Waste Gas Treatment

  • Biofilter
  • Wet scrubber
  • Activated Carbon Filter
  • Biotrickling filter
  • Chlorine neutralization

Biofilter systems

Waste gas treatment and odour control systems

Biofilter for Odour Control

LIKUSTA biofilter systems are designed as single or multistage units according to the actual requirement for instance with a preset humidifier, bio- or chemical scrubber.

Due to close cooperation with universities, and research centers, latest scientific knowledge is available during process engineering. Applications of environmentally friendly systems for biological gas treatment increase steadily nowadays. The polluted gas passes through a pourus carrier. The micro organisms settling on the organic carrier convert air pollutants into CO2 and water.

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Wet Scrubber

3-stage cross flow scrubber

Liku-Tech / Likusta offers Chemical based wet Scrubbers that are efficiently and effectively designed to remove gas pollutants. Often these pollutants are chemicals such as hydrogen sulfide, ammonia, chlorine or sulfur compounds. Chemical Scrubbers work by dissolving or absorbing the pollutant into the scrubbing liquid. The scrubbing liquid used will depend on the properties of the targeted pollutant.

High efficiency removal of many gas pollutants is common in many applications. Chemical based wet scrubber selection will depend on the operating process characteristics and the particular pollutant(s) that is being removed. We works closely with our customers to determine the appropriate technology to use depending on their process and the application.

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Activated Carbon Filter systems

Carbon Filter in PEHD - 13.000 m3/h

Waste gas treatment and odour control systems.

Activated Carbon Filters are designed and used for the removal of vapors and odours which still may be present within the air or gas flow.

The main odorous gases commonly found in sewage / biogas are:

  • Hydrogen sulphide
  • Indole and skatole
  • Methyl mercaptan
  • Methylamine
  • Ammonia

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Biotrickling filter systems

Biotrickling Filter - Pilot Plant

Waste gas treatment and odour control systems

Biotricklingfilter combines the advantages of biofilter and bioscrubber processes for purifying waste gas. Waste gas flows through a biomedia filter bed. An automatically controlled spraying nozzles system is installed above the biomedia filter bed in order to spray water with nutrients and minerals water onto the filter bed.

The nutrient liquid ensures optimum biological process conditions for the microorganisms, which settle to the surface of the filter bed’s carrier material.

The microorganisms convert the pollutants into CO2 and water. The nutrient liquid re-enters the filter by spraying nozzles due to a circulation system.

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Chlorine neutralization systems

Chlorine Gas Scrubber, Vietnam

Waste gas treatment and odour control systems

Chlorine-Emergency-Neutralization devices are scrubbers for the prevention of Chlorine emissions in case of accidents caused by the deliberation of Chlorine from storage tanks, drums, Chlorine bottles or Chlorine dosage facilities used in water treatment and chemical industry.

An alarm is set by a Chlorine alarm system which then activates the LIKUSTA-Chlorine-neutralization-unit. The exhaust air is guided through the LIKUSTA counterflow packed scrubber by means of a chemically resistant fan. According to the size of the facility a certain amount of washfluid (10 - 20 % NaOH) is sprayed via nozzles into the counterflow by means of an immersion pump.

Chlorine Gas Scrubber with Sun Shed

The heat of the chemical reaction during the washing process is absorbed by the washing liquid itself. For the generation of the required exchange surface chemically resistant packing materials are used.

The packing materials provide for the maximum exchange surface and smallest unit size with a minimum of energy needed. Before the neutralized exhaust air leaves the scrubber, mist and aerosols are retained by a demister unit with an efficiency of 98%.

The neutralization units are designed for transportation in sea containers (export) and - if required for transportation purposes - provided with a separating flange. The assembly of the unit as well as the start up can be done by the customer since all components are already hooked up and electrically connected.

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