Water Journal : Water Journal September 2012-1
refereed paper water recycling water SEPTEMBER 2012 87 Abstract Hunter Water Corporation (Hunter Water) is a State-owned corporation providing water and wastewater services to over half-a-million people in the Lower Hunter region of New South Wales. Hunter Water aims to pursue sustainable water recycling opportunities as a substitute for potable water and as a way of managing effluent discharges from its wastewater treatment plants (WWTPs), where financially and environmentally feasible. During 2011--12, approximately 4,660ML of recycled water was supplied to customers by 16 recycled water schemes, of which 40% directly substituted the use of potable water. During this period, approximately 7% of the total effluent treated was recycled. These recycled water schemes at Hunter Water consisted of a number of agricultural and municipal irrigation applications, as well as two significant industrial reuse schemes. The recycled water was supplied from 10 out of 18 WWTPs owned by Hunter Water, with performance of the schemes regularly monitored by Hunter Water's Recycled Water Quality Committee as well as other key Hunter Water personnel and senior management. A number of studies are currently underway to identify further recycled water opportunities in the Lower Hunter, both for effluent management and for water security. This includes the Lower Hunter Recycled Water Initiative, which is expected to save 3,730ML/year of potable water and almost double the volume of recycled water used in the Lower Hunter, and other studies concentrating on decentralised wastewater, greywater and stormwater reuse. Introduction Hunter Water's area of operations covers 5,366km2 with a population of almost 600,000 people in the local government areas of Cessnock, Lake Macquarie, Maitland, Newcastle, Port Stephens, Dungog and a small part of Singleton in New South Wales (Figure 1). Hunter Water's area of wastewater operations is serviced by a system to transport and treat wastewater received from over 215,000 properties including 4,792km of sewer mains, 380 pumping stations and 18 WWTPs. Hunter Water's area of water operations is serviced by a system to extract, treat and supply drinking water to over 230,000 properties including 4,930km of water mains, six water treatment plants (WTPs), two surface water storages and two groundwater resources. The Hunter region's drinking water supply delivers about 180ML/day on average, extracting water from eight catchments with a total area of 2085km2. Regulatory Framework The NSW Government regulates Hunter Water's operations through a number of regulatory instruments, including an Operating Licence. The NSW Environment Protection Authority (EPA) licenses the operations of the wastewater pipe network and WWTPs under the Protection of the Environment Operations Act 1997. The NSW Office of Water (NOW) licenses the extraction of water from natural surface and groundwater sources for the region's drinking water supply. NSW Health, through a Memorandum of Understanding (MoU), establishes the scope of the drinking water monitoring plans and procedures for communicating results of water quality monitoring programs. Hunter Water's operational V Shah, B Jennar, E Turner, T McClymont An overview of agricultural, municipal irrigation and industrial reuse schemes implemented by Hunter Water Corporation RECYCLED WATER SCHEMES IN THE LOWER HUNTER REGION, NSW Figure 1. Hunter Water's area of operations.
Water Journal November 2012-1
Water Journal August 2012