Azurair™Boost

CONTROL THE ODOR POLLUTION OF

WASTEWATER TREATMENT PLANTS

IN WARM CLIMATES

AIRDEODORIZATION OF WASTEWATER TREATMENT

PLANTS THROUGH ADVANCED

DESULPHURIZATION

P-PPT-A-001-EN-1107

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CONTENTS

Azurair™

Boost � Azurair™ Boost in the odor removal solutions range

� H2S Emission: a problem in warm climates

� Description of the Azurair™ Boost technology

� Operating principle

� Advantages of Azurair™ Boost

� Case Study: As Samra, JORDAN

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Azurair™

Boost

Model ProcessTreated

CompoundsAir Flow Rate(per unit)

Plant Size

Azurair™ B BiologicalH2S

(low and medium-level concentrations)

From300 to 20,000 Nm3/h

< 100,000 PE

Azurair™ B Twin Biological in 2 stagesH2S

and mercaptansFrom 700 to 5,000 Nm3/h < 20,000 PE

Azurair™ BoostBiological Pretreatment+

physicochemical PolishingH2S

(high concentrations)From 300 to 16,000 Nm3/h

(Biofilter stage)> 250,000 PE

Azurair™ C Physical & ChemicalSulfured and nitrogenous

compoundsFrom 3,000 to 80,000 Nm3/h

> 15,000 PE

Azurair™ Boost IN THE ODOR

REMOVAL SOLUTION RANGE

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H2S EMISSION: A PROBLEM IN WARM

CLIMATES

• The hydrogen sulfide formation results from combination of several factors such as:–High temperature,–Extensive sewerage networks,–A high staying time,–Anaerobic conditions with low flow rates.

These conditions are often encountered in hot countries, such asMiddle East, Latin America, Asia.

• H2S is emitted on equipments such as lifting stations, weirs, primary settling tanks, or at the entrance of aeration tanks.

• H2S create security problems: Inhalation can cause – depending on the quantity – loss of consciousness et even death.

• H2S corrodes concrete and metal within sewerage facilities.

• H2S is extremely smelly: its emission generates odor pollution.

Azurair™

Boost

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Azurair™ Boost DESCRIPTION

Azurair™

Boost

Azurair™C, as polishing system, on

whole WWTP odor control unit

Biotrickling filter on high

H2S concentrations + =

Azurair™

Boost

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OPERATING PRINCIPLE:

BIOTRICKLING FILTER

Biotrickling filter on synthetic media:– H2S max concentration: 500 to 1,000 ppm– Efficiency: up to 99 %– Flowrate: max 16,000 m3/h

PACKING

INSIDE

Azurair™

Boost

AIR

BLOW-

DOWN

WATER

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Arriving at the base of the tower, the air passes through the media with low speed; H2S is then transferred into the biofilms loaded with micro-organisms. These micro-organisms will use the H2S in their metabolism and remove it.Biofilms are regularly sprayed to optimize their performance.

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OPERATING PRINCIPLE: Azurair™ C

Azurair™

Boost� Physico-chemical treatment that adapts instantly to any change of load meet the guarantees.

• The waste air is extracted from the plenum is transmitted using a fan into the tower or towers in

series.

• The air is injected into the tower under the packing support floor where the chemical desctructionsreactions occur.

• For each pollutant family, a specific reagent neutralizes and eliminates the malodorous compounds.

• After the packing, above the solution distribution system, the air encounters a heavy-duty demister. This limits the carry-over of drops at the outlet.

• The air is then either discharged via a flue.

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ADVANTAGES OF Azurair™ Boost

Azurair™

Boost

Security and environment:• Treatment in a confined zone immediately adjacent to the point of emission: secure work environment, suppress sanitary danger,• Avoid unpleasant odors for local populations,• Low footprint.

Economy and simplicity of operation:• Very low electricity consumption of the biofilter,• Sharp decrease of bleach consumption: 99% savings, • Operates with outlet water filtered on the biofilter, • Simplicity of equipment and instrument use, automated operation.

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CASE STUDY:

AS SAMRA, JORDAN

CONTEXT:

• Construction of a 3 million PE capacity WWTP

• Commissioning Date: 2006

What makes the project specific:

The plant configuration makes it emit H2S on a desulfurization work conceived to eliminate strong loads of sulfides in the raw water.It was necessary to “relieve” the global deodorization of the site by treating the air in a zone immediately adjacent to the point of emission of H2S.

DESIGN:

• 3 equipments that treat 16,000 m3/h and that save the equivalent of 3.7 kg/h of bleach

RESULT:

• 99% of the pollution is eliminated

• Savings of 2,200 tons of bleach per year