Alternative filter media for potable water treatment
Need for Research
Roughing filters at London works:
- Low backwash rates for filters at older works
- Inability to keep sand clean (rising normalised starting head loss)
- Vulnerability to algal laden water
- Loss of production at critical times during the year
- Objective: identify mono-medium & dual media alternatives to
- BSS 14/25 sand
- BSS 14/25 sand / grade 2 coarse anthracite
- Which demonstrate hydraulic advantage & produce acceptable filtrate quality
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