Wastewater

Wastewater

Community expectations and environmental standards for the treatment and disposal of wastewater are more stringent than ever.

Delta has people and resources to apply the latest environmental technology to treat and dispose of wastewater to high standards and reduce its impact on the water quality of natural lakes, rivers and the sea.

And because we are the infrastructure specialist, we can offer the complete package, combining wastewater know-how with project management, civil, electrical and mechanical expertise to deliver your next wastewater project seamlessly.

We design, build and maintain sewerage and wastewater reticulation and treatment systems, pipelines, offer pipe and drain cleaning, pipe cracking (the simultaneous cracking of old pipes while pulling through new ones), sump and septic tank services, closed-circuit television trenchless pipe inspection and horizontal drilling.

We do:

Milton Wastewater Treatment Plant

Complete upgrade of existing treatment plant including civil, electrical and mechanical works while plant in operation, supply and installation of screening and UV treatment system, new distributor arms, upgrade of trickle filters, new pipe work installation, electrical upgrade and new switchboard

Southland Vermiculture Sewerage Scheme

Installation of New Zealand’s first BioFiltro sewerage treatment scheme at Edendale and Wyndham using worms to digest sewage bacteria - producing clean, useable soil and dischargeable liquid

Christchurch Rebuild

Post-earthquake reinstatement and repair of underground water infrastructure including temporary repairs and inspection of damaged pipelines

Otago Corrections Facility Sewage Treatment Plant

Complete upgrade of existing plant to improve quality of discharge, including installation of new inlet manifold and outfall, improved trickling beds and UV treatment, civil, electrical and mechanical services

Southland District Council Sewerage System

New sewerage system for Tuatapere, Wallacetown, Edendale and Wyndham enabling septic tanks to be replaced by piped sewage disposal and a high standard of discharge treatment, removing risk of groundwater contamination, helping protect public health and the environment

Tahuna Wastewater Treatment Plant

Installation of two odour inhibitor tanks at Tahuna sewage treatment plant to absorb odours from the treatment process using wood bark and gravel filters, improving quality of life for neighbouring residents, visitors and golfers