The energy-saving potential of wastewater treatment plants is often underestimated. Using efficient blower technology in the biological treatment stage to aerate the wastewater can pay for itself after 12 months.
Energy-efficient blower technology for wastewater treatment plant
Wastewater treatment plants have a high energy demand: 60-80% of the electrical energy consumed is used for ventilation of the aeration tank.
Switching to state-of-the-art blower technologies using the highest possible energy efficiency as well as smart, demand-oriented control and regulation technology offers great opportunities to reduce the total cost of ownership.
By investing in resource-saving technology, wastewater treatment plant operators are also making an active contribution to greater environmental protection and a significant reduction in CO2 emissions.
High savings, short payback times
Energy consumption is the main cost factor
Many wastewater treatment plant operators still focus primarily on the acquisition costs of the blowers. But the purchase price accounts for only five per cent of the total operating costs. The costs for energy, service and maintenance are much more important. Above all, it is worthwhile to look at energy consumption, because at 90 %, this is the main cost factor.
Application-specific ROI calculations
Using application-specific ROI calculations, AERZEN can illustrate the cost benefits of using highly efficient blower technology and the short payback periods that can be achieved.
Potential savings illustration
For example, changing from a conventional Delta Blower GM 35S positive displacement blower with a motor rating of 55 kW to an innovative Delta Hybrid D 30S rotary lobe compressor with a motor rating of 37 kW, can save circa 25 % (volume flow: 24 m3/min, differential pressure: 800 mbar).
At an electricity price of 0.30 euros/kWh, the investment pays for itself after just one year.
Delta Hybrid rotary lobe compressor
Technology concept Performance3: handle load changes precisely
AERZEN has been supporting operators of wastewater treatment plants with customised solutions for over 150 years.
The efficiency concept Performance³, provides a strategy to control load changes precisely and thus to provide an optimal solution for an energy-efficient oxygen supply.
Here, the Delta Blower positive displacement blowers, the Delta Hybrid Rotary lobe compressor and the AERZEN Turbo blowers are used in combination or as individual solutions to provide the most efficient aeration solution.
Energy savings of up to 30% are possible with the right choice of technology and system configuration.
Individual ROI calculations
Many wastewater treatment plants tie up resources due to outdated or oversized machine technologies for ventilating the aeration tanks.
An ROI calculation makes the cost advantages of resource-efficient concepts transparent and thus supports wastewater treatment plant operators on their way to more sustainable wastewater treatment.
To find out potential cost savings for your wastewater treatment plant, get in touch with the application specialists at AERZEN or use the online Performance Calculator.
