Bluewater Bio FilterClear Ove vervie rview w Bw BwB: : Filt - PowerPoint PPT Presentation

Bluewater Bio FilterClear Ove vervie rview w

Bw BwB: : Filt lter erClea Clear™ ™ 32 32

14 Filt lter erClea Clear: A Adv dvant ntage ges 33 Com ompared to: to: Continuous backwash filters • Deep bed filters • Other multimedia filters • Key ad advan vantages o of Filter erCl Clear ear ar are: Up to four media of differing particle size & density • – reduces blinding of upper layers Two fine ‘surfaces’ giving improved filtration • One +ve charged surface adsorbs organics • Naturally occurring materials (think Volvic) … • engineered for: • greater voidage – increased holding capacity – higher loading rates – better filtration performance – 33

14 Filt lter erClea Clear: F Four m media ia 34 Silica, mode = 0.70 mm Anthracite, mode = 1.4 mm Magnetite, mode = 0.35 mm Alumina, mode = 0.60 mm 34 Photographs taken by Philani Ncube/Pete Jarvis, Cranfield University

14 Filt lter erClea Clear: F Four m media ia 35 Physical Ch Char arac acteristics cs of M Media Mediu Me dium Mat Material al De Dens nsity Mo Modal dal Pac acki king (t/m 3 ) (t/ par article siz size void (mm) mm) (fr frac action) Anthracite C 1.41 1.4 0.51 Silica SiO 2 2.59 0.70 0.52 Alumina Al 2 O 3 3.92 0.60 0.55 Magnetite Fe 3 O 4 5.10 0.35 0.47 Loose packing of spheres ≈ 0.42 Compacted packing of spheres ≈ 0.33 35 Data from Philani Ncube/Pete Jarvis, Cranfield University

Filt lter erClea Clear: Applic licatio ions 39 Municipal Water & Wastewater • − Tertiary treatment − Potable water pre-filtration − Pre-filtration for RO desalination − Washwater recovery − Framework Supplier to Anglian Water Industrial / Commercial • − Process and cooling water filtration − Rainwater harvesting − Industrial effluent treatment − Mobile water treatment Scaleable from 1 – 330 l/s per filter • Triplex plant, 1.84m dia vessels, capacity up to 56 l/s Kiosk size: 13m x 3.5m 39

Filt lter erClea Clear vs Compe mpetition 40 Comparison son of o opti tion ons f s for terti tiary f filtr tration on a at a a waste tewate ter t treatm tment w t works: s: Continuous Rapid Gravity Feature FilterClear Backwash Sand Disk Filter Microfilter Sand Filter Filter Removes >75% of suspended      solids      Compact footprint      Low energy consumption      Low capital cost      Low backwash volume      No chemicals required 40 40

Filt lter erClea Clear: B Benefit its 41 High quality filtrate, in a single step • High loading rate, giving reduced footprint and fewer/smaller vessels • High dirt holding capacity, giving reduced backwash volume • Enables reduced CAPEX, OPEX & whole life cost • No chemicals required for most applications • 41

Bw BwB: Pi Pilot / / Demon onst stration Pl Plan ants 42 • Two containerised pilot plants for water & wastewater trial purposes • Smaller test rigs for quick testing • Particle size analysis 42