ECOSYST TECHNOLOGY GUARANTEES LOWER PRICES AND SAVINGS IN 5 WAYS:
MEDICAL WASTE STERILIZATION PLANT
THE BEST SOLUTION FOR
THE TREATMENT & RECYCLING
OF MEDICAL WASTE
The technology is patented and designed for the SHREDDING and STERILIZATION of medical waste with infectious risk with the use of steam
The system is equipped with a loading trolley that can be fed from above, with an automatic system, by introducing disposable containers and / or the contents of re ‐ usable containers.
The filling of the trolley begins the phase of preparation of the waste for subsequent sending to the sterilization phase.
The two phases are batch processes that can run simultaneously, i.e. during the sterilization process it is possible to start the preparation of a new load of waste.
Infected waste, loaded into the inlet bin after initial weighing, is lifted and tipped into the hopper. Once the loading operation is completed, the hopper is closed before starting the next phase.
The shredding takes place using a 4-axis knife shredder equipped with an automatic anti-blocking system. The refusal is discharged beyond under the shredder through a grid that allows to obtain the desired size. During the operation, it is nebulized inside of the loading hopper, a sodium hypochlorite solution aimed at sanitizing the hopper itself and reducing the lifting of dust.
The shredded waste is accumulated in a storage compartment which feeds the transfer screw to the sterilization chamber. The storage compartment, in addition to homogenizing the load subjected to shredding, regulates, through filling sensors, the introduction of new waste to the hopper.
The automatic preparation cycle takes place by keeping the loading hopper in depression in order to avoid the escape of emissive components.
The flow sucked in by the filter group is treated by:
- HEPA filter
- Activated carbon filter
- Centrifugal compressor
This emissions treatment system makes it possible to obtain a flow that complies with the standards set for the air in the workplace. Since these standards are more restrictive than those provided for atmospheric emissions, the conveyance can take place both in the environment where the system is installed and outside.
The waste accumulated in the storage compartment is sent to the sterilization chamber by means of the transfer screw designed to transport the waste to the entrance. The filling sensors, enslaved to the storage compartment, allow to check the complete emptying through a control PLC that allows the management of the solenoid valves through a pneumatic circuit operated by a compressor.
Once the waste transfer is complete, the sterilization chamber is closed by means of a specially designed interception valve and the thermal cycle is started. The saturated steam produced by the generator is flowed into the waste, kept in motion by a spiral stirrer. The combination of flushing and stirring allows the saturated steam to penetrate throughout the mass being treated. Using this system it is possible to reach, within the mass of waste being treated, the maximum obtainable conditions equal to 165 ° C at 6 bar of pressure, allowing a reduction of the bacterial load such as to guarantee a S.A.L. (Sterility Assurance Level) not less than 10-6, as evidenced by the efficiency test issued by the University of Bari. The time / temperature conditions of the automatic cycle are defined during the configuration of each individual system according to: type waste treated, humidity level, operating potential, etc.
Furthermore, inside the sterilization chamber, there is a housing in which the bioindicators will be introduced in the form of vials containing a strip of Geobacillus Stearothermophilus spores useful for complying with the provisions of the UNI 10384/94 standard.
After the sterilization phase, the chamber is brought back to atmospheric pressure through a valve suitable for the escape of the steam, which is recovered and condensed by means of a chiller. This allows for reuse in the following cycles. Subsequently, a depression is created which allows the evaporation of residual moisture. This evaporation also implies a cooling of the waste.
Before proceeding with the unloading of the sterilized waste, a suitably designed auger is automatically positioned, by means of the PLC management, under the sterilization chamber to receive the outgoing waste. The auger is then activated to transfer the waste into a final container. At the end of the unloading phase, the auger returns to the initial position. The process is completely managed by a PLC.
The system is installed on a self-supporting frame made of steel profiles which allows a simple and quick installation, has a footprint of approximately 1170L x 710P x 600H (cm), with a consumption per treatment cycle which varies according to the types and quantities of treated waste.
The technology, on board the panel, provides for an integrated printer in order to archive the most important parameters of the cycle:
- At the beginning of each cycle, the identification of the manufacturer, date and time, the identification of the sterilizer, the identification of the selected program, the progressive number of the cycle associated with the batch with the name of the hospital are recorded;
- At each phase of the cycle, all the phases present in the cycle and all the values of the important variables of the process are recorded, including the maintenance time and temperature in the sterilization phase;
- At the end of the cycle, the validity of the completed cycle or the indication “cycle aborted” is reported.
Finally, the report has the further purpose of relieving the operator who carries out the operation from any liability.
THE TECHNOLOGY USES SATURATED STEAM UNDER PRESSURE WITH NO WASTE LIQUIDS IN THE SEWER AT THE END OF THE CYCLE.
This way you avoid:
- Connection to the sewer system;
- Contaminated and / or infected liquids deriving from the process;
- The instrumentation for continuous monitoring and analysis of sewer discharges;
- The management costs for the storage and disposal of hazardous liquids.
Technology allows to obtain reduced waste by weight equal to 10% and by volume equal to 80% totally safe.
LOADING OF WASTE AT RISK OF INFECTIOUS AND UNLOADING OF STERILIZED WASTE
As part of the project evaluation, the hypothesis of equipping the plant with an energy recovery system of the RDF produced which may eventually receive waste as per code 191210 will also be evaluated from other production plants of the same. In this way it is considered possible a high recovery of energy to be used on site to feed the waste management and sterilization process.