Projects

Andersson Water Stair Screen conveying 100kg Swede. Its transmission is on the downstream side in screened water. Stair Screen can handle bigger objects than any other wwtp screen, without risk of blocking rakes, clogging perforations or tangling pulling screws. Stair Screen is selfcleaning by its on movement and handles wet wipe rags, wet strength tissue fibres and grease. No coarse prescreening stage is needed upstreams in front of 1-3mm Stair Screens. 80% capture can be achieved in one stage. No spraying, No brushing, No raking, No clogging, No chains….

Stair screens side by side replacing other step screens in high flow 4380l/s channel

Stair screen replacing other step screen in high velocity channel

Sweden Ludvika Gonäs WWTP 2mm PSS replacing traditional 3mm step screen

Sweden Lomma Borgeby WWTP 2mm PSS replacing traditional 3mm step screen

Iceland Reykjavik Klettagardar WWTP 5x 2mm PSS for 1400l/s each replacing traditional 3mm step screens

Norway Vestre Toten Kapp WWTP 2mm PSS replacing traditional 3mm step screen

Norway Bergen Knappen WWTP 2mm PSS replacing traditional 3mm step screen

Andersson Stair Screen moving bar step fine screen explained. Still since 30 years the only 1-6mm fine screen that fits any existing coarse screen channel hydraulics with up to 1m/s channel velocity. Automatic bottom seal flap. No weak sharp pointed bar ends needed to actuate the flap. Massive fully side supported bars in stainless steel block guided low friction bottom step. No weak grit catching plastic spacers in the bottom grit subjected zone.

Stair Screen 3mm as Septic Sludge Receiver SSR takes a beating from 2 by 4 wood. 1-6mm Stair Screens does NOT require any 20-30mm coarse pre screening. By using Stair Screens a whole screening stage can be saved compared to perforated screens or other fine screens!

Screenings mat discharge into conveyor. No scrapers, No brushing, No flushing. Intermittent step by step level control enables screenings mat precoat and high separation. This cannot be achieved by traditional rake or perforated screens. Stair Screen screen surface (the moving bar set) consists only one moving part. No hinges, No seals, No chains.

Stair Screen ASS 3mm as Septic Sludge Receiver SSR handling 1.5-3m3/min 25-50l/s of >2-4% ds concentrated import sludge septic and stored from surrounding plants and sludge separators. Spraying only to pre wash screenings

Stair Screen ASS 3mm as Septic Sludge Receiver SSR handling >2-4% ds concentrated import sludge septic and stored from surrounding plants and sludge separators. Spraying only to pre wash screenings

Wash Press Compactor WPC strong brushed fully perforated thick plated inlet perfo bottom gives high grit, wash, press, drain capabilities. S355J steel screws is much stronger against wear than stainless