Hospital waste treatment and sterilization technologies

As well as meeting the public demand for ecological solutions, hospital waste management through Newster’s Frictional Heat Treatment offers many other advantages, such as:

• improved levels of hospital hygiene and safety;
• elimination of risks arising from infectious waste transportation;
• lower storage and transport costs due to weight and volume loss;
• lower waste disposal costs;
• use of residue as refuse derived fuel (RDF).

Newster's medical waste sterilizer shredder: how does it work?

Newster’s treatment of hospital solid waste systems is carried out in a single depression chamber without risks for the environment and for the operator. No chemicals are used. The temperature inside the chamber is accurately measured in real-time by patented sensors during the cycle. The duration of the exposure to heat and the cycle parameters are controlled by a PLC. During the cycle, the system automatically generates a printed report, which the operator attaches to the worksheet at the end of each cycle. Sterilization can be proven by microbiological analysis of the residue and by efficacy tests using biological indicators containing Geobaciullus Stearothermophilus spores with a concentration of 10⁶.

Stage 1 of bio medical waste sterilizer: loading and starting

To begin the process, the operator loads the chamber with healthcare solid waste, closes the lid, and presses the cycle start button. Inside the closed sterilization chamber, in negative pressure, a powerful rotor fitted with stainless steel blades finely shreds the waste by impact and friction.

Stage 2: evaporation of liquids

As the material is roughly shredded, speed and temperature increase to 100°C, and the evaporation phase starts. The temperature remains steady until all the humidity has evaporated.

Stage 3: reach required sterilization temperature

When the humidity has been eliminated, the temperature starts to rise again reaching a peak of 150°C, as required for a complete sterilization according to STAATT Level IV. The finely ground waste is heated to its core and not only on the surface, for the time required to completely destroy microorganisms and bacteria.

Stage 4: cooling

The waste is cooled by sprays of water until it reaches a temperature of 95°C necessary for discharge.

Stage 5: unloading

The cycle is over and the treated waste is automatically unloaded. The sterile, finely ground, dry, and unrecognizable residue is significantly reduced in weight and volume.