Isodisc - bigger font

1. ISODISC-
most cost-efficient solution for
removal of suspended solids from
waste water
Aquazone, Finland
2017
www.aquazone.fi

2. ISO-DISCT- GENERATION II
BETTER FILTRATION LOWER OPERATING
COSTS TIGHTER FOOTPRINT
www.aquazone.fi

3. ISO-DISC
www.aquazone.fi

4. ISO-DISC
www.aquazone.fi

5. ISO-DISC
www.aquazone.fi

6. State-of-the-Art Design Includes Latest
Operation Features
www.aquazone.fi

7. www.alfalaval.com
© Alfa Laval Slide 1© Alfa Laval Slide 1
ISO-DISC Filter
6A
6A6BUV
Chlorination
Intermittent Filter
Backwash to Headworks
Disinfected Effluent
to Plant Outfall
Typical Municipal Wastewater Treatment – Process Flow Diagram

8. www.alfalaval.com© Alfa Laval Slide 2
Fixed Angular Cloth Media
with
Dynamic Bi-Directional
Linear Backwash Mechanism
influent
Pump suction
for backwash
effluent
ISO-DISC Description

9. www.alfalaval.com© Alfa Laval Slide 3
Exploded View – Filter Plate Anatomy
304SS filter cell frame
FRP media support grid
Cloth media
Neoprene gasket
304SS batten

10. www.alfalaval.comSlide 4
Filter Plate Cassette Isometric
with (3) filter plate construction
Gear drive motor
Screwjack
Screwjack gear
Backflush manifold
304SS frame
Backflush shoe

11. www.alfalaval.com
ISO-DISCTM Advantages
• Outside In Filtration
• Cloth = depth filtration vs. screens
• Completely submerged filter media
• Any filter plate can be isolated & monitored individually
• No Rotating parts/mechanical seals below the water surface
• Bi-Directional Linear backwash mechanism provides uniform media cleaning
• Offered with square or rectangular filter plate configuration (unique in industry)
• Easy fit into existing basins
• Nominal cloth media area is equal to the effective filtration area
• Small footprint to flow ratio
• Ultra-Low Reject Rate (1 - 3%) in TSS removal applications
• Low Driving Force Requirements: 12” (30-cm) of water column
• Easily Expandable to Increase Filtration Capacity
• Continuous Filtration During Backwash & Filter Maintenance

12. www.alfalaval.com© Alfa Laval Slide 6
City of Aledo, TX – Tertiary Filters for AS-H SBR Plant
Model: IDDF-5D60S-304SS (with (5) 5’x5’ filter plates)
Average & Peak Design Flow Capacity: 1.17 & 2.34 MGD (4,432 & 8,864 m3/d)
Dimensions: 12’ long x 7’-5” wide x 9’-3” tall (3.66 m long x 2.26 m wide x 2.82 m tall)

13. www.alfalaval.com
Expected Performance of the ISO-DISC
• The ISO-DISC Cloth Media Filter can typically produce a tertiary plant
effluent with the following quality:
– Total Suspended Solids, TSS: < 5 mg/L
– Biochemical Oxygen Demand, BOD5: < 5 mg/L
– Total Phosphorus, TP: < 0.1 mg/L*
– Effluent Turbidity: < 2 NTU
*with chemical pretreatment and also depending of the influent TP concentration
of the secondary effluent

14. www.alfalaval.com
Cloth disk filter
Benefits vs. competitors
• Simple, robust design
• Completely submerged disks use all area all the time
• No rotating underwater seals
• Disk area = 100% active filtration area
• Outside à In filtration
• Cloth media = depth filtration vs. screens
• Linear backwash mechanism provides uniform media cleaning
• Continuous filtration during backwash or maintenance
• Each disk can be isolated and monitored individually
• Square or rectangular disks easily fit into existing basins
• Low driving force requirement (30cm water column)

15. www.alfalaval.com
Iso-Disc key features
1. Linear backwash system
– Clean entire surface
– Uniform cleaning – No tip speed such as with rotating systems
– Lower backwash flows = lower operating costs due to less pumping
2. Isolate the disks
– 100% use of the cloth life
– Monitor turbidity and throughput
– Potential for significantly reduced redundancy for lower capital and op costs
3. Compact
– Use 100% of filter area not just the lower area such as screen type
– Lower capital costs including installation
4. Outside to In Filtration
– Easier access
– Easier maintenance
5. No rotating underwater seals
– Low maintenance

16. www.alfalaval.com
ISO-DISC product comparison
© Alfa Laval Slide 10
On-Line
Filter Plate
Isolation
No Rotating
Clean Water
Seals
On-Line
Filter
Plate
Removal
Fixed
Filter
Plate
100%
Usable
Filter
Media
Outside
to Inside
Flow
No Spray
Cleaning
No Mist
Cover
Filter Plate
Fully
Submerged
Ashbrook
ISO-DISC®
YES YES YES YES YES YES YES YES YES
Aqua
Aerobics
Aquadisk /
Mecana
NO NO NO NO NO YES YES YES YES
Kruger
Hydrotech
NO NO NO NO NO NO NO NO NO
Siemens
40 – X
NO NO NO NO NO NO NO NO NO

17. Reference: Rahola WWTP,
Tampere, Finland
www.aquazone.fi

18. Reference: Rahola WWTP,
Tampere, Finland
www.aquazone.fi

19. Reference: Rahola WWTP,
Tampere, Finland
www.aquazone.fi

20. Reference: Rahola WWTP,
Tampere, Finland
www.aquazone.fi

21. Reference: Rahola WWTP,
Tampere, Finland
www.aquazone.fi

22. Reference:
Rahola WWTP,
Tampere,
Finland
www.aquazone.fi

23. Reference:
Rahola WWTP,
Tampere,
Finland
www.aquazone.fi

24. Reference:
Rahola WWTP,
Tampere,
Finland
www.aquazone.fi

25. Jyri Koivisto
CEO, eMBA
jyri.koivisto@aquazone.fi
+358 40 725 9009
www.aquazone.fi
Further information
www.aquazone.fi