Coffs Harbour WTP (CIA Alliance)

Client:

Coffs Harbour City Council

Location:

Coffs Harbour, New South Wales

Service:

Water treatment

Capacity:

42 ML/d

Value:

AUD $11.5 M

Problems:

Water supply essentially untreated (stabilisation and disinfection only) and not consistently meeting ADWG. Giardia/Cryptosporidium contamination risk. 

Solutions:

Full conventional water treatment plant with multiple barrier pathogen protection. 

Benefits:

Reliable supply of high quality drinking water to consumers.   

Product:

Full conventional treatment plant equipment from raw water pump station to treated water delivery. 

Completion Date:

June 2009

Contact:

Mark Aitken - Aquatec Maxcon

Aquatec Maxcon provided all mechanical works for the complete water treatment plant which comprised of the following main elements:

• Inlet works from Karangi Dam including raw water pump station and surge vessel.
• Pre treatment equipment for Mn oxidation contact tank, PAC contact tank and flash mixer stages.
• Flocculation mixing equipment.
• Dissolved Air Flotation/Filtration (DAFF) equipment (3 train system) including recycle pumping, saturation and dispersion system, float skimmers, filter media, plenum underdrains, backwash and air scour systems.
• Ultraviolet disinfection system, in pipe reactor design.
• Treated water pump station.
• Wastewater handling system including washwater balance tank, gravity sludge thickener and centrifuge mechanical dewatering.
• Service water and compressed air ancillary systems.
• Chemical storage and dosing systems for hydrated lime, CO2, PAC, alum, coagulant aid, filter aid, caustic soda and potassium permanganate.
• Fluoridation and chlorination systems.

Other related projects:

• Mt Beauty DAFF WTP (2010) design and construct
• bcaa Enoggera DAF WTP(2008) upgrade project.
• Kalkie DAFF WTP (2007) design and construct
• Ararat DAFF WTP Grampians Water (2000), 200 L/s
• Corowa DAFF WTP Corowa Shire Council (2002), 200 L/s