Nelson North Wastewater Treatment Plant (WWTP)
Nelson City Council
Ongoing operations and maintenance contract for a regional wastewater treatment plant
2008 – present, with sole contract responsibility from 2011
Nelmac operates and maintains the two treatment plants in the Nelson region, one of which is the Nelson North Wastewater Treatment Plant (NNWTP).
The NNWTP has primary screening, a primary clarifier, a trickling filter, one 26ha baffled oxidation pond, two 7ha planted wetlands, and sea outfall.
Nelmac manages the treatment plant to perform to resource consent conditions. We undertake routine maintenance of all plant and equipment including SCADA and we are responsible for all operations 24/7, including emergency response. Our team conducts routine maintenance, minor repairs, and project upgrades as necessary. Outside the facility, we also manage vegetation control, vermin or pest control, and general exterior building maintenance as well.
This treatment plant has had a problematic history with respect to odour complaints. Since Nelmac has taken on the full operational contract, we have managed the plant essentially odour free and well within consent requirements. (CONFIRM STILL ACCURATE AFTER RECENT ODOUR EVENTS)
Nelmac’s commitment to improve the operation and perception of this treatment plant by working closely with the Principal’s representatives, the public, and other affected parties to understand the situation was a major contributing factor to the reduction in odour events.