A long-planned upgrade at Melbourne Water’s Eastern Treatment Plant includes an ozone system with installation beginning in November 2010. with peak flows of around 185 MGD of treated water production, the upgrade to advanced tertiary treatment at Melbourne Water’s Eastern Treatment Plant will make it among the largest of its kind in the world.
After pilot testing program begun in 2008 to narrow down the treatment options, the new treatment regimen incorporates ozone treatment, biological media filtration, ultraviolet and chlorine disinfection. Pretreatment by ozone oxidation allows the UV systems to be two to four times smaller than otherwise required and reduces chlorination needs as well. The ozone system has a peak production capacity of 490 kg/h ozone in total. The generators are fed by oxygen produced on-site from ambient air.
The plant is being built by the Eastern Tertiary Alliance, which includes owner Melbourne Water, construction partners Baulderstone and UGL Infrastructure. and engineering consultants Black & Veatch and KBR. The upgraded plant is expected to be operational by the end of 2012, and construction of the oxygen and ozone system infrastructure has already commenced.
The upgrade is primarily driven by an objective to improve the quality of treated wastewater discharged into the marine environment. The additional benefit of the significant improvement in treated water quality will be the production of high quality recycled water which can be used for a broader range of non-drinking applications.
Malibu’s new 15-acre central park opening Saturday is more than a green space it is also capable of treating about two million gallons of storm water runoff every day. Under the park is a system of pipes and filters that will remove trash, bacteria and metals from runoff water that has long contaminated Malibu Creek, Malibu Lagoon and Surf rider Beach.
The water will flow through a bio-filtering creek to a detention basin where sediment can settle. Next, the water flows to a treatment facility, where it will be filtered and disinfected with ozone. Finally, it will be pumped back to the park and used for irrigation.
The facility will increase Malibu’s ability to treat storm water ensuring compliance with bacteria limits set by the federal government. The city raised $25 million to buy the property in the center of town, then collected $13 million more to build the park.
The City of Santa Barbara is getting a $29 million loan to install an ozone water purifier at the Cater Water Treatment Plant as part of a longstanding effort to comply with increasingly stringent federal standards. Ozone water treatment is designed to remove potential carcinogens in the water created when sunlight interacts with leaves, twigs, and other vegetation.
The International Joint Commission (IJC), a cross-border body responsible for investigating and improving the health of the Great Lakes, wants to introduce ozone hydrogen peroxide treatment Windsor Ontario’s Little River Pollution Control Plant to clean waste water of pharmaceuticals, personal care products and pesticides. Those chemicals are commonly found in waterways close to urban centers and areas with heavy agricultural land use.
Ozone and hydrogen peroxide, when combined create a powerful oxidant called the hydroxyl radical. The overall process is called advanced oxidation. This process has been shown in numerous studies in both the US and Canada to remove a wide range of pollutants including pharmaceuticals, personal care products and pesticides.
The IJC’s Great Lakes Regional office is awaiting approvals to begin testing of advanced oxidation.
Danvers water officials say the water treatment plant, which sits on Middleton Pond in Middleton, must be upgraded to meet a set of new regulations that will take effect in 2015.The $20 million water treatment plant project, which they hope will start in of May 2011 and finish in June 2013, will include the addition of new treatment processes and the construction of new structures at the Lake Street plant.
Major project components include the construction of an ozone building with a new ozone disinfection system, additional sand and carbon filter systems, a residuals handling system, and upgrades to the existing plant, which provides drinking water to Danvers and most Middleton residents. A 95 percent design of the project was completed this past July.
The town of Danvers has secured a low interest loan for $6 million of the $20.65 million project and is in the process of requesting additional funding opportunities from the state. Middleton and Danvers water customers will pay the construction costs through an increase in their water rates.