Spiral Sieve - Fine-screening of waste-water
The robust Spiral Sieves screens are ideally suited for smaller and middle-sized inlet or headworks applications. The Spiral Sieves offer remarkable operational advantages:
Fine screening of wastewater has become a standard operation in both small and medium sewage treatment plants. The spiral sieve screens are very suited to these applications and have also proved their worth in the screening of faecal matter, sludge and also scum. Through fine screening of non-degradable floating matter wastewater treatment processes are improved.
Applications
Municipal
• Pre-treatment
• Primary treatment in lieu of sedimentation
• Sludge screening - waste activated
• Scum screening
• Ocean outfall
• Stormwater management (CSO & SSO)
• Pulp and Paper industry
• Wood room effluent
• Chip pile run-off water
• Pressure screen rejects
• U-Drains
• Mill effluent (coarse)
• Mill effluent (line)
Industrial
• Fast food processing - all process effluent
• Winery - all process effluent
• Seafood and fish processing - total plant effluent, process water
• Meat processing / abattoirs - all process effluent
• Sugar / mill refining - all process effluent
• Machining - all process effluent
• Oil recycling - all process effluent
• Fruit and vegetable processing - all process effluent, process water recycle
• Citrus processing - all process effluent
• Petrochemical - all process effluent, PVC bead recovery
• Rendering - all process effluent, truck drainage
• Textile - all process effluent
Operating Principle
The spiral sieve screen is installed into the inlet flow channel. Flows are allowed to pass through the submerged perforated plate of the screen. The perforated plate is available in varying dimensions. Debris retained against the surface of the perforated screen are removed by the inclined screw mechanism, which conveys the solid up through the screen.
During the conveyance, screenings can be washed and compacted to produce a reasonably dry and clean discharge
Advantages
• Fine screening, washing, transporting, compacting and dewatering in a single unit.
• Simple retrofit, space-efficient.
• Hygienic enclosed casing consisting wholly of high-grade steel.
• Clogging and pigtailing is prevented by the shaftless, thick-walled spiral.
• Screening gaps of 1 to 6 mm.
• Direct fine-screening into the drain or optionally into a container.
• Indoor or outdoor installation
• Re-adjustable sieve basket