Air given off from the biosolids treatment plant at Watercare’s Mangere wastewater treatment plant contains ammonia and odours. This air had to be captured and ducted away for treatment in soil bed filters. However firstly the ammonia had to be removed as it would have had an adverse effect on the soil bed filter biology.
Armatec supplied the extensive system of fibreglass covers, hoods, ducting, dampers, fans, and the ammonia scrubber.
The system has been working now for more than 15 years with only minor routine maintenance required.