Working predominantly in the construction industry, Water treatment solutions are an integral part of business for Glen Creswick.
On any day Coates Hire’s National Technical Manager — Water Management Glen Creswick and his colleagues meet with clients at building project sites across the country, advising on how to manage groundwater issues, handle site runoff or effectively treat contaminated discharges.
“Recently a local council was working at a site that was once an old brick pit. It had been turned into a rubbish tip but the council was refurbishing the site to make it into a public park and wetlands area,” he says.
“There were high levels of groundwater contamination so we specified one of our Wetsep systems to treat any groundwater that leaked into the site. We treated it and discharged it from the site so work could continue. The alternative was to continuously truck the water off-site — which would have cost millions of dollars.
“It was a challenging project but a rewarding one, as a highly contaminated site has been transformed into a wetlands park to be enjoyed by the local community.”
Wetsep units are a recent addition to Coates Hire’s water treatment armoury and are used for the treatment of runoff and wastewater from construction work.
“They automatically control the acidity or alkalinity of the water and add flocculants and coagulants to separate the suspended solids in the sludge so the water discharged from the units meets all the discharge requirements,” Creswick says.
Coates Hire also has units specifically designed for managing acid sulphate groundwater. The units come in various sizes, ranging from a mini tank to a mega tank that can handle up to 65 litres of water per second. The unit restores water to a neutral pH so it can be discharged safely into the environment.
“All units can be fitted with telemetry and data logging, and can be monitored remotely,” he says.
“There are alarms and thresholds that can be set so people are notified when the unit runs low on treating chemicals.”
Other water treatment options include sediment tanks that collect and remove sand and silt particles and a Siltstopper clarifier which is a low-cost mobile silt and water separation unit suitable for construction, environmental and the mining industries.
“There’s a lot of equipment on the market but we’ve specifically designed our water treatment equipment to withstand the rigours of the hire market, so it’s fully transportable and compact and incorporates the latest technologies and processes,” Creswick concludes.