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Removal of suspended solids and associated pollutants by immersed disk filtration
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WASTEWATER REUSE IN A COMPACT TREATMENT SOLUTION
Compakblue™
REUSE
REMOVAL OF SUSPENDED SOLIDS AND ASSOCIATED POLLUTANTS BY IMMERSED DISK FILTRATION
P-P
PT-R
U-0
01-E
N-1
107
REUSE
2
CONTENTS
Compakblue™
� Water Reuse Challenges
� A Required Water Quality that meets Uses
� Disk Filtration Range
� Compakblue™ Operating Parameters/Conditions
� Compakblue™ Filter
� Operating Principle
� Cloth Filtration Technology (Mecana)
� µ-strainer Filtration Technology (Nordic Water)
� To summarize, the Compakblue™ Advantages
� A cloth Filtration Case Study: Monchy-Saint-Eloi (60), France
� A µ-strainer Case Study: Auxi-le-Château (62), FRANCE
REUSE
3
WATER REUSE CHALLENGES
• To preserve the natural environment• To manage water resources• To relieve the traditional resources• To propose alternative water resources
Countries that are concerned: the United States, Australia, Spain, Middle-East Countries, North Africa…
• No real consensus in the world
• Many countries with the greatest water stress have developed standards or regulations to develop Reuse.
Regulations:
Compakblue™
4
Media Filtration
Membrane Filtration …
.
Treated secondary
UWW
Irrigation ofnon public areas
Unrestricted use in urban
areas
Irrigation of green spaces, golf
Non-food Crop
Reverse O
smosis,
Oxidatio
n/Adsorptio
n…
IndirectPotability
Specific Crop
Industries
Food Crop
Process
A REQUIRED WATER QUALITY THAT MEETS USES, APPROPRIATE TREATMENTS
REUSE
5
DISKS FILTRATION RANGE
Compakblue™ Compakblue™ is the name for Degrémont’s disk filtration systems used in wastewater re-use applications.
Two versions are available: a µ-strainer filtration version, developed by Nordic Water, and a cloth filtration version, developed by Mecana.
Compakblue™ Product
ModelsNumber of disks/filter
Type of filtration Technology Output Quality(SS as 95%tile)
Mecana 2 to 12Specific fabric
100% submerged
< 6 ppm
Nordic Water4 to 28
µ-strainer60%
submerged< 10 ppm
REUSE
6
Compakblue™OPERATING PARAMETERS/CONDITIONS
Treatment objectiveReduction of SS
and the particle pollution
After the secondary clarifier SS <35ppm
Treated water qualityBetween <3 mg/l SS on the average (<6 in 95%ile)
and <5 mg/l SS on the average (<10 in 95%ile)
Compakblue™
Biological
Treatment
Clarifier Tertiary Filtration
Compakblue™
Compakblue™
in the treatment lineTreatedwater
Waterinlet
REUSE
7
Compakblue™ FILTER
• It complements the media filtration technologies for the reduction of Suspended Solids in tertiary filtration.
• Its uniqueness lies in the standardization of its production and its compact size.
• Water to be filtered passes through the disk filters that that hold impurities.
• The tank, available in both a steel or a concrete version, contains the disks that are arranged on a central tube.
• Disks only run during the washing phase.
Compakblue™
REUSE
8
OPERATING PRINCIPLE
Compakblue™
• Compakblue™ is a constant-rate variable-head gravity filter without level regulation.
•The washing is automatic, it is triggered when the water level is exceeded.
9
CLOTH-FILTRATION TECHNOLOGY
The washing of disks is short
and frequent. – It is carried out disk-by-disk with
a suction system for materials retained by the pile fabric.
The filtration is continuous;
no stopping during the cleaning.
Compakblue™ is a mechanical filter developed by the MecanaUmwelttechnik AG Company, in Switzerland; it is the subjectof patents (EP 0958 028).
Cleaning system by suction
Filtration direction
Water to be filtered
Filtered water
Pile fabric seen under the microscope
� OUT / IN FILTRATION
10
µ-STRAINER FILTRATION TECHNOLOGY
The washing of disks is short and frequent.– Water to be filtered is fed into the
central cylinder, penetrates between the disks through openings and travels through the filtering medium on the sides of the disks.
– The dirty water is collected in a trough inside the central cylinder.
The filtration is continuous; no stopping during the cleaning.
� IN / OUT FILTRATION
11
TO SUMMARIZE, THE ADVANTAGES OF
Compakblue™
An alternative to sand filtration when the
Civ. Eng. cost is high– Saves 4 times the surface area,– Preserves natural landscapes,
Easy to install and operate– Integrating systems in tanks
A safe filtration process– Immersed or semi-immersed disks,– Helminth eggs content < 0,1/L in accordance
with the WHO (World Health Organization) recommendations.
12
CLOTH FILTRATION CASE STUDY: MONCHY-ST-ELOI (60), FRANCE
CONTEXT: • WWTP of 30,000 PE• Objective: Discharge in sensitive area • Start-up Date: October 2009
DESIGN:– 2 filters of 6 disks– Total filtering surface area: 60 m²– Disks diameter: 2,10 m– Concrete tank
–Treatment line: activated sludge tank, secondary clarifier, Compakblue™ Filter.
13
µ-STRAINER FILTRATION CASE STUDY: AUXI-LE-CHÂTEAU (62), FRANCE
CONTEXT: • WWTP of 4,000 PE• Objective: discharge into sensitive areas (marina and
then a protected estuary)• Start-up date: beginning of 2011
DESIGN:– 1 filter of 3 disks– Total filtering surface area: 8,4 m²– Flow: 60m3/h– Disks diameter: 1,90 m– Steel Tank
– Treatment line: activated sludge tank, secondary clarifier, Compakblue™ Filter
Disk filters
Water inlet
Treated water