Compounds responsible for mal odours are mainly hydrogen sulphide and reduced organic compounds of sulfur (dimethyl sulphide, mercaptan, etc.).
Air Clean has significant experience in this field and utilizes both physical/chemical systems (chemical scrubbers, activated carbon) and biological systems (biofilters, biotrickling, bioscrubber).
The most interesting technology in this area are biotrickling filters because of their simplicity of operation, high efficiency and low full life cycle costs.
Biotrickling filters combine low costs of operation and maintenance (typical for biological systems) along with treatment of higher concentrations of pollutants in comparison to traditional biofilters.
Air Clean is an exclusive distributor of MónaShell® biotrickling technology. This technology is based on the utilisation of naturally occurring recovered seashell for use as an attached growth biotrickling media. This offers enhanced performance and reduced water consumption due to the calcium carbonate in the shell material that neutralizes acids and maintains the pH in the optimum range for biological treatment. The biological oxidation of in-organic odorous compounds such as H2S and mercaptan produces acid that can lower pH and impact negatively on system performance.
Realization of totally closed systems with final dispersion through an exhaust stack is one more advantages of this process.
Biogas purification (removal of H2S) by biological cleaning
Removal of odour and acidic gases produced by wastewater treatment plants using biological technologies, chemical scrubbing and activated carbon systems
Air Clean manufactures equipment for odor abatement for municipal and industrial wastewater treatment plants using both biological technologies and established technologies such as activated carbon and chemical scrubber.
For each application on a case by case basis the best technology is selected either on a standalone or multi stage basis to solve the specific problem of the customer.
The lead technology we offer is the biotrickling MónaShell® technology in single and dual pass and dual media configuration. These latest generation of biological systems are able to treat very high concentrations of inorganic pollutants such as 400 ppm hydrogen sulphide and up to two grams of VOC per m3 with excellent removal results.
Using this technology we have successfully completed over 400 installations worldwide.
Reference technology
Noise attenuation for blowers buildings
Air Clean supplies noise abatement systems for process blowers in wastewater treatment plants. These systems normally consist of silencers, by sound traps to be applied to the walls of buildings in which the blowers are installed.
Reference technology
Removal of odour and acidic gases produced by the wastewater pumping stations using biological technologies, chemical scrubbing and activated carbon systems
Sewage lifting stations are often critical applications in terms of production of mal odours as the effluent they receive is often in a anaerobic condition.
Air Clean is able to provide modular systems for the deodorization of the pumping stations using both conventional technologies (activated Carbon and chemical scrubbers) in addition to the latest generation of biological technologies.
Reference technology
Air treatment systems (dust removal, odour removal, heat recovery) for sludge drying plants
The area of sludge drying for the sludge produced in wastewater treatment plants is becoming increasingly important given the difficulties linked to the disposal of sludge in landfills themselves.
The sludge dewatering normally involves the emission of odorous gases in high concentrations greater than those that can be found in the normal processes related to water purification.
Air Clean has developed specific approaches to the solution of these problems working with leading international manufacturers of sludge drying plants.
Reference technology
Biogas purification by using chemical scrubbers and catalysts for hydrogen sulfide removal
The production of biogas from liquid waste or industrial is becoming increasingly important. However, Biogas may contain hydrogen sulfide impurities which must be removed before it can be used to produce electricity or even to be converted into biomethane.
Air Clean exclusively distributes a system patented by Bord Na Mona made up of special auto tyre CrumRubber TM which in combination with sulphur reducing bacteria is able to remove hydrogen sulphide and a high percentage of volatile organic siloxanes.
Additional technologies include chemical reduction systems using activated carbon.
Reference technology