bluewater bio · • municipal water & wastewater −tertiary treatment −potable water...
TRANSCRIPT
Bluewater Bio
FilterClear Overview
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BwB: FilterClear™
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Compared to:
• Continuous backwash filters
• Deep bed filters
• Other multimedia filters
Key advantages of FilterClear 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
FilterClear: Advantages 33
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FilterClear: Four media 34
Anthracite, mode = 1.4 mm Silica, mode = 0.70 mm
Alumina, mode = 0.60 mm Magnetite, mode = 0.35 mm
Photographs taken by Philani Ncube/Pete Jarvis, Cranfield University
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FilterClear: Four media 35
Physical Characteristics of Media
Data from Philani Ncube/Pete Jarvis, Cranfield University
Medium Material Density (t/m3)
Modal particle size
(mm)
Packing void
(fraction)
Anthracite C 1.41 1.4 0.51
Silica SiO2 2.59 0.70 0.52
Alumina Al2O3 3.92 0.60 0.55
Magnetite Fe3O4 5.10 0.35 0.47
Loose packing of spheres ≈ 0.42
Compacted packing of spheres ≈ 0.33
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FilterClear: Applications 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
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FilterClear vs Competition 40
Comparison of options for tertiary filtration at a wastewater treatment works:
Feature FilterClear Rapid Gravity
Sand Filter
Continuous Backwash Sand
Filter Disk Filter Microfilter
Removes >75% of suspended solids
Compact footprint
Low energy consumption
Low capital cost
Low backwash volume
No chemicals required
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• 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
FilterClear: Benefits 41
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BwB: Pilot / Demonstration Plants
• Two containerised pilot plants for water & wastewater trial purposes
• Smaller test rigs for quick testing • Particle size analysis
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