Pulsazur™

DRINKING

WATER

ELIMINATE ORGANIC MATTER AND MICRO-

POLLUTANTS WITH LOW OPERATING COSTS

POWDERED ACTIVATED CARBON

CONTACTOR

P-PPT-EP-011-EN-1004

DRINKING

WATER

2

CONTENTS

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

DRINKING

WATER

3

Pulsazur™ PRODUCT

• Pulsazur™ is a new process that uses adsorption overpowdered activated carbon (PAC) in a sludge blanket reactor.

• Pulsazur™ is used to treat water that contains a high level ofdissolved matter after suspended solids have been reduced.

• Pulsazur™ is used to obtain water of a constant quality from avariable raw water throughput and quality with a minimumflow >50% of nominal flow.

Treated water

Pre-clarified water

PAC +

Coagulant

Pulsazur™

DRINKING

WATER

4

USING 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)

Pulsazur™

DRINKING

WATER

5

•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

FEATURES SPECIFIC TO Pulsazur™

Pulsazur™

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As part of a conventional line, Pulsazur™ is used to produce water of a constant quality.

As part of a membrane line, the Pulsazur™ contributes to the production of good quality water from poor resources.

Pulsazur™ AS PART OF A TREATMENT LINE

PAC

Coagulant Pulsazur™

PAC reactor

Aquazur™

Sand filtration

Pre-clarified water

(by sedimentation or

floatation)

Chlorine

Refined water

PAC

Chlorine

Refined water

PAC

Coagulant

Coagulant

Backflush water

Pulsazur™

PAC reactor

Aquazur™

Sand filtration

Pre-clarified water

(by sedimentation or

floatation)

Ultrazur™

Ultrafiltration

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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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CONTEXT:

• Client: Intercommunal d’Alimentation en Eau Potable de la Haute Vallée de la Vie (Local Authority)

• Operator: SAUR

• Commissioned: Summer 2009

• Reservoir water, Apremont dam

– Turbidity: • 10 to 20 NTU (peaks of 200 NTU)

– Organic matter: – TOC between 7 and 15 mg/l with a

24 mg/l peak

– Pesticides: • Diuron up to 1.1 µg/l • Triazines <0.5 µg/l .

DESIGN:

• Treatment capacity: 40,000 m3/day

• Treatment Line:

– Ozonization

– Flocculation

– Aquadaf™ floatation

– CO2 re-mineralization & lime

– Pulsazur™

– Aquazur™ V filtration

– Ultrazur™ aqs450F

• Number of Pulsazur™: 2

• Total water flow to be treated: 2,260 m3/hour

• PAC dosage: from 5 to 20 mg/L

• FeCl3 dosage: 1mg FeCl3 / mg PAC

CASE STUDY: APREMONT (85), FRANCE

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CONTEXT:

• Client: Syndicat d’Eau du Nord Ouest Mayennais (SENOM) (Local Authority)

• Commissioned: February 2009

• Raw water quality:

– Turbidity: • 2.9 to 241 NTU

– Organic matter : • TOC between 2.5and 20.6 mg/L

– Pesticides: • Atrazine: up to 7.86 µg/L• Alachlor: up to 3.66 µg/L • Total pesticides of 0 to 13.7 µg/L

– M-Alk of 2.2 to 2.4°F

DESIGN:

• Treatment capacity: 3,000 m3/day

• Treatment Line:

– Pre-ozonization

– Pre-re-mineralization

– Coagulation/flocculation

– Pulsatube™ clarification

– Inter ozonization

– Lime re-mineralization

– Pulsazur™

– Aquazur™ twin layer filtration

– Chlorination

• Pulsazur™ output: 150 m3/hour

• PAC dosage: de 5 to 20 mg/L

• FeCl3 dosage: 1mg FeCl3 / mg PAC

CASE STUDY: GORRON (53), FRANCE