Deodorization of wastewater treatment air plants through advanced desulphurization

1. Azurair™
Boost AIR
DEODORIZATION OF WASTEWATER TREATMENT
PLANTS THROUGH ADVANCED
DESULPHURIZATION
CONTROL THE ODOR POLLUTION OF
WASTEWATER TREATMENT PLANTS
P-PPT-A-001-EN-1107
IN WARM CLIMATES

2. AIR
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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3. Azurair™ Boost IN THE ODOR
AIR
REMOVAL SOLUTION RANGE
Azurair™
Boost
Treated Air Flow Rate
Model Process Plant Size
Compounds (per unit)
H2 S
From
Azurair™ B Biological (low and medium-level
300 to 20,000 Nm3/h
< 100,000 PE
concentrations)
H2 S
Azurair™ B Twin Biological in 2 stages
and mercaptans
From 700 to 5,000 Nm3/h < 20,000 PE
Biological Pretreatment+ H2 S From 300 to 16,000 Nm3/h
Azurair™ Boost physicochemical Polishing (high concentrations) (Biofilter stage)
> 250,000 PE
Sulfured and nitrogenous From 3,000 to
Azurair™ C Physical & Chemical
compounds 80,000 Nm3/h
> 15,000 PE
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4. H2S EMISSION: A PROBLEM IN WARM
AIR
CLIMATES
Azurair™
• The hydrogen sulfide formation results from combination
of several factors such as:
Boost – High temperature,
– Extensive sewerage networks,
– A high staying time,
– Anaerobic conditions with low flow rates.
These conditions are often encountered in hot countries, such as
Middle 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.
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5. AIR
Azurair™ Boost DESCRIPTION
Azurair™
Boost
Biotrickling filter on high Azurair™ C, as polishing system, on
Azurair™
H2S concentrations + whole WWTP odor control unit
= Boost
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6. OPERATING PRINCIPLE:
AIR
BIOTRICKLING FILTER
Azurair™ Biotrickling filter on synthetic media:
Boost – H2S max concentration: 500 to 1,000 ppm
– Efficiency: up to 99 %
– Flowrate: max 16,000 m3/h
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.
PACKING
AIR INSIDE
WATER
AIR
BLOW-
DOWN 6

7. AIR
OPERATING PRINCIPLE: Azurair™ C
Azurair™ Physico-chemical treatment that adapts instantly
Boost 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 desctructions
reactions 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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8. AIR
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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9. CASE STUDY:
AS SAMRA, JORDAN
CONTEXT:
• Construction of a 3 million PE capacity
WWTP
• Commissioning Date: 2006
What makes the project specific: DESIGN:
The plant configuration makes it emit H2S • 3 equipments that treat 16,000 m3/h and
on a desulfurization work conceived to that save the equivalent of 3.7 kg/h of
eliminate strong loads of sulfides in the bleach
raw water.
It was necessary to “relieve” the global
RESULT:
deodorization of the site by treating the • 99% of the pollution is eliminated
air in a zone immediately adjacent to the • Savings of 2,200 tons of bleach per
point of emission of H2S. year
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