FR2715850A1 - Hospital waste treatment procedure, useful for disposal through normal waste systems - Google Patents

Abstract

Procedure, esp. for treating small quantities of waste e.g. 1-10 litres in volume, consists of first disinfecting the waste by direct heating using an electrical resistance followed by shredding, filtering the air to remove noxious odours, and elimination through standard domestic or industrial waste systems.

Description

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WASTE PROCESSING SYSTEM

HOSPITAL

  Indication of the technical field The system is based on: Disinfection by direct heating using an electrical resistance, grinding and treatment of odors from small hospital-medical waste, with a view to their elimination by standard circuits of household waste or industrial.

  State of the art The elimination of hospital-medical waste can only be done in large incineration furnaces, at the level of regional authorities or by processes of insertion in disinfectants associated with grinding systems.

  These systems do not allow the local treatment of small quantities of waste.

  Sterilization systems based mainly on steam are designed to sterilize equipment before medical use and provide no solution for hospital medical waste and the emanation of odors and their grinding.

  Existing grinding systems make it possible to reduce waste in small pieces but do not provide any solutions to the problems of contamination and odors.

  There is a system (Patent) EP400676A3 based on sterilization by circulation of hot air then grinding, but this system does not have any odor filtering system. It requires a connection to the external ventilation duct of the building, which often does not exist in individual dental-medical offices. Uses sterilization by complex hot air circulation conveying noséabondes odors unsuitable for low volumes, unusable in individual medical offices.

  Invention The invention of the system is based on the association in the same set of a direct heating receptacle by electrical resistance receiving the waste for a period guaranteeing the sterilization is from 190 to 250 for half an hour without circulation of hot air noséabondes .

  Associated with an air filtering system allowing the removal of all activated odors only after sterilization and cooling.

  Associated with a grinding system to reduce waste in small volumes. -.-

  Detail of the invention This system consists of a container of a few liters with an airtight lid to odors.

  This container surrounded by a direct heating system by electric resistance equipped with a thermostat and a clock makes it possible to heat during the disinfection time that is half an hour at a constant temperature of 190 to 250 the waste contained in the container.

  A ventilation system ensures the circulation and filtering of air for the elimination of activated odors only after disinfection before opening the lid.

  Waste disinfection is the reverse of the hospital principle which requires sterilization before use of the products and not after.

  A mechanical grinding system ensures the small volume packaging of disinfected waste.

  Disinfecting the waste in the first phase eliminates all risks of contamination in the later phases of the process.

  Filtering odors after disinfection-sterilization allows the device to be used inside a treatment area. The absence of air circulation prevents the diffusion of noséabondes odors, the starting of the ventilator once cooled allows the use of the activated carbon filter unusable with hot air.

  The unit provides independent treatment of low-volume hospital medical waste in the offices of independent practitioners.

  Industrial applications The hospital medical waste treatment system is used to equip all liberal professions in the medical field (dentists, doctors ...) as well as all 2S of hospital organizations at each service level.

  The system can treat all daily waste: needles, compresses, and ensure disinfection and grinding. The disinfected and shredded waste thus generated can be included with household or industrial waste.

  The system is only intended for low volumes and operation by cycle independently.

  The use of direct heating without circulation of hot air and an odor filtering system makes it specific.

  Detailed description of drawing n I The system consists of a container (n 1) with a capacity of the order of 1 to 10 liters, closed by a lid (n 2) ensuring impermeability to odors, a heating resistance system (n 3) fixed on the sides of the container allows to obtain a temperature of at least 190 for half an hour in the center of the container, a thermostat system (no 4) associated with a control system (n 5) ensures the temperature rise, maintaining at 190 for 1/2 hour and the whole cooling cycle. A tubing system (No. 6) associated with a fan system (No. 7) evacuates the air through an activated carbon filter (No. 8). The bottom of the inclined container (ne 9) drives the waste by gravity to a grinding wheel (n 10), this wheel being able to be actuated by a crank system (n 11) or driven by a motor (n 12).

  The waste thus disinfected and ground falls into a container (n 13), a control system (n 5) ensures the normal progress of the operation and checks: - The locking (20) of the cover during the complete cycle The locking (20 ) from the crusher during heating - Thermal regulation at 190 for 1/2 hour A thermal insulation system (ne 15) surrounds the container, all of which must be enclosed in an external box (no. 16).

NCIPE QDE FONCIONNEMINT

  A green light (# 17) indicates that the system is on and ready to operate.

  The operator lifts the cover (key 2) and places his paper waste bag in the container.

I] closes the cover.

  The grinding system (n0lO) is locked (21) and prevents any waste from falling.

  251I presses the start button (n 18) which locks (20) the cover (n 2) and the grinding system (n 10). A red indicator light (No. 14) is heating up.

  The control system (key 5) ensures the temperature rise of the container and its contents thanks to the heating resistors (key 3).

  The thermostat (n 4) associated with the control system (n 5) guarantees that the temperature is maintained at 190 for 1/2 hour of the content.

  The control system (n 5) after the heating cycle allows the assembly to cool down naturally to 60. At 600 the odor evacuation system (pipes N 6, fan no 7, activated carbon filter no 8) are switched on for 15 minutes.

  The control system (n 5) activates the orange grinding light (n 19) and unlocks (20) the grinding system (n 10).

  The pipes (N 6) recover the gas which has passed through the partition of the container from top to bottom in order to guarantee that the gases thus filtered are disinfected by heat during heating.

  The grinding system no 10, 11 or 12 reduces the waste into small pieces which are collected in the container (N 13).

  lO After 10 minutes of grinding, the cycle ends, the green light (17) is reactivated again, the grinding system (n 10) locked (20), the cover (n '2) unlocked (20) , the system is ready for a new operating cycle.

  The introduction of the waste put beforehand in a paper sag avoids during the heating that waste sticks on the parroies of the container (1 and 9).

Claims (5)

  1) - Process for treating hospital waste, characterized in that it comprises: disinfection by direct heating using electrical resistance, grinding and filtering of odors from low-volume hospital-medical waste ranging from i to 10 liters for disposal by standard circuits of household or industrial waste.   2) - Device for implementing the method according to claim 1, characterized in that it is composed of a container (1) associated with a set of direct heating by electrical resistance (3) allowing to obtain a temperature - high temperature of the order of 1900C for half an hour ensuring disinfection without the circulation of foul-smelling hot air.   3) - Device according to claim 2, characterized in that the container of direct heating by electrical resistance is connected to an autonomous filtering system (8) of odors with activated carbon.   4) - Device according to claim 2 or 3, characterized in that it comprises a grinding system (10) to reduce crumbs the waste after heating.   5) - Device according to claim 4, characterized in that the grinding system is actuated by an electric motor (12).