KleenScreen Effluent Screen
Effluent KleenScreen
Self Cleaning Intake Screen for filtration of particles likely to
cause system blockages in modern, sprinkler-based, effluent
application systems.
As dairy effluent systems develop to better utilise nutrients and reduce environmental impact they
are tending to be designed to apply much smaller amounts at greatly reduced application rates. A
consequence of this is the use of relatively small nozzles to apply the effluent. These nozzles have
a tendency to block when they are supplied direct from a dirty source such as an effluent pond,
causing poor system performance and frustration for the user.
Standard filtration systems are either ineffective or very expensive to install.
The KSE has been developed to greatly reduce this problem and decrease system maintenance. It
effectively stops potentially troublesome particles from entering the effluent system.
The KSE uses a pair of internal backwashing jets that rotate to continuously blast the screen and
nearby area to break up or wash particles off and away from the screen.
All screens use wedgewire with wire spacing 1.5mm, 2.0mm or 3.0mm.
Benefits
Energy Saving
Although a large proportion of pumped fluid is directed back to the backwashing system, the small screen hole size allows the use of
conventional closed impeller pumps. This allows smaller motors to be used and higher heads to be pumped than standard open impeller and trash pumps, thereby reducing power consumption.
Repairs and Maintenance
The small screen holes (1.5mm, 2.0mm or 3.0mm) filter
effluent entering the system. This will reduce
the amount of system blockages.
Labour Saving
By reducing major causes of sprinkler based
effluent system problems, i.e. blockage, the
labour required to maintain the system is
reduced significantly.
Durable
Stainless steel and thermoplastic components ensure rugged construction and long operational life.
Features
Designed and manufactured for New Zealand and Australian conditions.
No electrolysis
All materials are stainless steel or plastic, which prevents a corrosive situation with dissimilar metals. A
gasket and bolt bushes may be used to ensure that there is no contact with the intake pipe/pump.
Standard Connection
The connection flange is slotted to accept 80 to 100mm AS2129 Table E flanges.
Installation Notes:
- The KSE is best suited to siting in a second oxidation pond, or at least on the side opposite the pond
inlet in a first pond.
-
The KSE is not recommended for sumps with relatively small volumes or situations with large amounts
of fibrous material.
- The backwash line should be plumbed into the discharge of the pump before any valve.
- The recommended pressure range for backwashing is 40-60 m (60 – 90 psi).
- As the screen holes are much smaller than the backwashing jets, an inline filter is not required on the
backwash line.
The KSE is designed for pumping effluent that has been pre-treated by a solids separator or at least a primary oxidation pond. The mesh on the outside of the screen is sized so that anything that passes through it will continue through the pump and also through the sprinkler system without causing blockage. With the increase in awareness of nutrient applications sprinkler systems are growing in favour due to their relatively low application rates in comparison to alternative systems like rotary boom applicators.
These sprinkler systems typically have nozzles that are 10mm or smaller in
diameter. The screen on the KSE is available with either a 3.0mm, 2.0mm or 1.5mm gap between wires, this allows the KSE to be configured to suit various system nozzle sizes.
The KSE works by having some of the pumped flow diverted back to the intake screen where it is squirted out through a pair of fan nozzles. These fan nozzles rotate around the inside of the KSE to effectively wash off any accumulated debris. The nozzles have a flow rate that also causes a stirring action in the vicinity of the KSE, this can also break down particles to a size that can pass through the mesh.
The KSE is manufactured from stainless steel for resistance to the corrosive environment that they are designed to operate in.
The bearing that allows the nozzles to rotate is thermoplastic with tungsten carbide wearing surfaces for abrasion resistance.
The KSE is also built strong enough so that it will not collapse if it inadvertently ends up sitting on the bottom of a pond, supporting the weight of a pump above it.
The KSE is rated to a pumping flow of 20L/s and it uses 3.5L/s for its backwash at 500kPa. The connection flange is slotted to fit both 80 and 100mm table D & E flanges. The backwash is a 1” male BSP that should increase immediately in size, it is only 1” so that it doesn’t obstruct the pump suction too much.
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