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    Our Customer Service Offices in Laurieton, Port Macquarie and Wauchope will close for the Christmas/New Year period commencing 2:00 pm, Tuesday 24 December 2019 and will reopen on Thursday 2 January 2020 at 8.30 am.

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Wauchope Sewerage Scheme

The Wauchope Sewerage Scheme comprises a wastewater treatment plant (/wwTP), a network of pipes and 18 pumping stations.  The WwTP is located in Bain Street Wauchope and was augmented in the early 1990s.

The plant has a capacity of 8,000 EP - in other words, it has the capacity to treat an amount of raw sewage equivalent to that generated by a population of 8,000 people.    

Pre-Treatment

Pre-treatment is relatively simple yet very effective at Wauchope and involves screening.  The removed solids are sent to landfill.

Main Treatment

The Wauchope WwTP, like most other WwTPs in Australia, involves the process of activated sludge. The particular method of activated sludge treatment that is used in Wauchope is Intermittently Decanted Extended Aeration. This method is generally preferred in regional areas because of the high quality effluent produced along with its simplicity and cost effectiveness compared to other methods. It is simple because the essential activated sludge processes of aeration, settling, decanting and sludge removal are all carried out in a single lagoon rather than having separate vessels for each.

Following decanting, the effluent at Wauchope is transferred to three tertiary ponds for natural disinfection with UV rays from the sun. The volume in the pond system allows up to 15 days retention time and provides an adequate level of UV radiation prior to discharge into the Hastings River.

To make the best use of our water resources, some of the treated effluent from the Wauchope WwTP is being reused on the Wauchope Golf Course and a nearby farm, with only the leftover water discharged to the Hastings River.

Sludge Treatment

Sludge generated from Wauchope WwTP is collected in two sludge lagoons on site, which serve to hold the sludge and allow it to settle, with any water released from the ponds returned through the treatment process. 

Like all organic solids produced by wastwater treatment in the Hastings, the biosolids from Wauchope are transported to the Cairncross waste facility to be incorporated into compost.

This page was last updated on: 22 November 2019