A TAS Food Process plant had previously installed a traditional DAF system. Traditional DAF (Dissolved Air Flotation) pumping systems have so many moving parts. The components include an air compressor, pressure vessel, centrifugal pump and of course the controller to get all three components to work harmoniously.
The Problem
The disadvantages of such a complicated system are many. For one, the pressure vessel requires regular certification and records must be kept. The controller needs monitoring. The maintenance time and costs for the many components can be costly.
When one of the largest Chicken processors in Australia wanted to eliminate these complications, and install a more reliable system that requires no controls and is set and forget, they approached Hydro Innovations. The technical staff at Hydro have a combined 80 years of experience in the pump industry. The knowledge of the team is second to none.
The Solution
After consultation, an EDUR LBU 404 C120L with 5.5kW motor was installed. The EDUR multi-phase pump produces consistent fine micro bubbles perfect for the operation of a DAF tank. The EDUR pump has the unique ability to draw atmospheric air into the suction line, shear it, mix it with the water being drawn from the “clean” end of the DAF tank, and saturate the air into the water [by pressurising it].
The Results
The EDUR pump eliminates the need for a compressor, control system, conventional pump, air saturation vessel (and ongoing certifications). The pressure vessel can be removed or bypassed, or they can be incorporated it into the new system.
Because of the simplicity of the system, operators will see an improvement in energy consumption [because they are not running compressors] and a vast improvement in maintenance costs. There is no pressure vessel to continually certify, no compressor to maintain, and no more complicated control system to operate. Just “set and forget”.
With the pump running at 10m3 per hour and circulating approximately 10% of the inflow to the DAF tank, the plant has been running free of maintenance and interference for over 4 years.
More information on sewage pumps in Australia can be obtained by contacting Hydro Innovations on 02 9898 1800 or by email on info@hydroinnovations.com.au
The Pumps
EDUR is a leading German pump manufacturing company, specialising in high-quality industrial centrifugal pumps. EDUR produces pumps for industries such as the food process industry and the municipal industry. Their pumps are customised to suit a range of applications including hot and cold water pumping, wastewater, LPG pumping, dissolved air flotation (DAF) and refrigerant pumping.