Water

A plentiful quantity of potable water is the foundation of healthy communities and the catalyst for regional economic development. Harrison Grierson engineers routinely work with governmental organisations and industry to provide cost effective solutions for life’s most basic need.

Harrison Grierson process designs are based on relevant raw water quality and completed treatment plants range from conventional to membrane filtration along with treatment for specific chemical contaminants and various disinfection technologies. Individual treatment systems include reverse osmosis, ion exchange, granular activated carbon absorption, ozonation, ultraviolet radiation, and a wide range of chemical feed systems for coagulation, fluoridation, taste and odour control, disinfection and oxidation.

Network infrastructure is developed and designed through careful master planning; field inspection of physical conditions; hydraulic modelling of flows and pressures in existing or new systems; leak detection studies, design of pumping stations, rate of flow control systems, reservoirs and water transmission and distribution mains.

Pipeline route and conceptual design studies involve the selection of alignment; land acquisition; preservation of archeological sites and areas of natural significance; geological investigations and consenting.

	Water Treatment Fluoride Plant for Waikato District Council Harrison Grierson prepare a Concept Design Report for the replacement of the existing sodium fluoride plant with a new hydrofluorosilicic acid plant. The plant now meets the Australasian Codes of Practice for Fluoride Plants... view pdf
	Huia WTP for Watercare Services limited The Huia WTP treats water from five dams in the Waitakere Ranges, supplying about 25% of Auckland’s water requirements. For a population exceeding 1 million, it is crucial that the water supply is wholesome and uninterrupted... view pdf
	Ruakaka WTP Upgrade for Whangarei District Council The Ruakaka Water Treatment Plant at Whangarei is a critical national asset as it supplies water to the Marsden Point Oil Refinery. The plant has been upgraded from 3.6 ML to 12.0 ML per day... view pdf
	Suva WTP Upgrade for The Department of Public Works of the Government of Fiji funded by the Asian Development Bank Suva is supplied by two water treatment plants at Waila (110MLD) and Tamavua (60MLD). A major upgrade and refurbishment of both plants will ensure security of operation and compliance with WHO drinking water standards... view pdf
	Swimarama advanced ozone disinfection for Auckland City Council Auckland City Council engaged Harrison Grierson to undertake a condition assessment of the water treatment systems at nine council-owned and maintained public swimming pools…. view pdf