Biofilters

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Biotechnology
Biological cleaning of waste gas from contamination by organic substances is a simulation and intensification of processes running in natural conditions, summarily called self-cleaning. Biological cleaning is economically more advantageous compared to physically-chemical and chemical processes with the same efficiency, and it does not bring into the environment contaminating substances (full degradation of contamination in a certain concentration range), for example, ash, inorganic salts, etc.


Biofilter principle
Biofilters operate on the principle of biofilm, which covers the particles of the material used and the filling of equipment. Volatile pollutants are dissolved together with oxygen in the moistened biofilm and are metabolised by micro organisms under aerobic conditions. Such metabolites (CO2) diffuse by a biological layer, are converted into the gas phase and are collected from the device.
It is necessary to ensure a supply of mineral nutrition for micro organisms in the biofilter (in particular, phosphor and nitrogen), moisture and oxygen air. It is also necessary to ensure the proper pH, temperature and permeability of the filter medium for the achievement of maximum efficiency of the process. Biological filters for cleaning of air are designed for volumes within the range of flow from 100 to 10,000 m3/hour, in the case of cleaning of water 1-100 m3/hour.

biofiltry

 

Biodegradation in the biofilm on the surface of the particle of the filter medium.


Areas of use:
  • paintshops, lamination workshops
  • degreasing of parts
  • production of plastic materials
  • production and processing of paints
  • pharmaceutical production
  • cleaning of inert gases
  • elimination of odours
  • renovation technologies
  • printing houses
  • food industry

Suitable for commonly degradable contaminants:
  • oil hydrocarbons
  • BTEX substances
  • less chlorinated hydrocarbons
  • alcohols, ammonia
  • sulphides
  • methyl-sulphur alcohol
  • dimethyl-sulphides

Not applicable for:
  • removing of PAH substances
  • PCB
  • more chlorinated hydrocarbons

Biodegradation products:
  • H20
  • CO2
  • other substances according to the content of contamination
  • biomass

Approved technology:
  • • DEKONTAM-AIRŽ (Resolution of SZÚ No. CHŽP-35-143/99 (1016) Ex: 191555 of 20.10.1999)
  • • HUMIN-AIR (Resolution of SZÚ No. CHŽP-35-309/03 (101) Ex: 3020635 of 24.6.2003).

DEKONTA provides the following services in the area of delivery of biofilters:
  • Package supplies of biofilters, including elaboration of the project, the company’s own supplies, commissioning and ensuring all related measurements
  • Supply of filter media for existing biofilters and their biological revival
  • Design of biofilters and implementation of semi-operation verification tests
  • Optimising of the operation of biofilters (testing of various kinds of filter media, optimising of operating parameters)
  • Servicing and maintenance of biofilters.