Application of SHF Oven for Neutralization and Utilization of Lab Waste

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Application of SHF Oven for Neutralization and
Utilization of Lab Waste

• Opochinsky E.F. , Sheenkov N.V.
• Laboratory of Special Danger Bacterial Infections
• Federal Center for Hygiene and Epidemiology
• Tel. [phone]

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• The most widely spread methods of lab and medical
  waste neutralization are now physical methods and
  among them thermal methods connected with using
  dry heat or wet steam at temperatures
  significantly exceeding usual vaporization
  temperature thanks to additional pressure created
  by autoclaves.
• Another physical method consists in application
  of radiation energy, for example, ionizing
  radiation (cobalt guns), high-frequency electric
  currents

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• An example of wide domestic application of such
  currents are microwave ovens. Laboratory
  analogues of such ovens is the equipment used
  abroad and now in Russia, an example of which is
  the medical waste neutralization plant (UOMO).
  The plant was created for neutralization of
  medical waste, mostly, of class B (danger) and C
  (special danger) directly in places of their
  initial generation.
• The method of its operation is based on the
  action of super high-frequency electromagnetic
  field on microorganisms in wet medium. The
  neutralization effect in the plant is produced
  thanks to generation of SHF electromagnetic
  field, high temperature, usually, up to 100
  degrees and medium moisture content
• Those who work in laboratories know very little
  about the plant, hence, it is so important to
  present the test results of the lab waste
  neutralization plant in order to improve safety
  of handling infected matter.

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• The plant is small in size (1200 ? 535 ? 565 mm),
  compact, its weight is 60 kg, it is made of
  high-quality stainless steel resistant to
  treatment with detergents and disinfectants, is
  not susceptible to corrosion
• The plant is fitted with two doors enabling its
  placement in the wall between the clean and dirty
  zones.
• The plant can be installed directly close to the
  waste generation seat in the same room. It is put
  on the desk so that the power cord can be plugged
  into standard electric line socket.
• The plant is also provided with an additional
  ceiling exhaust to extract neutralized vapor from
  the chamber.

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Neutralization Plant UOMO-01/150-?-CNT
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• Disinfecting time is set by turning knob TIME
  clockwise. The microwave energy level in the work
  chamber is set with knob Power.
• Automatic neutralization cycle equals to 60
  minutes
• The material subject to neutralization is packed
  in transparent bags put into re-usable
  polypropylene tanks.
• The tanks, each having the capacity of 30 l, are
  tightly closed with a special cap equipped with a
  bactericidal filter.
• The maximal load is 25 kg in the presence of 4 l
  of sensitizing agent enclosed in the scope of
  supply. The minimal load is 2 kg in the presence
  of 2 l of sensitizing agent. The sensitizing
  agent is a 20 detergent solution prepared by
  dissolving one table-spoon of the concentrate in
  2 l of water.

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• It is better to fill the tanks with bags to
  ¾ of the their volume with all types of waste.
• Needles, scarifiers are put in disposable
  plastic uncapped tare (for example, bottles from
  mineral water).
• Each tank is filled with tap water whereto the
  sensitizing solution is added.
• Thereafter, the bag is freed from air, the edges
  are closed by the bag is not tied. The tanks are
  tightly closed with caps.
• As neutralization indicators, test strips
  from Winar for 110 degrees are used.

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COMPARATIVE CHARACTERISTICSSHF-Plant vs.
Autoclave
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Vegetative Microorganisms Death Time
minutes
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Spores Death Time
minutes
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Fungi Death Time
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Viruses Death Time
Influenza A
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• Prospective Further Tests and Plant Applications
• Envelopes seminated with anthrax microbe spores
  (possibility of plant application in
  communication institutions)
• Sealed ampoules with live anthrax, plague and
  other vaccines (possibility of plant application
  in drugstore warehouses, utilization points for
  immune-biological preparations without opening
  ampoules)