Water / Wastewater Treatment Australia’s Largest Municipal Ozone Plant Supplied with Four WEDECO Systems
A long-planned upgrade at Melbourne Water’s Eastern Treatment Plant includes a new WEDECO ozone system from ITT Corporation with installation beginning in November 2010. At average and peak flows of around 380,000 and 700,000 cubic meters per day of treated water production, the $380 million (€270.1 million) upgrade to advanced tertiary treatment at Melbourne Water’s
Eastern Treatment Plant (ETP) will make it among the largest of its kind in the world. After an extensive pilot testing program begun in 2008 to narrow down the treatment options, the new treatment regimen incorporates ozone treatment, biological media filtration (BMF), and ultraviolet
and chlorine disinfection. ITT is providing the ozone technology consisting of four WEDECO PDO 7500 ozone systems with a peak design production capacity of 490 kg/h ozone in total. The generators are fed by oxygen produced onsite from ambient air. ITT’s scope of supply further includes the oxygen generation system, ozone injectors, a variety of monitors, analysers and other instrumentation, and residual ozone destructors. A participant in the trial program, ITT was awarded the $16 million (€11.6 million) oxygen/ozone contracts in July. The ETP, which treats about 40% of Melbourne’s sewage or around 330 MLD (with wet weather flows up to 1,750 MLD), also incorporates Flygt pumps from ITT.
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 pilot testing identified the preferred treatment train comprising ozone, BMF, ozone, UV and chlorine, requiring two ozone injection points. 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. Other ozone equipment is under manufacture now in Germany, with installation of the main ozone systems anticipated to begin in mid-2011.
ITT sales engineer Florian Axt noted the ozone project holds the double distinction of being the biggest in wastewater and biggest in Australia for the WEDECO brand. “The ozone system also is among the largest capacity ozone systems worldwide” he added.
Currently treated to "Class C" recycled water quality, some of the ETP treated effluent is recycled with the remainder discharged to the ocean via a near-shore outfall at Boags Rocks on the Southern
Mornington Peninsula. 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 than the current recycled water quality.
"This effluent is going to the sea in a location close to popular swimming and surfing beaches," said Louis Wiart, national industry manager for ITT’s Water and Wastewater business in Australia. "Melbourne
Water has been monitoring the receiving marine environment for many years and identified a need to reduce the impacts of the discharge on the environment in line with community expectations around environmental performance. Rather than extend the existing nearshore outfall a further 2-km offshore, Melbourne Water decided to go for better treatment and improved treated water quality to address the impacts. Obtaining a very good quality effluent in the future allows it to recycle this effluent for a broad range of applications." Wiart added that pretreatment by ozone oxidation allows the UV systems to be two to four times smaller than otherwise required and reduces chlorination needs as well.
Dr. Tim Puehmeier, ITT product and application manager for ozone, said the ETP upgrade project breaks ground that’s expected to lead to additional work in wastewater for the entire Asia Pacific region. "It’s a great project for us. It’s a nice success story being from a pilot to a final project – that also happens to be our biggest Australian job. That’s just fabulous," he said.
Reader Reply Card No 36
Filtration System Installed at UK’s Largest Sewage Treatment Works
Thames Water’s Sewage Treatment Works in Beckton, East London is the biggest in the UK and one of the largest in Europe, serving 3.4 million people throughout London. The Works, which is undergoing a major expansion programme, features the latest sludge treatment technology, including a sludge powered generator for energy efficient waste disposal.
The sewage treatment process features eight large screens that can operate continually to remove screenings from the sewage. Following primary and secondary treatment,
washwater is fed into the screens via a series of nozzles to wash the sludge off and clean the screens and brushes. In order to prevent the washwater nozzles from blocking and disrupting the screenings separation process, a Bollfilter (UK) automatic filtration system has been installed in the Beckton Screen House.
The system which comprises two Boll 6.19 automatic self-cleaning Filters and CCD pumps is mounted on one skid for ease of installation. The 6.19 filters, which operate under low pressure conditions, are fitted to the washwater inlet feed prior to the pumps, with the added benefit of protecting these from possible particulate damage. A small amount of the pressurised washwater is fed back into the filters for efficient cleaning without the need for separate backflush pumps, creating a low energy, space efficient filter/pump solution.
The Beckton filter skid is the second similar installation fitted by Laing O’Rourke for Thames Water. Kevin Woolley, Laing O’Rourke’s Construction Manager explains the choice of the Boll 6.19 low pressure system. “We have found Boll filters to be very good. We installed a similar installation at the Thames
Water’s Deephams STW, following problems with two previous filter systems. The Boll filters have worked well ever since.” Reader Reply Card No 37
New Variable Speed Controller
Membrane Reactor Modules for French Wastewater Plant The Koch Membrane Systems (USA) has been selected by OTV France SNC (Veolia Group) to provide PURON®
membrane bioreactor
modules for the wastewater treatment plant at “Carré de Reunion” in the Versailles region, France. The project will upgrade and expand the capacity of the existing conventional wastewater treatment plant.
The plant is located adjacent to the gardens of the Palace of Versailles and is owned by “Le Syndicat Mixte d’Assainissement de la Région Ouest de Versailles” (SMAROV). The treated wastewater will be discharged into the small “Ru de Gally” stream, a side arm of the river Seine which has its source in the palace gardens.
The plant is designed for an annual average flow of 43,500 m3 /d, with peaks up to 6.000 m³/hour. The upgrade of the existing
conventional wastewater treatment plant with MBR technology will allow to achieve effluent quality requirements to meet future legal requirements of the European Community.
The C100A from Fluid Metering (USA) features both manual speed adjustment using a front panel mounted rotary dial, as well as electronic speed control via a 4-20mA signal from an external source (sensor, flow meter, analyser, process controller.. etc).
The C100A features include IR compensation, current limiting
circuit, minimum and maximum speed adjustment, which are all factory preset to best meet specific application parameters. It also incorporates transient voltage protection and an AC fuse.
The C100A is ideal for controlling FMI’s patented Chloritrol®
Valveless Hypochlorite Injection System and FMI’s CTS Chemical Treatment System, both of which provide maintenance-free fluid control in the water and wastewater treatment industries. It is especially well suited for these applications which are typically 24/7/365 operations in remote locations. The C100A will retain settings and resume operation following a power interruption or failure without the need for manual restart by an operator.
This versatile unit is also an economical control for FMI’s “QV” and “RHV” Series variable speed process and laboratory pumps.
Reader Reply Card No 39 Removing Nitrogen with Novel Biotechnology Applications
After the successful implementation and start-up of the first three full-scale applications of Biotechnology from Lentikat (Czech Republic) for removal of nitrogen from various types of municipal and industrial wastewater, this novel technology is now helping to achieve strict nitrogen discharge limits in yet another industrial plant. A simple and compact solution for the removal of residual nitrates was easily fitted within the existing physical-chemical treatment process applied to the effluent from a steel tool manufacturing plant and has subsequently brought the plant into compliance with their environmental discharge consent.
A parallel laboratory based research project has further confirmed the high denitrification efficiency rate of Lentikat Biocatalyst to deal with the removal of nitrates from coal power plant effluents, typically characterised by extremely high salinity and presence of other inhibitory compounds.
Once again the lentil-shaped Biocatalysts have proven themselves able to succeed where more conventional technologies have
failed. Following the recent success in the local Czech market LentiKat’s a.s. is now joining forces with a number of renowned companies around the world, introducing their wastewater solutions in the US, Brazil, Australia and China.
Reader Reply Card No 40
The delivery of the PURON membrane modules is scheduled for end of 2012/early 2013; the start-up will be in 2013. The treatment plant will be Koch Membrane Systems’ largest MBR project in Europe. The demand for PURON MBR technology in France continuous to increase steadily with thirteen orders and start-ups in the last twelve months for large-scale municipal projects, some of them with a capacity of more than 20,000 m3
/d. Reader Reply Card No 38
www.pollutionsolutions-online.com • Annual Buyers’ Guide 2011
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