Powdered activated carbon contactor - Pulsazur

1. Pulsazur™
POWDERED ACTIVATED CARBON
CONTACTOR
DRINKING
WATER
ELIMINATE ORGANIC MATTER AND MICRO-
P-PPT-EP-011-EN-1004
POLLUTANTS WITH LOW OPERATING COSTS

2. DRINKING CONTENTS
WATER
Pulsazur™
Pulsazur™ Product
Using Pulsazur™
Features specific to the process
Pulsazur™ as part of a treatment line
Advantages of Pulsazur™
Case Study: Apremont (85), FRANCE
Case Study: Gorron (53), FRANCE
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3. DRINKING
WATER
Pulsazur™ PRODUCT
Pulsazur™ • Pulsazur™is a new process that uses adsorption over
powdered activated carbon (PAC) in a sludge blanket reactor.
• Pulsazur™is used to treat water that contains a high level of
dissolved matter after suspended solids have been reduced.
• Pulsazur™is used to obtain water of a constant quality from a
variable raw water throughput and quality with a minimum
flow >50% of nominal flow.
Treated water
Pre-clarified water
PAC +
Coagulant
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4. DRINKING
WATER
USING Pulsazur™
Pulsazur™ • Pulsazur™ is a structure that forms part of a conventional or
membrane potable water treatment line
• Pulsazur™ is used during the polishing treatment stage for
adsorption of:
– Micro-pollutants (pesticides, molecules responsible for taste and
odors)
– Dissolved organic matter (TOC >10 mg/L)
• Pulsazur™ is positioned downstream from pre-clarification and
upstream from the sand filter:
– For optimum adsorption, it is advisable to reduce suspended solids
– Filtration through sand constitutes a safety barrier as it screens out
solid particles (PAC leaking out with the coagulant)
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5. DRINKING
WATER
FEATURES SPECIFIC TO Pulsazur™
Pulsazur™ • The quality of the treated water depends on the
resistance of the PAC bed and on the PAC selected
– PAC bed resistance demands:
• A maximum sedimentation rate of 4m/hour
• A 2.60 m deep PAC bed
– The PAC selected is the NORIT SA Super
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6. Pulsazur™ AS PART OF A TREATMENT LINE
As part of a conventional line, Pulsazur™ is used to produce water of a constant quality.
Chlorine
PAC
Pre-clarified water
(by sedimentation or Refined water
floatation)
Coagulant Pulsazur™ Aquazur™
PAC reactor Sand filtration
As part of a membrane line, the Pulsazur™ contributes to the production of good quality
water from poor resources.
Chlorine
Backflush water
Refined water
Coagulant
PAC
PAC
Pre-clarified water
(by sedimentation or
floatation)
Coagulant Pulsazur™ Aquazur™ Ultrazur™
PAC reactor Sand filtration Ultrafiltration
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7. Pulsazur™ ADVANTAGES
• A PROVEN TECHNOLOGY
– Pulsed bed clarification, a reliable technology
found in applications throughout the world
• CONTROLLED HYDRAULICS ENSURING THAT THE
PAC BED IS MAINTAINED AND THAT THE RATE
THROUGH THE APPLIANCE REMAINS STEADY
• A FLEXIBLE OPERATION THAT COPES WITH
CHANGES IN FLOW OR QUALITY
– By adjusting pulse and sludge extraction
frequency and duration
• OPTIMUM USE OF POWDERED ACTIVATED CARBON
WHICH IS KEPT HOMOGENOUS BY THE INCOMING
PULSED FLOW
• EASY MAINTENANCE
– No submerged units, no abrasion or corrosion
possible
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8. CASE STUDY:
APREMONT (85), FRANCE
CONTEXT: DESIGN:
• Client: Intercommunal • Treatment capacity: 40,000 m3/day
d’Alimentation en Eau Potable de • Treatment Line:
la Haute Vallée de la Vie (Local – Ozonization
Authority) – Flocculation
– Aquadaf™ floatation
• Operator: SAUR – CO2 re-mineralization & lime
• Commissioned: Summer 2009 – Pulsazur™
– Aquazur™ V filtration
• Reservoir water, Apremont dam – Ultrazur™ aqs450F
– Turbidity:
• 10 to 20 NTU (peaks of 200 NTU) • Number of Pulsazur™: 2
• Total water flow to be treated: 2,260 m3/hour
– Organic matter:
– TOC between 7 and 15 mg/l with a • PAC dosage: from 5 to 20 mg/L
24 mg/l peak • FeCl3 dosage: 1mg FeCl3 / mg PAC
– Pesticides:
• Diuron up to 1.1 µg/l
• Triazines <0.5 µg/l .
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9. CASE STUDY:
GORRON (53), FRANCE
CONTEXT: DESIGN:
• Client: Syndicat d’Eau du Nord • Treatment capacity: 3,000 m3/day
Ouest Mayennais (SENOM) (Local • Treatment Line:
Authority) – Pre-ozonization
– Pre-re-mineralization
• Commissioned: February 2009 – Coagulation/flocculation
• Raw water quality: – Pulsatube™ clarification
– Turbidity: – Inter ozonization
• 2.9 to 241 NTU – Lime re-mineralization
– Pulsazur™
– Organic matter : – Aquazur™ twin layer filtration
• TOC between 2.5and 20.6 mg/L – Chlorination
– Pesticides: • Pulsazur™ output: 150 m3/hour
• Atrazine: up to 7.86 µg/L • PAC dosage: de 5 to 20 mg/L
• Alachlor: up to 3.66 µg/L
• Total pesticides of 0 to 13.7 µg/L • FeCl3 dosage: 1mg FeCl3 / mg PAC
– M-Alk of 2.2 to 2.4°F
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