The Central Interceptor is the largest wastewater project in New Zealand history.
From concept to construction and now operational maintenance, Armatec Environmental is the Odour Control System partner for Watercare and Gella Abergeldie JV at the May Road Air Treatment Facility in Tāmaki Makaurau / Auckland.
The May Road Air Treatment Facility (May Rd ATF) is on a small site with complex geology. It is in the wind shadow of Puketāpapa / Mt Roskill and has residential and light commercial neighbours close by.
Starting with these challenging constraints, Armatec led the design of the May Rd ATF from concept through to the construction of a highly innovative Odour Control System (OCS) – that met and added value to the original brief. This complex system is at the mid-point of the 16.2km, 4.5m diameter Central Interceptor tunnel, running from Pt Erin to Māngere. It is positioned where two key flows combine, the main tunnel and the branch Link Sewer C tunnel. Sewer gases are extracted here at automatically varying flowrates by the OCS, based on changing sewer conditions.
Armatec designed, built, installed, commissioned and maintain the Air Treatment Facility at May Road
The plant is engineered to exacting standards and treats between 9,000 m3/hr - 32,400 m3/hr of odour. It has two stages of odour treatment with vessels and ducting both above and below ground, arranged to minimise the site footprint. Stage one, the Biological Trickling Filter (BTF), harnesses naturally occurring bacteria to remove the vast majority of incoming odour. Stage two, the polishing stage, utilises activated carbon to remove any remaining odours, before discharging at height via two stacks.
The facility has an innovative, low-profile, false-façade design to blend in with the surrounding light industrial buildings. It features extensive noise controls to minimise impact on the community. The system was designed and built at the Armatec factory in Taranaki with installation and commissioning being undertaken onsite. Ongoing operational and maintenance support is also being provided. Proudly locally owned and operated, Armatec has been working to reduce emissions to the environment for over 43 years in Aotearoa New Zealand and abroad.
For any odour control challenge, need or operation phone: +64 6 755 0410 or email: enquiries@armatec.co.nz
