Water Journal : Water Journal April 2015
WATER BUSINESS water APRIL 2015 148 water Business MONADELPHOUS WATER INFRASTRUCTURE EXPANDS IN AUSTRALIA AND NEW ZEALAND Leading Australian engineering company Monadelphous has expanded its water infrastructure capability with the acquisition of Water Infrastructure Group. Monadelphous General Manager – Infrastructure, David Mutch, said that the acquisition was an important part of the growth strategy for Monadelphous. “We see this as an exciting opportunity to extend our water services to more customers with our expanded presence throughout Australia and New Zealand. The services include specialist expertise and products for the growing water and wastewater sectors. Our existing customers will also benefit from WI Group’s award-winning water design solutions and technology,” David said. Monadelphous Senior Manager Growth and Strategy, Peter Everist, said that moving forward existing municipal, utility and private sector customers will benefit from Monadelphous’s industry-leading project management and construction services for large-scale infrastructure projects. “Monadelphous has an enviable track record for safety, sustainability and research and development in delivering complex infrastructure projects. This is a win-win from every perspective and I’m very excited about the opportunities we have to deliver outstanding water infrastructure solutions for our clients, the community and the environment.” For more information please visit www.monadelphous.com.au WEARS DELIVERS BEST-PRACTICE SOLUTION After 20 years of providing water circulation solutions for large water reservoirs, WEARS recognised that current disinfection methods fail to effectively provide consistency in water quality and set about developing a new purpose-designed service reservoir system. The Resmix VitalTM is a revolutionary water quality maintenance and monitoring system designed to achieve standard levels of disinfection throughout municipal water storage reservoirs. Following extensive testing in the UK the product has now been launched and installed in reservoirs in the UK, Middle East, the US and Australia. The Resmix VitalTM floats on the water’s surface, using a proprietary impeller system to move 75 litres per second downwards with minimal energy usage. The automated chlorination system continuously monitors water quality and adds a calculated amount of disinfectant. This system eliminates water stratification, temperature variation and dead zones inside the reservoir, allowing the disinfectant to reach the entire volume of stored water, and provides the user telemetric data collection allowing for accurate and compliant reporting. WEARS’ Managing Director, Stephen Elliot, said water is essential for our community and it’s what has driven WEARS to research and create the Resmix VitalTM . “The Resmix VitalTM is recognised as a cutting edge, best-practice solution for service reservoirs, Stephen said. “We set out to deliver the first ‘off-the-shelf’ system that can be installed and operational within hours, is energy efficient, low maintenance and with a 20-year plus operational lifespan.” Initial product testing carried out in the UK by e3k was to conduct a Computational Fluid Dynamics (CFD) analysis of the system. A number of simulations were created and testing concluded that the Resmix VitalTM can reduce the impact of chlorine residual reductions by as much as 45%, eliminate stratification and reduce surface temperature, remove dead zones in the reservoir and minimise floor sedimentation and biological build-up on internal surface. David Swan, from Swan Environmental Project Management, evaluated the initial system testing results from the UK and said in comparing the water that was mixed, and comparing the chlorine residuals in the mixed tank compared to the unmixed tank at the same time, there was an increase in chlorine residual of between 10% and 45%. “This is particularly relevant where the clear water pumps at the WTP pumps directly into the reticulation; those living on these rising mains sometimes suffer from high chlorine levels. If the desired chlorine level is, say, 0.5PPM at the service reservoirs, and this level can be achieved by mixing and dosing at the service reservoir, then the dosing level at the WTP can be reduced from, say, 0.7PPM also to 0.5PPM for example, a further reduction in chlorination costs and a safer water supply will result,” he said. Service reservoirs are the last point for monitoring, dosing and mixing disinfectant levels before the water goes to tap. If proposed revisions to have a uniform disinfectant level at tap are legislated as part of the Australia Drinking Water Management Plan, then the service reservoir is where this needs to take place. The system allows chlorine consumption to be reduced but Monadelphous Water Infrastructure – delivering multidisciplinary engineering services to Australian and New Zealand markets. PERTH | ADELAIDE | SYDNEY | BRISBANE AUCKLAND | CHRISTCHURCH TOGETHER WE DELIVER. www.monadelphous.com.au Visit us at OZWATER stand F03 A WI Group facility in Maleny, Queensland. Reservoir mixing for South West Water (UK)* * The Total Viable Count (TVC) gives a quantitative idea about the presence of microorganisms such as bacteria, yeast and mould in a sample. The TVC counts for the mixed tank shows a significant reduction in the presence of microorganisms compared with the unmixed tank, which indicates that the residual chlorine is able to be used more effectively as a result of the mixing – Tank 1 with the Resmix VitalTM installed and Tank 2 without; these tanks are interconnected with the same treated inflow and connected on the outflow. Tank 2 was treated as the control and was not mixed.
Water Journal February 2015
Water and CSG