Technology Overview
Untreated sewage first passes through a screw screen, which effectively removes larger floating and suspended materials, known as screenings. The screened sewage then flows into a longitudinal sedimentation tank where sand and other heavy particles, referred to as grit, settle out and are removed by a system of screws.
A horizontal shaftless grit conveying screw transports settled grit to the sump. Grit is then removed from the sump via a shafted extraction screw which lifts the grit from the tank for discharge into a bin. Additionally, the system can be configured to remove fats, oils, and grease (FOG), offering enhanced treatment where required.
Key Features
- Small footprint & minimal civil works
- Ease of installation and operation
- Low operating costs and maintenance
- Low organic matter in the solid residue extracted
- Reduction up to 40% in volume of solids removed
- No odours
Technical Specifications
Standard Specifications
*1Theoretical, calculated using clean water; reference design basis: influent TSS 500 mg/L with up to 0.5% grit; typical performance: up to 90% removal efficiency for grit particles >200 μm and density > 1,650 kg/m3, *2Flanges are lap joint max 15mm thick with holes P16 according to AS4087, *3Refer to MAK Water product data sheet SSB-mK for more details, *4 Refer to schematic, *5 Based on machine configuration, motor power could be different
Standard Inclusions and Options
*1Standard air blower system includes: motor TEFC premium efficiency IP55 with thermistor, 1” fittings with SS hoses, retention valve, pressure valve, pressure switch, suction filter, wiring & full installation, outdoors side installation, no additional protective covering, *2 Lap joint flange with holes PN16 according to AS4087 *3Stainless steel parts: stripping with acid solution, passivation with glass particles, final surfaces cleaning with anti-dust oil. Carbon steel parts: sandblasting SA 2.5 for external anti-rust paint RAL 5015
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Screening