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Construction progressing well at Recycled Water Plants

26 September 2017

Population growth in the region is leading to an increase in sewage flows – and close to $37 million investment by Western Water to ensure the system can cope into the future.

As part of Western Water’s capital works program, upgrades are under way to three of Western Water’s recycled water plants at Sunbury, Melton and Gisborne, to increase sewage treatment capacity and recycled water quality.

The upgrades will ensure the plants can cope with increased sewage flows due to population growth, with each town projected to grow significantly in the years ahead.

Western Water operates a dedicated sewerage network, which transfers sewage from homes and businesses via sewer pipes and pump stations to one of our seven recycled water plants for treatment.

We invested $65.1 million in capital works in 2016/17 and in the next five years expect to spend around $80 million a year. 

Sunbury Recycled Water Plant

Sunbury Recycled Water Plant membrane pumps

Over $27 million has been spent to date at the Sunbury Recycled Water Plant, including the recent construction of a new membrane tank and associated pipework (pictured), a 28-metre high odour control stack, expanded dewatering facility and new inlet works.

The Sunbury plant was originally designed to treat an average of 6.5 million litres of sewage per day from homes in Sunbury and Diggers Rest—after the upgrade, it will be able to treat 9.2 million litres per day. The $53 million project is being delivered under a design, build and 10-year operate contract with Downer Group.


Melton Recycled Water Plant

Melton Recycled Water Plant digester under construction

Construction is under way at the Melton Recycled Water Plant on a new $8 million digester (pictured), with the concrete base poured and works commencing on the external walls. A digester is technology that converts sewage into decomposed waste that after further treatment is then suitable for use as a natural fertiliser. It is also converted into a methane gas burned as fuel to produce electricity at the site. The new unit is expected to be completed mid-2018.


Gisborne Recycled Water Plant

Gisborne Recycled Water Plant under construction

Excavation works (pictured) have started on a new $1.6 million UV filtration and disinfectant system at the Gisborne Recycled Water Plant.  This is the first of several planned upgrades for the site in the next few years, including a new de-watering system, bio-reactor unit, clarifier treatment tank and new inlet works.

More information

For more information about our projects, click here.


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