How PuraTherm Works

STEP-BY-STEP OPERATION

The 5-Phase Clinical Cycle

From bottle loading to chilled discharge, every second is controlled by high-speed PLC microprocessors.

PHASE 1

Preparation & Basket Loading

Raw donor breast milk or mother's own milk is aliquoted into hospital-standard glass or polycarbonate bottles (50ml to 250ml capacity). Bottles are sealed tightly and placed into the electropolished 316 stainless steel basket.

A calibrated control reference probe is inserted into a dummy bottle containing an identical volume of water or reference milk. The basket is gently lowered into the pasteurisation chamber, and the lid is secured.

PHASE 2

Water Fill & Controlled Ramp Heating

The operator selects the validated Holder cycle on the touchscreen. The system fills with clean treated water to the preset level, fully submerging bottle bodies up to their neck line.

Immersion heating elements engage simultaneously with hydrodynamic circulation pumps. Water temperature ramps smoothly towards 62.5 °C without localized overheating, protecting delicate milk proteins during the warmup phase.

PHASE 3: THE HOLDER PLATEAU

Precision Pasteurisation (62.5 °C for 30 Minutes)

The 30-minute timer initiates only when the internal liquid core of the reference bottle achieves exactly 62.5 °C (± 0.5 °C). This ensures that biological thermal death time (TDT) is fully satisfied for all pathogens.

If at any millisecond the temperature drops below 62.0 °C or exceeds 63.0 °C, the PLC triggers an automatic alert and logs the deviation, ensuring zero unvalidated batches reach vulnerable infants.

PHASE 4: ACTIVE COOLING

Accelerated Chilling Cycle (Below 4 °C)

Immediately upon completion of the 30-minute holding timer, hot water is swiftly evacuated and replaced with chilled recirculating water. Rapid temperature drop is critical to stop thermal degradation of bioactive enzymes.

Milk is brought down from 62.5 °C to below 4 °C within 20 to 30 minutes, meeting British NICE CG93 and European Milk Bank Association guidelines for immediate cold-chain preservation.

PHASE 5

Cycle Completion & Electronic Audit Logging

An audible chime and green screen notification signal cycle completion. The water is evacuated via the automated drain valve. Operators remove the dry, chilled basket directly for cold storage at 4 °C or immediate deep freezing at -20 °C.

The system automatically compiles a digital cycle certificate containing: Date, Time, Operator ID, Batch Number, Min/Max/Average plateau temperatures, and duration curve. Data is stored locally and available for USB export.

HYGIENE & MAINTENANCE

Sanitation & Clean-In-Place Protocols

Maintaining pristine hygiene between donor batches is effortless. PuraTherm incorporates dedicated sanitation routines designed to prevent biofilm accumulation and mineral deposit formation:

Automated Drain: Complete evacuation of processing water prevents stagnant pooling
Descaling Routine: Programmable descaling cycle using food-grade citric solutions
Surface Sanitisation: Electropolished 316 stainless steel interior withstands medical disinfectant wipes (chlorine-based or quaternary ammonium compounds)
Filter Maintenance: Removable mesh intake filters protect internal circulation pumps from debris

PuraTherm Maintenance and Cleaning Interface