SuperSand
SuperSand is a world-leading continuous sand filter developed by the Axel Johnson Institute in Sweden in the late 1970s. SuperSand is used to clean and produce water for drinking, industrial processes, waste water recycling and waste water treatment before the water is discharged into a recipient. With thousands of filters installed worldwide for municipal and industrial use, we have the experience and equipment necessary to exceed your expectations.
Product information
Continuous improvement
The range of SuperSand filters is under constant development and includes the latest developments of sand filters, such as material that is extremely resistant to the abrasions caused by sand that is in constant motion during normal operation. The advanced materials mean less maintenance and prolong equipment life. Additionally, you can optimise the sand cleaning rate (the sand/water ratio) with the help of two adjustable weirs with a specially designed wash box, which minimises losses when backwashing.
Uninterrupted operation
Uninterrupted operation provides several benefits over conventional backwashing sand filters. In conventional sand filters particles are collected in the sand bed with increasing pressure drop as a result, until finally the sand must be cleaned by backwashing before treatment can proceed. The time between backwashes can be very short, which reduces the effective operating time. It was not until the continuous sand filter technology of SuperSand was developed that it was possible to get an optimal solution to the need for continuous water and waste water treatment process while delivering a constant quality of the filtrate even at a high surface load.
Strengths
SuperSand improves the process
no first filtrate – always high-quality clean filtrate
simple treatment of wash water, no shock loads
handles high levels of suspended particles without requiring pre-treatment
low pressure drop
low energy consumption
low monitoring and maintenance costs
no need to stop for backwashing
small footprint
SuperSand simplifies the system
no need for backwashing pumps
no tank for rinsing water
no collection tanks for rinsing water
no need of automatic valves for backwashing
no blowers for purge air
no nozzles with risk of clogging the filters
only one filter medium
system is simple to construct and maintain
simple expansion for biological treatment
Examples of industrial applications
metalworking
wash water recycling
process water
side stream filtration of cooling water
scale residues
chemical processes
ideal as pre-treatment instead of gravity filters
This is how SuperSand works
The incoming water is led down to the inlet manifold in the filter bottom. Suspended solids are filtered out when the water flows upwards through the filter bed. The filtered water is directed to the drain conduit via the weir in the upper part of the filter. Using compressed air an airlift pump in the centre of the filter draws up sand from the bottom into the sand wash where the particles are separated from the sand. The sand bed moves down continuously. A small portion of the filtrate passes through the sand washer and is used to wash the sand before being discharged as wash water. The clean sand falls onto the filter bed and is re-used. The respective filter is started and adjusted via the pneumatics cabinet supplied with the installation.
Two variants – one method
No matter how big or small your facility, we can adapt SuperSand to your circumstances. Smaller plants typically use standalone SuperSand filters while concrete installations are often used at larger works.
Standalone filter
If you select a standalone SuperSand filter you get a device consisting of a cylindrical tank with a conical bottom and internal filter elements. The filter has flanged connections for inlet, filtrate and wash water. The filter system can consist of one or more filters depending on the desired capacity. If you select multiple filters they are connected to the pipework that distributes the incoming water and drains off filtrate and washing water.
Concrete installation
If you want a facility with high capacity it usually takes the form of filter modules mounted in concrete tanks. The filter cells (each consisting of several filter modules) contain bottom cones in stainless steel or FRP and internal filter sections and have a common sand bed. Your facility can be designed for a virtually unlimited filter area allowing SuperSand to be used in both small and large facilities with very different capacities.
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