CRS Odour Control System
The decomposition of organic materials produces characteristic odours. Aerobic decomposition is characterised by a sweet woody smell. However, if conditions within the decomposing material become anaerobic, the odours become stronger, sulphurous and more offensive in nature. The CRS IVC System is designed to ensure that aerobic conditions are maintained within the waste at all times, reducing the potential for creating obnoxious odours.
Air is circulated within the enclosed Composting Tunnels, further reducing the odour impact. However, there are times when air from the system has to be exhausted into the atmosphere. The CRS Odour Control System neutralises any odours associated with the exhaust air providing 24 hour protection against the emission of unwanted or nuisance odours.
The CRS Odour Control System operates in conjunction with the CRS Air Handling Unit. It is a self contained ozone production system housed in a stainless steel cabinet on the concrete roof of the Composting Tunnel. It consists of a compressor, oxygen producer, ozone generator, power distribution panel and control panel.
When fresh air is pumped into the Composting Tunnel by the Programmable Logic Controller, the used air needs to be removed. The exhaust gases pass, via sealed pipes, into a sealed Contact Chamber. The Programmable Logic Controller switches on the production of ozone, which is carried to the Contact Chamber where it is mixed with the exhaust air. Production of ozone is automatic but an emergency stop button is also installed.
Ozone is a powerful oxidant and will quickly oxidise any organic substance, including odour gases, it comes into contact with. The oxidation changes the chemical composition of the gases and reduces their odour potential by creating carbon dioxide and water.
To prevent the emission of ozone from the air treatment system, the discharge gasses are passed over a cartridge of carbon filter material, usually charcoal. By passing the gases over this material, any ozone remaining in the air is reduced to oxygen and carbon dioxide by reacting with the carbon in the filter.
When sufficient air has been replaced in the Composting Tunnel the Programmable Logic Controller stops removing waste air and ceases the production of ozone. Air recirculation then recommences. Ozone is therefore only produced when required.
