The microwave sterilization technology. Dielectric material sterilization microwave equipment

   The microwave sterilization technology is based on the volume dielectric heating. It is 
   characterized by high efficiency of sterilization and high efficiency of the microwave energy
   conversion into heat energy.

   The equipment for soil and mineral substrates sterilization consists of the sterilization
   chamber, microwave energy source and control unit. The sterilization chamber is a
   rectangular microwave resonator with useful volume of 4,8 m3.

   The microwave energy source is a set of magnetron generators (from one to three
   depending on the required productivity). The control unit ensures the necessary operation
   conditions (time, power). The operation safety is ensured by the original construction of the
   sterilization chamber and blocking system.

Dielectric material sterilization microwave equipment

Microwave sterilization technology - It is a high energy-saving technology to sterilize the products and materials for different branches of industry and agriculture. High absorption of microwave energy by dielectric lies in the basis of this technology. It is free from intermediate heat-transfer agents.

Microwave sterilization technology enables to sterilize soil and mineral substrates used in hothouses when growing agricultural products. Soil microwave sterilization technology is based upon the sterilizing effect of microwave electromagnetic oscillations. The effect lies in a selective heating of pathogenic microorganisms which are important dielectrics. Эффект заключатся в избирательном нагреве. Under the impact of SHF pathogenic agents crumble away owing to their temperature high speed increase.

Microwave sterilization technology is characterized with:
  • high efficiency of conversion of microwave energy into thermal energy released in a heated product,
  • non-contact selective heating of the processed material,
  • thermal non-persistence.
The maximal cost of the technology and the equipment makes 470 000 $.

The use of microwave energy in thermal technological processes reduces specific power consumption by 25-40%. It also favors to stabilizing the quality of the processed material.

Microwave sterilization equipment

The equipment is aimed at sterilization of dielectric materials:
  • compost
  • humus
  • food supplements etc.
It can also be used for sterilization of mineral substrates in low-capacity technology hothouses the sterilization provides ELIMINATION of fungus and bacteria pathogens
  • infections
  • weed seeds
  • destructive insects
The sterilization enables RETENTION of
  • processed product value
  • soil fertility
The equipment includes:
  • heating resonant chamber
  • microwave modules
  • control board
Equipment design and capacity can be developed by Customer’s request.

Key features of the equipment for sack-packed subsoil sterilization

Performance, tons/24 hours 1…2
Power supply, KWt hours 8…9
Microwave modules count, pieces. 6
Operating frequency of electromagnetic energy source, MHz 2450+-100
Supply voltage 380 В, 50 Hz (220 V, 50 Hz)
Weight, kg 1800

Indices of microwave sterilization efficiency

Intensive spores.
before treatment, %
Intensive spores.
after treatment, %
Agents inhibition, %
Fusarium oxysporum
(root rot)
92.8 0 100%
Botritis cinera
(gray mold)
94.9 0 100%
Sclerotinia sclerotinian
(White rot)
85.4 0 100%
Corinebacterium michiganeuse
(bacterial cancer)
76.3 0 100%

Developmental stages
Amount of viable eelworms
in 0,1 ml of soil extract
before treatment
Amount of viable eelworms
in 0,1 ml of soil extract
after treatment
Larva 6.2 0
Female 7.0 0
Male 7.2 0

Agents before treatment
Agents after treatment
Ascohyta cucumeris spores - 17-18 pieces Mycelium fragments
Saprophytic fungi spores– bulk quantity Mycelium fragments
Colletotrichum spores – bulk quantity Mycelium fragments
Botritis cenerea spores – bulk quantity Mycelium fragments

Colonies availability
after radiation of living
Colonies availability
after radiation of dead
Agents inhibition, %
Ascochita 0 10 100
Colletotrichum 0 20 100
Botritys 0 16 100
Aspergillus 0 22 100
Mucor 0 40 100