Saving Energy for Wastewater Companies
Wastewater sites have a range of applications that can benefit from energy savings and carbon footprint reduction through inverter control.
Archimedean Screws
These are often found on the inlet or used for returning the RAS to the inlet. They are often large powers and expensive to repair. Inverters can offer:
- Up to 15% energy savings
- Reduced revolutions leading to longer screw life
- Reduced lifetime costs
- Smoother flows (less on/off control)
- Smooth starts reducing stress on V belts and gearboxes
You can read a case study about inverter technology on Archimedean Screws here.
Aeration
Sewage works often need aeration whether it be from surface aerators or blowers. These can be the site’s biggest electrical cost. Controlling the DO levels ensure an efficient works. Inverters offer:
- Accurate DO control
- Energy saving
Centrifugal Pumping
Centrifugal pumps are used in many and various applications in sewage works and pumping stations. They can be used for recirculation, RAS flow control, SAS pumping, storm pumping, sand filter pumping, washwater pumping and probably many others. If you can control the speeds and pump for longer you can save energy based on the well-known ‘Cube Law’. Inverters offer:
- Potentially large energy savings
- Controlled flow rates or pressures
- Smoother flows
- Reduced pipework stresses
Sludge Pumping
Sludge is pumped from the bottom of PSTs, Humus Tanks and clarifiers. These are often on simple on-off timer control. This means that there will be times when water is pumped and not sludge. IDS and EMS offer APS (Automatic Pumping System) which uses inverter calculated torque to avoid pumping water. The benefits are:
- Significantly shorter pumping times
- Reduced volume of pumped sludge
- Less manual dewatering
- Reduced tanker journeys
- Controlled and improved sludge quality
A detailed account of the IDS innovative RPC is available on our website here.
Working with IDS
At IDS we specify, supply, install, commission, service, repair and hire ABB variable speed drives. We work with the wastewater industry, supporting each customer with our 24/7 breakdown cover, we carry a huge stock of drives and have them ready to fit should one of yours go wrong. We also have a large range of hire drives, run a preventative maintenance service and are on hand 24/7 for technical advice and support. To see how we can help you, call us on 0115 944 1036 or email sales@inverterdrivesystems.com
Find more Solutions by Inverter Drive Systems here.
