1. Filtration Technologies Comparison for Tertiary Treatment

2. Contents Tertiary Treatment Definition Sand Filters Cloth Disc Filters
Comparison table
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3. 1
Tertiary Treatment Definition

4. Tertiary Treatment Definition
Process used when water is to be used for irrigation, recreation, drinking water
To better protect public health and environment
Involves Specific processes
Filtration
Coagulation (iron / aluminium salts)
Activated carbon adsorption
Additional disinfection
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5. Tertiary Treatment Definition
Involves a series of steps to further reduce organic concentration, turbidity, N, P, metals, and pathogens
Filters
Settling tank
Disinfection tank
(Sand, Discfilter…)
Discharge to environment
filters out protozoans & pathogenic bacteria
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6. Tertiary Treatment Definition
Applications
Remove Solids & Colloidal particles
Filtration
Chemical coagulation + settlers
Remove Nutrients
Nitrification
Denitrification
Phosphate Precipitation
Remove Dissolved Solids
Reverse Osmosis
Electro-dialysis
Kill Pathogens
UV Disinfection
Chlorination
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7. Middle East Wastewater Treatment Market
Expected increase of Tertiary
Treatment:
Landscaping
Cooling system
Better discharged water quality
Water reuse
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8. 2
Sand Filters

9. Sand Filters Widely used and reliable technology
Possibility of using Multi Media for better performances
Choice of several technologies
Gravity Filters
Pressure Filters
High efficiency in terms of
Helming eggs and TSS removal
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10. Sand filter operation
Filtration cycle:
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11. Sand filter operation
Backwash cycle:
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12. Sand Filter Applications
Downstream of conventional Biological Treatment
Downstream of Biofilm System
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13. 3
Cloth Disc Filters

14. Cloth Disc Filters Proven Technology Rotating Disc Type unit panels
Around 820 references worldwide
In operation since 1992
Rotating Disc Type unit panels
Gravity System
Continuous Filtration
Compact Solution
70-80% smaller than Sand Filters
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15. Cloth Disc Filters
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16. Disc Filter Operation
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17. Disc Filters Features Simple design Sturdy Low foot print Simplicity
Reliable,
Minimization of mechanical and ancillary parts
Sturdy
Made of 304 or 316 stainless steel
Low foot print
• 70-80% smaller footprint than sand filters
• Low install cost
Simplicity
• Installation,
• Controls
• Maintenance,
• Operation
Flexibility:
• For corrosive environments, components
• New Filtration target and increased
Capacity can be achieved by simple changing or adding discs
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18. Disc Filters Applications
Downstream of Conventional Biological Treatment
Downstream of a Biofilm System
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19. Disc Filters Applications
RBC and Disc Filter in same structure
ActiDisk (Actiflo + Disc Filter)
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20. 4
Comparison Tables

21. Main Advantages
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22. Performances comparison
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23. Carbon Foot Print comparison
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24. Conclusion
Disc filter provides solution for most Tertiary Treatment Cases
Disc Filter is better in terms of Foot print and Carbon foot print
Disc Filter is cheaper by far in terms of CAPEX and OPEX compared to Sand filters
Difficult to guarantee less than 5 mg/l SS with out Disk Filter
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