Lindsay Pivots and Pumps Provide for City’s Wastewater Needs
How do you successfully complete one of the largest wastewater treatment projects of its kind in Australia?
With a full arsenal of Lindsay products, including:
- 13 new poly-lined Zimmatic by Lindsay center pivots
- Nearly 8 miles (13 km) of polyethylene pipes
- A fully-integrated Watertronics pump station, including five 215 horsepower (160 kw) centrifugal pumps (see related story)
- FieldNET pivot and pump control technology
Spearheaded by TEAM Irrigation, Lindsay’s local Zimmatic dealer in Dubbo, NSW, Australia, the recently-completed Tamworth City wastewater reuse project was 14 years in the making and designed to secure the city’s effluent disposal for up to 40 years.
With the city’s population expected to grow to nearly 50,000 by 2020, the Tamworth, Australia, City Council decided to decommission and relocate its two existing wastewater treatment plants to the outskirts of town.
Team Irrigation spearheaded the project, which took approximately 12 months to complete, and allows for a maximum daily effluent discharge of 14.2 million gallons (54 ML).
Now, instead of being dumped into a nearby river, the town’s treated wastewater is pumped through 13 Zimmatic pivots and used to irrigate 1,581 acres (640 ha) of local crops such as grains and alfalfa, which are then sold to local dairies and feedlots.
All Lindsay Products
“We were proud to be involved in the project from conception,” says Craig Chandler, managing director of TEAM Irrigation. “This multi-million-dollar project was unique in that it involved 100 percent Lindsay products, including the pivots, the pipes, the pumps and all of the controls.”
The Zimmatic center pivots, ranging in length from 1,772 feet (540 m) to 778 feet (237 m), are designed to apply .36 inches (9 mm) of water over the fields in a 24 hour period.
Realm Agribusiness served as the principle contractor on the project and manages the irrigation system and farming operation.
“While our dealership has completed projects that irrigated a larger land size, this is by far the biggest project we have been involved in dollar wise and is the first project for us involving full integration of Lindsay Zimmatic pivots, pipes, Watertronics pumps and FieldNET controls,” Chandler says.
“This was definitely a team effort involving many different local partners and several Lindsay divisions and teams working together to design a highly-efficient wastewater disposal system that will provide for the City of Tamworth’s needs well into the future.”
Visit the TEAM Irrigation website to see construction photos.
Watertronics Pumps, FieldNET Key to Tamworth Project
Key to the innovative Tamworth, Australia, wastewater treatment project is a fully-integrated Lindsay Watertronics pump station that is used to move the effluent from holding ponds through the Zimmatic pivots and ultimately onto 1,581 acres (640 ha) of grain and alfalfa crops.
According to John Atkinson, Watertronics agricultural sales manager, the Tamworth pumping station consists of five 215 horsepower (160 kw) centrifugal pumps, each capable of pumping 2,400 gallons (9,085 liters) per minute. The pumps are equipped with variable frequency drives (VFDs) to specifically tune pressure and flow characteristics to each pump, ensuring near perfect pressure regulation.
Electronic butterfly valves are use to complement the VFD controls, regulating the pressure of each pump and providing backup pressure regulation in the event of a VFD failure. A programmable computer on the pump station is used to precisely control the right amount of pressure and water needed to supply the operating pivots.
Before actual installation at Tamworth, the entire Watertronics pumping station was engineered, assembled and “live” tested at full flow and pressure at the Watertronics factory in Hartland,Wisconsin, USA, Atkinson says. This reduced final installation and set-up time in Australia from months to days.
Biggest Project So Far
“This was by far our biggest wastewater project we have been involved in for crop irrigation and in terms of effluent water,” Atkinson says. “It’s great knowing that our technology and products can be used to irrigate crops rather than having the wastewater being dumped into the river.”
The Watertronics pump station and Zimmatic pivots are integrated with Lindsay’s FieldNET wireless management network, which allows for complete monitoring and control of the project, according to Craig Chandler, managing director of TEAM Irrigation, Lindsay’s local Zimmatic dealer in Dubbo, NSW, Australia.
“FieldNET is critical as far as monitoring and controlling all of the system components, including text message alerts. With an effluent project like this, there is no room for accidents and a broken pipe would spell disaster if it was allowed to go unchecked,” Chandler says.