Tim Webster on Edur DAF pumps :
Video Transcript
By using a German built EDUR DAF pump, businesses with wastewater treatment systems can save on capital cost, as well as energy and maintenance costs.
A single “DAF Pump” can replace the entire air bubble system on Dissolved Air Floatation (or “DAF”) plants, according to EDUR pump distributor, Hydro Innovations. Their EDUR® “Multiphase” pumps draw in air through a “snorkel” in the suction line, sheer the air, then feed it into the DAF plant, producing a discharge stream into the tank that is saturated with 30 to 50 micron air bubbles.
A conventional DAF system consists of a wastewater tank, compressor, air saturation vessel, and effluent pump. The effluent pump draws effluent from the tank and pumps it into the air separation vessel. A compressor pumps air into this same vessel. The air/water mixture is “saturated” under pressure, then released back into the wastewater tank at atmospheric pressure where the air comes out of suspension and tiny bubbles form. These then adhere to the suspended matter [fats, oils and other small wastewater particles]. The bubbles, with their attached suspended matter, float to the surface of the tank, where floatables can be skimmed off the surface.
By using EDUR® Multiphase pumps, which can produce their own micro-bubbles, asset owners can do away with the compressor, the air saturation vessel and any control and/ or ancillary components for these items. The reduction of these system components and the simplification of the system design results in lower investment costs and higher operational reliability.
The EDUR® Multiphase [DAF] pump is also an efficient alternative. Energy costs [as well as maintenance costs] of running the compressor are eliminated. There is also no need for constant re-certification of the air saturation vessel, because it is not required in the EDUR system.
EDUR® multiphase pumps can deliver flows from 1 litre per second [for smaller DAF plants] to 15 litres per second [for larger DAF plants] and produce pressures to 12 Bar. A variety of materials and seal arrangements enable EDUR pumps to operate in a very wide range of applications. Available materials include ductile iron, “gunmetal” bronze, stainless steel and super duplex. Mechanical seals available as balanced, double and tandem. For more information on these pumps, Hydro Innovations should be contacted at info@hydroinnovations.com.au or by phone on 0298981800.
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The EDUR PBU multiphase pump is a single-stage peripheral centrifugal pump with the unique capability of being able to pump a liquid/gas mixture. The centrifugal pump is constructed of stainless steel, so may be used to handle a variety of liquids. Air, Oxygen, Carbon Dioxide and Ozone gases can be introduced into the suction line and transported and used to mix or disperse the gases. This makes the pump ideal for DAF plants, where the multiphase pumps provide the task of air saturation without the use of compressed air (no compressor, air saturation tank or associated controls).
Advantages include:
- Liquid flows to 1 l/s
- Gas content up to 15%
- Stainless steel construction
- Completely replace the “old” DAF system with a single pump
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The EDUR LBU multiphase pump is a multi-stage centrifugal pump with the unique capability of being able to pump a liquid/gas mixture. The centrifugal pump is constructed of either C.I./ Bz/ SS, Nodular Cast Iron, All-Bronze, Stainless Steel, or Super-Duplex Stainless Steel construction, so may be used to handle a variety of liquids.
Air, Oxygen, Carbon Dioxide and Ozone gases can be introduced into the suction line and transported and used to mix or disperse the gases. This makes the pump ideal for DAF plants, where the multiphase pumps provide the task of air saturation without the use of compressed air (no compressor, air saturation tank or associated controls).
Advantages include:
- Liquid flows to 16 l/s
- Gas content up to 20%
- Cast iron/Bronze/Stainless steel, Nodular cast Iron, All-Bronze, Stainless Steel, or Super-Duplex Stainless Steel construction
- Completely replace the “old” DAF system with a single pump
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The EDUR Torque-Flow (FUB) range of centrifugal pumps have vortex impellers and are capable of handling spherical solids up to 80mm in diameter. They are close-coupled and available with casings of Cast Iron, Ductile Iron or Gunmetal Bronze, impellers of Ductile Iron, Gunmetal Bronze or Stainless Steel, with Stainless Steel shafts (in 2 grades). Some models are available in all Stainless Steel construction. Abrasion-resistant protective linings of ceramic and polyurethane are also available.
Advantages include:
- Flows to 100 l/s
- Heads to 35m
- Handle solids sizes to 80mm
- Handle temperatures from -40oC to 140oC
- Handle Viscosity to 60cSt
- Handle 15% solids
- A variety of mechanical seals available to suit specific applications
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Designing pumps since 1927, EDUR Pumpenfabrik has developed a range of pumps for use in refrigeration systems. They have been designed to provide a maximum level of safety, reliability and efficiency. They are the safe option because they use standard TEFC motors, which don’t need to be cooled using the pumped media. They are efficient because they use magnetic couplings. By using magnetic couplings energy is not wasted by pumping fluid over the motor [as with “canned motor pumps”] and back through to the separator.
Advantages include:
- Suitable for ammonia, C02, synthetic refrigerants and refrigerants containing hydrocarbons/li>
- No heat transfer from motor to pumped media/li>
- Low maintenance/li>
- Low NPSH values/li>
- Pulsation free operation/li>
- Long service life
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The EDUR range of multi-stage self priming centrifugal pumps can self prime on suction lifts up to 7.5 metres, and deliver heads to 160m. These self priming pumps are also available in a variety of materials (Cast Iron, All Bronze, All Stainless Steel) enabling them to pump corrosive fluids including seawater.
These Grey Water Pumps can be close or long-coupled.
Advantages include:
- Self Priming to 7.5 metres
- All Iron, All Bronze and All Stainless Steel construction
- Flows to 80 l/s
- Heads to 160m
- Handle temperatures from -40oC to 90oC depending on model
- Single and double mechanical seals available
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The EDUR range of Industry Bloc close-coupled centrifugal pumps are ideal for pumping water and other clean and slightly polluted fluids. They are compact in size, and available in a variety of materials of construction including cast iron, bronze and stainless steel.
Motors are either 2 pole or 4 pole, with IP55 enclosures, and insulation class F.
Advantages include:
- All Iron, All Bronze and All Stainless Steel construction
- Flows to 165 l/s
- Heads to 90m
- Handle temperatures from -40oC to 140oC depending on model
- Handle viscosity to 115 cSt
- Handle solids content to 15%
- Single and double mechanical seals available
- Surface Mounted Pump
