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EWI Systems

EWI has developed units and processes that effectively sterilize toxic and possibly infectious waste materials from hospitals and clinics. The MD series of processing units, with the MD-1000 as a flagship, are very effective medical waste sterilization units. They use the patented Reverse Polymerization approach to achieve sterilization, with a greater then 6log10 reduction of viable spores. 

Medical Waste


The MD-1000 is a three-stage, three-chamber medical waste reduction unit that produces a sterilized carbon residue. It processes all types of medical and infectious wastes including packaging, plastics, anatomical waste, glass, and metal sharps. The three chambers are for:

EWS has worked with key third-party suppliers to incorporate their products into the MD system to handle process control, nitrogen production, environmental control, material handling and power generation.

Medical waste enters the first chamber where a nitrogen purge is applied. The load is then weighed and the data is analyzed by the process control software. The waste is moved to the second chamber where microwave energy is applied directly to the load. In this chamber, the waste is reduced by Reverse Polymerization to a sterilized carbon residue. The final chamber allows the residue to cool prior to grinding. The sterilized carbon residue is removed from the third chamber by a pneumatic system and deposited in a holding container for disposal with other domestic or municipal waste.

Learn more about our medical waste breakdown and sterilization process.

Animal Waste Processing

The MD-1000 unit can be modified to process and reduce animal waste into its constituents. This waste ranges from natural refuse to biohazardous effluent materials produced during animal research. Called the AW-1000, this modified unit has many of the same specifications and follows the same process that the MD units do. Using the RP process, the AW-1000 quickly and efficiently carbonizes entire animal carcasses, achieving a mass and volume reduction of about 80% with a 6 log10 sterilization efficacy. 

Features & Benefits



Proven technology based on direct microwave energy

  • Destroys all types of biomedical waste
  • Generates a sterilized carbon residue suitable for municipal landfill disposal eliminating the risk of infection of health care workers
  • Eliminates special handling of red bag waste
  • Test results confirm greater than 6-log10 reduction in viable spores

Low vessel temperature process (150 -250°C)

  • Nitrogen environment inhibits the formation of hazardous toxic by-products such as dioxins
  • Meets MOE and US EPA standards with low cost commercial air emission control system

Stainless steel construction

  • Heavy-duty construction will extend the life expectancy of your capital investment
  • Easy to clean

Heavy duty grinder located at back of process grinds only sterilized product

  • No concern of infectious waste in grinder during maintenance
  • Handles sharps, glass and metals
  • No separation of waste types needed

Nitrogen gas supply with surge tank

  • No bottled nitrogen required
  • Backup supply of nitrogen ensures safe and orderly shutdown

Controlled by solid state PLC and components

  • Low maintenance and easily accessible spare parts
  • Increased operation time and reliability

State-of-the-art computer control system

  • Monitors entire process simultaneously
  • Minimizes operator intervention
  • Controlled shutdown procedure ensures safe operation without operator monitoring

User friendly interface

  • Ease of operation and interpretation of operating parameters will overcome any language barrier
  • Minimizes operator training requirements

Remote monitoring

  • EWS technicians can trouble shoot remote systems and optimize parameters on line to provide immediate service

Simplified loading

  • Reduces handling time
  • Increases safety
  • Eliminates the need for refrigerated storage

Measuring chamber

  • Each load is weighted by the control system to determine cycle time
  • Minimizes human error

Pneumatic conveying system

  • Carries sterilized carbon residue to remote disposal location
  • Minimize handling
  • Allows you the flexibility to locate the unit close to the collection point
  • Can be directly discharged into hoppers

Low energy costs

  • Reduces environmental services budget

Short cycle time

  • Eliminates the need for long-term refrigerated storage of hazardous waste

Capacity of 485 tons per year of medical waste

  • Significant throughput of red bag and anatomical waste

Final mass and volume reduced by 80%

  • Disposal issues are addressed efficiently
  • Significantly reduces landfill disposal costs for treated residue


U.S. Tire PatentMedical Waste Patent (Europe)Medical Waste Patent (Canada)
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