Water Journal : Water Journal June 2013
JUNE 2013 WATER 109 Water Business • Assisted numerous clients in transitioning from chemical scrubbers to biological odour control systems; • Activated sludge treatment: Understanding where these systems can reduce odour and enhance plant operation. Some recent projects include: • Gippsland Water Factory, Victoria: Designed and constructed odour control for a 35MLD plant and three pump stations; • Sydney Water Corrosion and Odour Management Program: Developed a long-term management strategy for the multiple collection networks; • Coongulla-Glenmaggie Sewer Scheme and Loch Sport Sewer Scheme, Victoria: Investigated suitable odour controls for pump stations associated with municipal pressure sewer systems; • Corrosion and Odour Management of North Yarra Main, Victoria: Conducted a study including modelling of wastewater and ventilation to develop a strategy to manage one of Melbourne's oldest sewer mains; • Bufferzone Analysis, Queensland: Investigated buffer zones as an effective mitigation method to reduce odour complaints associated with wastewater treatment plants and pumping stations. For more information, please call Jeff Mann (02) 9950 0233 (email jeff.mann@ch2m. com.au) or Josef Cesca (02) 9950 0218 or email email@example.com, or visit the website at: www.ch2m.com FUTURE-PROOFING OUR MOST PRECIOUS RESOURCE Australia is the second driest continent in the world but it still has the highest global per capita rate of water usage, despite the recent "millennium drought" that affected so many rural and urban households. The millennium drought is the last in a long line of 12 severe, extended dry periods that have affected much of Australia since the 1860s -- which is why support for global events such as the UN's World Day to Combat Drought and Deserti cation, held on 17 June 2013, with the theme "Don't Let Our Future Dry Up" is so important to educate and inform the Australian population that water is our most precious resource. However, as our population continues to grow at one of the fastest rates in the OECD, we need to ask the question -- has Australia done enough to prevent our future drying up? During the recent 'dry' both State and Federal Governments introduced a number of initiatives -- with desalination and water re-use among the more controversial -- to protect Australia's future water resources and strengthen the National Drought Policy, originally implemented in 1992. According to the National Centre of Excellence in Desalination (NCEDA), desalinated water plays and will continue to play a vital role in securing Australia's long-term water requirements. "Australia's needs for clean drinking water continue to grow ... In the absence of other sustainable water sources, seawater desalinisation and potable water reuse ... are the two best options for the future." Meanwhile, a research paper published by the University of Wollongong shows that while most Australians perceive desalinated water to be less risky from a public health perspective, reused water is considered to be more environmentally friendly. NCEDA, however, reports that "desalination can alleviate over-reliance on fragile aquifers and waterways and doesn't impact on forest river and wetland ecosystems". It also argues that well-designed and managed desalination plants have a negligible effect on the environment. This public view also does not take into consideration the negligible use of chemicals to produce desalinated drinking water compared to that required to produce drinking water from recycled water. Plants such as Degrémont Australia's Perth Seawater Desalination Plant at Kwinana, south of Perth, provides more than 45 billion litres of drinking water -- about 17 per cent of Perth's needs -- each year. In fact, the residents of Perth are among six million Australians that can access, when required, clean drinking water from Degrémont Australia-designed, built and operated desalination plants. The company and its partner Thiess recently completed the Victorian Desalination Plant, capable of producing 450,000m3 of drinking water every Odour control system at Brightwater WWTP.
Water Journal May 2013
Water Journal August 2013