Monday, 19 October, 2015

Repair work to begin on Lyttelton Wastewater Treatment Plant

Earthquake repair work will begin on the Lyttelton Wastewater Treatment Plant on 27 October 2015 following Labour Weekend.

The plant suffered structural damage to the basin during the Canterbury earthquakes which has caused a build-up of grit and sand and a loss of capacity.

The plant will be taken out of service for the duration of the repair work, which is anticipated take two weeks to complete.

Wastewater will continue to receive full primary treatment on site by temporary tanks, followed by the usual ultra-violet disinfection process before being discharged through an outfall pipeline into Lyttelton Harbour. The primary sedimentation sludge will be removed and transported to the Christchurch Wastewater Treatment Plant for processing.
Located below Sumner Road between the container terminal and the coal stockpile yards of the Lyttelton Port Company, the plant treats wastewater from the Lyttelton, Rapaki, Corsair Bay and Cass Bay communities.

The Lyttelton Wastewater Plant is expected to remain operational until 2021. It will continue to be an integral part of the Lyttelton Harbour Wastewater scheme which aims to halt the discharge of treated wastewater from the harbour by pumping it to the Christchurch Wastewater Treatment Plant by 2022.

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