Capita Real Estate and Infrastructure is designing the first carbon and ultra violet light (UV) odour control unit (OCU) in a waste transfer station (WTS) in the UK. A handful of similar systems have been installed on other sites in the UK, for example anaerobic digestion and food processing, however, never for a WTS. The design solution combines the industry standard of activated carbon filters, with innovation in the form of UV lamps to minimise the amount of odour released from the WTS.
The system designed includes the ColdOx UV system developed by CentriAir, followed by activated carbon beds, to reduce the odour being emitted from the WTS. In the ColdOx system, the Volatile Organic Compounds (VOCs) responsible for odour are oxidised by means of high intensity UV light. Using this system alone, the odour reductions are typically in the region of 85-95%. Although the ColdOx system in itself, with UV, gives a high efficiency, incoming loads and performance demands may at times be difficult to handle. But when ColdOx is then installed in combination with an active carbon filter, it adds a second stage that offers complementary treatment of the gas.