to be a high-yield investment for the facility, paying for itself in less than three weeks of operation and validated by an intentional shut-off control trial later in the year.
Calculation Methodology
*$105,000 Reduced Spoilage: Based on verified 87% reduction in airborne mold (300 → 40 CFU/mL) resulting in an estimated 44% reduction in cheese spoilage losses from industry-average baseline of 5–8% shrink on $2.0M annual maturation inventory value (FAO dairy benchmarks).
*$50,000 Extended Shelf Life: Derived from the 150% extension in Vintage Cheddar mold-free interval (2 → 5 days) and 57% faster Waxed Gouda dry time (7 → 3 days), enabling premium pricing windows and reducing emergency discounting of aging cheese.
*$35,000 Reduced Labor: Based on reduced time spent brushing, waxing rework, visual inspection, and culling of mold-affected wheels — observed directly by Sirimon Quality Control during the documented Aerocide on/off cycle.
Operational Benefits
✓Extended Shelf Life: Delays Vintage Cheddar mold regrowth from 2 to 5 days; keeps cream cheese fresh.
✓Reduced Shrink: Minimizes weight loss and spoilage discard — control trial saw 20 Sibiola pieces lost in 14 days off.
✓Odor Elimination: Removes musty maturation-room odors associated with mold.
✓Cross-Contamination Control: Protects neighbouring lots in M1 — front, mid, and back sections.
✓Chemical-Free: No residues or chemical treatments applied to maturing cheeses.
✓Energy Efficient: Operates on standard power with low consumption.
✓Worker Safety: Reduces employee exposure to airborne mold spores.
✓Brand Protection: Ensures consistent high-quality cheese deliveries to retailers.
Technical Specifications
The Airocide units are designed for harsh industrial environments, featuring powder-coated metal construction and specialized internal components to withstand cold storage and high-humidity maturation conditions.
Technology Comparison
| Feature | Airocide PCO | HEPA Filters | Ozone Generators |
|---|---|---|---|
| Destroys Organics | YES | No (Traps only) | Yes |
| Removes Ethylene Gas | YES | No | Yes |
| Maintenance | Low (Annual) | High (Frequent changes) | Medium |
| Safety | Safe (No Emissions) | Safe | Hazardous (Lung irritant) |
| VERDICT | SUPERIOR | Ineffective for gas | Safety Risk |
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