Aeration Products

For energy-efficient biological treatment

Introduction

Greater energy savings

are in the air
Stricter environmental regulations and rising
energy costs are forcing wastewater treatment
plants to ensure wastewater discharge
compliance and at the same time make
operations more energy efficient. One of the
main areas for environmental and cost savings
lies just below the surface of your biological
tanks.

Uncover submerged energy savings

Aeration systems today represent an estimated 30
to 70 percent of the total energy costs at a typical
wastewater treatment plant. By making your plants
biological treatment processes more efficient,
you can realize big energy savings and lower your
operating costs.

Reliable cost-effective aeration solutions

Proven reliable for more than 40 years,
comprehensive aeration solutions from Sanitaire
and Flygt meet virtually every need and operating
condition. From fine bubble diffusers complete with
framework, piping, supports and energy-saving
blowers to coarse bubble diffusers and stand-alone
mechanical aerators, our aeration systems reduce equipment isnt everything. Competence is. Our
both your capital expenditures and operating and engineers put more than four decades of expertise
maintenance costs. Plus they are backed by precise and a true passion for high oxygen transfer to work
monitoring and control systems. to ensure environmentally sound operations at
your plant. So everything you need to know about
Optimizing your aeration processes improving your aeration processes is available
Although we offer the best aeration equipment, through a single and reliable partner.

Contents
Page

Diffused aeration 411

Sanitaire Gold Series diffusers 5
Sanitaire Silver Series II diffusers 6
Sanitaire ceramic diffusers 7
Sanitaire diffuser holders 8
Sanitaire grid components 9
Sanitaire coarse bubble wide band diffusers 10
Blowers 11

Mechanical aeration 1213

Flygt jet aerators 12

Monitoring and control 14

Support and service 15

 Design

More oxygen
delivered per kilowatt
hour
Factors to consider
when designing your
aeration system:

Standard oxygen
transfer efficiency
(SOTE)
Used to compare
oxygen transfer
efficiency, SOTE is
the ratio between the
amount of oxygen
transferred and the
amount actually
delivered. Performance
can reach up to 60%
depending on the water
depth and airflow rate.

Standard aeration
efficiency (SAE)
SAE is the ratio between
the amount of oxygen
transferred to the
water and the amount
of energy used. Typical
values are 12 kg
To optimize your process, we design, deliver, commission and, through control systems, O2/kWh for mechanical
support the operation and maintenance of your aeration system from blowers to diffusers. aeration systems and 28
kg O2/kWh for diffused
aeration systems.
SAE reflects both
We understand how different efficiency and energy savings. SOTE as well as blower
efficiency and the
operating strategies and equipment Whatever the challenge, be sure to system pressure loss.
selection affect energy consumption take advantage of our vast aeration
and costs, so we can determine where engineering expertise. This not only
additional operational efficiencies can will improve aeration efficiency at
be realized. Introducing an automated your plant, but enable you to focus
monitoring and control system or on increasing the profitability of your
combining diffusers with mixers, core business.
for instance, can drastically boost

Which aerator is right for you?

Treatment stages Applications Diffused aeration Mechanical aeration

Grit chamber Coarse bubble

Preliminary and primary
Retention basin Coarse bubble/Fine bubble Jet aerator

Secondary Biological aeration Fine bubble Jet aerator

Tertiary Aeration before discharge Fine bubble

Aerobic digestion Jet aerator

Sludge Sludge holding Coarse bubble/Fine bubble Jet aerator
Odor control Fine bubble Jet aerator
 Diffused aeration

Dissolving into thin air

Grid components

To support Sanitaire
fine bubble diffused
aeration systems, we
offer standardized
grid components.

See page 9.

For reliable oxygen transfer in all and sludge holding odor control.
types of wastewater aeration Choose between Sanitaire Gold
applications, choose Sanitaire Series for high efficiency, Sanitaire
diffused aeration systems. No Silver Series II membrane diffusers
matter the tank geometry or for standard and low-pressure
process application, Sanitaire aeration applications, and the Air supply
systems have proven effective in durable Sanitaire ceramic diffusers
thousands of communities and for applications that require corrosion No aeration system
industries worldwide. resistance. would be complete
without an air supply
and distribution
Customize your system Coarse bubble diffusers
system. Using in-
Select the right components from the For tougher applications such as house tools, we
Sanitaire range and combine them sludge or industrial wastewater, optimize designs
with an air piping system, required Sanitaire coarse bubble diffusers are for temperature
support and an energy-efficient the preferred technology. Typically and pressure
considerations. We
blower. used in grit chambers, retention
also complement
tanks and sludge holding tanks, the Sanitaire aeration
Fine bubble diffusers Sanitaire wide band diffuser doesnt system with
Sanitaire fine bubble diffusers are disappoint. dependable blowers.
generally employed for biological
See page 11.
aeration, pre-discharge aeration
 Diffused aeration

Sanitaire Gold Series diffusers

Sanitaire Gold Series membrane diffusers are the
latest innovation in fine bubble aeration
technology. Wherever high-density coverage and
low flux rates are required, these can be tightly
packed across any given basin floor area to
provide unsurpassed aeration efficiency.

Energy efficiency
The unique diffuser geometry, and advanced
micro-punched membrane enable high-density
basin floor coverage and low air flux, which
together provide high oxygen transfer using the
lowest possible amount of energy. The membrane
is engineered for low head loss thereby reducing
energy consumption further.

High reliability Ease of installation

Thick, highly pliable polyurethane membranes Compactness makes these complete, pre-
outlast others in accelerated aging tests. assembled diffusers easy to install. This translates
Dependability is further enhanced by the watertight into faster commissioning, smarter use of resources
construction of the end fittings and sealing system, and, ultimately, higher productivity.
which withstand the stress of daily operation. It
has even proven to be adapted to air-on/air-off Modularity
applications. Modular design facilitates installation as well as
low-cost, no-hassle retrofits because all Sanitaire
components are interchangeable to enable
optimization of aeration system performance.

Performance curves
Technical data
Gold Series
70 Membrane material Polyurethane
High diffuser density
60 Low diffuser density

Lengths 2,286mm (90 in)

50 1,500mm (59 in)
8 m*
700mm (28 in)
SOTE (%)

40 6m
Airflux range 3.737 Nm3/h /m2
30 4m 0.22 scfm /ft2

20
Standard oxygen transfer 710% per m submergence
efficiency (SOTE) 2.23% per ft
10

0 Standard aeration 38 kg O2 /kWh

0 10 20 30 40 efficiency (SAE) 815 lbs O2 /hph
Flux (Nm/h/m2)

*Submergence
Diffused aeration

Sanitaire Silver Series II

diffusers
For a combination of high aeration efficiency and
low operating costs, theres the Sanitaire Silver
Series II membrane diffuser the most widely
used fine bubble diffused aeration system
available today.

High oxygen transfer efficiency

The Sanitaire Silver Series II membrane features a
unique slit pattern and slit shapes, which disperse
air bubbles in an extremely fine, uniform pattern for
optimal oxygen transfer.

Long service life, low maintenance

The high elasticity and degradation-resistance of
specially blended high-grade EPDM elastomer
compounds contribute to a service life of 10 or
more years.

Operating efficiency
The unique membrane shape, integrated o-ring
and top-sealing threaded retainer ring eliminates
leakage. This reduces energy consumption and
Sanitaire Silver Series II LP
raises operating efficiencies.
This 9 inch low-pressure version of the Sanitaire
Silver Series II membrane features a modified
Great application flexibility
slit pattern to handle airflow up to 17 Nm/h
A highly effective, integrated check valve enables
(11 scfm) with minimal pressure loss. It is an
the aeration zones to easily be shut down for air-on/
excellent choice for sludge and other heavy-duty
air-off applications.
applications.

Performance curves
Technical data
Silver Series II
50 Disc material Specially blended high-
6 diffusers/m grade EPDM
1 diffuser/m
40
Diameter 178 or 229 mm
6 m*
(7 or 9 in)
30 5m
SOTE (%)

4m Airflow range per disc 0.87 Nm/h

20 3m (0.54.5 scfm)

Standard oxygen transfer Approx. 6.5% per m

10 efficiency (SOTE) submergence (2% per ft)

0 Standard aeration 2.56 kg O2 /kWh

0 1 2 3 4 5 6 7 efficiency (SAE) (410 lb O2 /hph)
Airflow per diffuser (Nm/h)

*Submergence
 Diffused aeration

Sanitaire ceramic diffusers

Sanitaire ceramic diffusers handle aeration of

aggressive, highly corrosive wastewater,
delivering high oxygen transfer both efficiently
and cost effectively.

Low total cost of ownership

Sanitaire ceramic discs are specially
compression-molded to achieve optimal contours
for high oxygen transfer efficiency at low operating
pressures. Variable areas of density across the disc
surface promote uniform airflow distribution. This
contributes to low system head loss, low energy
consumption, low operating costs and, thereby, a
low total cost of ownership.

Energy efficiency
Sanitaire ceramic discs feature a top-sealing
threaded retainer ring, which ensures an airtight
seal. As air pressure increases, the sealing force on
the o-ring increases, thus creating an airtight seal.
Because there are no air leaks, no energy is wasted.

20-year-long life expectancy

Durable, reliable and clog-resistant, Sanitaire
ceramic discs are low-maintenance diffuser
elements that typically last 20 or more years. To
prolong service life further, an optional in-place gas
cleaning system enhances continuous performance.

Performance curves
Technical data
9" ceramic
50 Disc material Special compression-
6 diffusers/m molded ceramic
1 diffuser/m
40
Diameter 178 or 229 mm
(7 or 9 in)
6 m*
30
SOTE (%)

5m
Airflow range per disc 0.54.7 Nm/h
4m
20
(0.33 scfm)
3m

Standard oxygen transfer Approx. 6.5% per m sub-

10 efficiency (SOTE) mergence (2% per ft)

0 Standard aeration 2.56 kg O2 /kWh

0 1 2 3 4 5 6 7 efficiency (SAE) (410 lb O2 /hph)
Airflow per diffuser (Nm/h)

*Submergence
Diffused aeration

Sanitaire diffuser holders

These easy-to-install Sanitaire diffuser holders
provide superior mechanical strength to
support Sanitaire Gold Series and Silver Series II
membranes and Sanitaire ceramic discs.

Sanitaire 2300 holder Sanitaire 2802 holder

Designed for use with Sanitaire Silver Series II A cost-effective alternative, the Sanitaire 2802 is
membranes, Sanitaire Silver Series II LP membranes designed for use with the Sanitaire Silver Series II
and Sanitaire ceramic discs. and Silver Series II LP membranes.

Retainer ring Check valve Membrane diffuser Retainer ring Integrated Check valve Membrane diffuser
subplate

Integrated
o-ring
Diffuser holder
Integrated
o-ring
Airflow control
Diffuser holder
Air distribution
pipe
Airflow control
Air distribution
pipe

Sanitaire Gold Series holder

Retainer ring Profiled ceramic diffuser
Designed for use with Sanitaire polyurethane
membranes and based on the highly efficient cross-
section of the 7" holder.

Stainless Wing Membrane diffuser

steel strap
o-ring
End fitting

o-ring
Gasket

Diffuser

Airflow control Wing support

Air distribution Air distribution
pipe Airflow control
pipe
 Diffused aeration

Sanitaire grid components

Beneath every Sanitaire diffused aeration system
is a solid foundation. These components are
Drop pipe
integral to the Sanitaire fine bubble range and
or dropleg
hold important supporting roles.

Condensate
Solid framework purge line
Patented Sanitaire spline joints ensure firm
connection of air supply pipes from the dropleg
to the diffusers. Engineered to withstand thermal Diffusers
expansion and contraction, water hammer and
other dynamic stress, these spline joints securely
fasten the pipes, thereby preventing air leakage,
pipe blowapart and pipe rollover.

Upstanding system support Manifold

Made of durable corrosion-resistant stainless steel,
Sanitaire guide supports securely anchor Sanitaire Support/anchorage system

diffused aeration systems. These robust threaded

supports feature an infinite height adjustment
mechanism to ensure accurate grid leveling.
The pipe bracing assembly accommodates pipe
expansion while providing a stable foundation.
Specially reinforced Sanitaire guide supports are requirements, for example, its easy to replace
available for high velocity and mixer zones. Sanitaire ceramic discs with Sanitaire Gold Series or
Silver Series II membranes.
Easy to adapt
Sanitaire air distribution pipes are delivered with Aeration purging
factory-welded diffuser holders and Sanitaire After condensation, water levels in the manifold can
Gold Series are delivered as pre-assembled units, rise and extend to the headers. To deal with water
to facilitate installation. Moreover, Sanitaire grid buildup, we offer a separate purge system that
components are fully interchangeable with your removes condensate from the lowest point in the
existing system. To meet more stringent emissions system.

Technical data

Dropleg Stainless steel AISI 304 or

316

Manifolds Stainless steel, specially

formulated polyvinyl
chloride (PVC) to prevent
UV degradation.

Distribution headers PVC or CPVC for higher

temperatures

Supports and anchor bolts Stainless steel AISI 304 or

316

Gaskets EPDM
Spline joints Adjustable grid support
Diffused aeration

Sanitaire coarse bubble

wide band diffuser
The Sanitaire stainless steel wide band diffuser
is an excellent choice and a smart alternative
to mechanical aeration. It is especially suited
to tough sludge-related applications such as
aerobic sludge digestion, grit chambers, flow
equalization and channel aeration.

Clog-resistant, maintenance-free design

The Sanitaire wide band diffuser features an
innovative inverted air reservoir. This stores a
sufficient air volume at the center of the diffuser
for use to ensure continuous and uniform airflow.
This prevents clogging. Another smart feature is
a bottom deflector, which prevents the entry of
debris into the diffuser and reduces the need for
maintenance.

Erosion/corrosion resistance
Thanks to immersion passivation after fabrication,
the Sanitaire wide band diffuser is erosion/
corrosion-resistant and maintains full structural
integrity even in welded heat-affected zones. This
prolongs service life.

Solid oxygen transfer efficiency

Dual horizontal levels of diffusion ports on the
diffuser side ensure uniform air distribution and
aeration efficiency.

Technical data

Material Stainless steel AISI 304

or 316

Length 305 or 610 mm

(12 or 24 in)

Airflow range per band 1563 Nm/h

(1040 scfm)

Standard oxygen transfer 1.62.5% per m submer-

efficiency (SOTE) gence (0.50.8% per ft)

Standard aeration 0.72 kg O2 /kWh

efficiency (SAE) (1.13.5 lbs O2 /hph)
 Diffused aeration

Blowers

Optimizing your aeration systems is of

paramount importance. Which is why we can
complement every Sanitaire diffused aeration
system with a fully packaged blower system that
is reliable, energy-efficient and easy to maintain.

It takes experience and expertise to select the right

blower for your aeration system. We have both. We
understand the parameters that influence blower
selection from energy efficiency and reliability to
life cycle cost, operational flexibility and installation
footprint through to noise levels and maintenance
requirements.

Whatever your aeration needs, we help you select

the right blower from among these technologies, centrifugal blowers, however are also generally less
which are typically found in a wastewater treatment efficient.
plant.
Single-stage, integrally geared
Rotary lobe blowers centrifugal blowers
A pair of spinning rotors delivers a fixed volume A single impeller achieves higher rotational speed
of air for each rotation. Rotary lobe blowers rely via a step-up gear. These can be equipped with
upon external compression whereby the air is variable inlet guide vanes and diffuser vanes to
compressed by the system backpressure. While achieve high efficiency over a range of operating
these offer the advantage of low capital investment flows. Single-stage, integrally geared blowers are
costs upfront, they also provide low efficiency. more efficient than positive displacement and multi-
stage centrifugal blowers.
Screw rotor blowers
A pair of intermeshing screws progressively Variable-speed, single-stage
reduces the volume of air as it moves along the direct-drive centrifugal blowers
length of the screw element. These provide higher A single or dual impeller is mounted directly on to
efficiency than other positive displacement blowers the shaft of a high-speed motor with low-friction
due to the use of internal compression. magnetic or air foil bearings. These have integrated
VFD (variable frequency drive) to match pressure
Multi-stage centrifugal blowers and flow rate demands. While more expensive than
Multiple impellers are mounted on a single low- positive displacement and multistage centrifugal
speed shaft normally operating at a fixed speed. blowers, these are more efficient, with magnetic
These are employed for larger flows and require bearing blowers often being more efficient than
less capital investment than other types of those with air foil bearings.
Mechanical aeration

Flygt jet aerators

Proven N-technology

Flygt jet aerators

feature Flygt N-pumps
with N-technology,
renowned for its non-
clogging design and
high efficiency.

Ejector assembly

Mechanical aeration systems Proven long-term reliability

The robust, non-
from Flygt provide an affordable Flygt jet aerators provide maximum
clogging ejector
alternative to our highly efficient uptime and minimal maintenance. assembly creates high
diffused aeration systems. Proven N-technology, a specially turbulence where
Convenient lift-in, lift-out engineered Flygt ejector assembly wastewater combines
solutions, submersible Flygt jet and air suction pipe bend combine with air to form a liquid
jet containing fine air
aerators provide reliable, low- to provide high operational
bubbles.
cost oxygen transfer for small- reliability.
to medium-sized sludge tanks,
retention tanks and bio-reactors. Better working environment
Because the submersible Flygt jet
Quick, low-cost installation aerator rests on the tank bottom,
Convenience doesnt come easier theres significantly less spray and
than with Flygt jet aerators. Simply lower noise levels and vibrations.
lift and position these stand-alone This greatly improves the working
aeration systems into any small- to environment.
Damper feet
medium-sized tank without having
to empty it, using the Flygt pump lift
Robust stand with
and chains. Installation is complete.
damper feet prevents
Then plug in Flygt jet aerators and vibration, which could
let them work. No blowers, special damage the ejector
housing or superstructures are system.
required.
 Mechanical aeration

Operational flexibility
Compact Flygt jet aerators fit into any tank
regardless of size or shape. Choose the Flygt pump
capacity, number of mechanical ejectors and
materials that match your requirements. Pumps can
serve between one and three ejectors.

Erosion/corrosion-resistant operation
Greater durability can be achieved by choosing the
stainless steel ejector assembly and Hard-Iron
N-impeller over the standard galvanized steel
ejector assembly and cast iron N-impeller.
The Flygt jet aerator consists of air suction pipes, an N-pump,
ejector housings and ejectors.

Performance curves
Working principle:
the velocity of the
60 Oxygen transfer rate depending water creates air
on jet aerator and water depth
(50 Hz) ja317-3202 suction which is
Air
mixed in the ejector suction
50 and transferred into
the wastewater tank.

40
SOTR (Kg O2/h)

30 ja217-3202

ja117-3171
20

ja117-3153

10 ja117-3127
Flygt Ejector
ja112-3102 N-pump
ja112-3085
0 Nozzle Mixing Mixed
0 1 2 3 4 5 6 7
zone flow
Water depth (m)
Liquid

Technical data

Model JA112 JA112 JA117 JA117 JA117 JA217 JA317

SOTR at 4m (13 ft) depth
50Hz, kgO2 /h 1.5* 3.2 7.5 11 15 22 40
60Hz, kgO2 /h (lbsO2 /h ) 2.2 (4.8) 3.3 (7.3) 7.8 (17) 12 (26) 17 (37) 30 (66) 43 (95)
Ejectors 1 1 1 1 1 2 3
Nozzle outlet diameter (mm) 55 55 95 95 95 95 95
Flygt N-pump 3085 MT 3102 MT 3127 MT 3153 MT 3171 MT 3202 MT 3202 LT
Rated power, kW (hp)
50 Hz 2 3.1 5.9 9 15 22 37
60 Hz 2.2 (3) 3.7 (5) 7.5 (10) 11.2 (15) 18.6 (25) 34 (45) 45 (60)
Cooling jacket

Standard aeration
------------------------------- 0.51.2 kgO2 /kWh (0.82 lbsO2 /hph) -------------------------------
efficiency (SAE)

* At 3m (10 ft) depth.

Monitoring and Control

Empowering system
performance

Flygt AquaView
SCADA system

Provides a complete
plant overview
Take command of the performance (PLCs) or SCADA systems. This makes Collects and stores
of your aeration systems with our continuous real-time monitoring of data to identify
monitoring and control systems. To individual components possible. It trends and diagnose
help you meet your responsibilities also provides detailed data on events problems before they
occur
in a constantly changing to identify trends and diagnose
Provides extensive
environment, you can rely on us problems before they even occur. alarm handling
to put you in total control of your With total control, you can boost
entire plant or plant subsystems. energy efficiency every step of the
way and raise performance at your
Saving energy on a daily basis plant.
The Flygt APX process controller
automatically adapts the air supply Total peace of mind
to your oxygen requirements We understand that system reliability
based on daily and seasonal is of paramount importance. With
variations. This drastically reduces us as your single reliable partner,
power consumption and boosts you not only can improve control
energy savings by up to 40%. The over your operations, but improve
information in our systems flows productivity and profitability.
seamlessly to most existing third- Managing your plant from any
party control systems. So after remote location is easy, thanks to
installation, you can immediately web-based tools and online support.
begin saving more energy. Whats more, our control systems are
flexible, scalable and future-proof Flygt APX 700
process controller
Total control, total performance and can accommodate additional
For full end-to-end control of your equipment in virtually any treatment
Distributes the
entire plant, combine the Flygt APX plant configuration.
required oxygen to
process controller with the Flygt tanks and grids
AquaView SCADA system. Both Operates blowers at
are based on open standards, no optimal efficiency
special interfaces are required Provides extensive
alarm handling
to communicate with most
programmable logic controllers
 Support and service

Aeration expertise runs deep

Combining aeration &

mixing technologies

To deliver high oxygen

transfer and mixing We are passionate about optimize flow turbulence in your tanks
efficiencies with minimal the design and execution of and minimize energy consumption.
energy consumption,
comprehensive aeration treatment
you can rely on our
engineers to share their solutions. We have knowledge We use system temperature and
knowledge about system and understanding of the pressure calculations to determine
design. aeration process to safeguard the the optimal conditional for every
wellbeing of your business and the single component in your entire
environment. aeration system from blower to grid.

Extensive systems engineering Grid configuration is another area

Our competence in systems where we excel. We tailor your grid to
engineering runs deep. We can assist meet your requirements for oxygen
you every step of the way from transfer.
developing mixing and aeration
specifications to shop testing. Support all along the way
Through thorough aeration design Customers worldwide have come to
Comprehensive system
design services analysis, we are able to achieve the rely on us for comprehensive range
highest possible oxygen transfer of aeration system components and
System simulation while using the least possible amount accessories, spare parts and support.
utilizing CFD of energy. Whatever your requirements, we
Engineering software support you all the way from
development Smart tools to analyze designing and commissioning to
Advisory services
aeration design optimizing and maintaining your
System design
assistance Our engineers combine their aeration systems.
System specification experience and expertise with
assistance specially developed software
Oxygen transfer programs and tools so that we can
testing
design new and existing aeration
Model testing
installations tailored to your
requirements.

Computational fluid dynamics (CFD)

programs enable our engineers to
simulate your aeration operating
conditions, determine how best to
1) The tissue in plants that brings water upward from the roots

SB004-460 Sanitaire Aeration Products 7/2015 NACT

2) A leading global water technology company

Were 12,000 people unified in a common purpose: creating innovative solutions

to meet our worlds water needs. Developing new technologies that will improve
the way water is used, conserved, and re-used in the future is central to our work.
We move, treat, analyze, and return water to the environment, and we help people
use water efficiently, in their homes, buildings, factories and farms. In more than
150 countries, we have strong, long-standing relationships with customers who
know us for our powerful combination of leading product brands and applications
expertise, backed by a legacy of innovation.

For more information on how Xylem can help you, go to xyleminc.com.

Xylem, Inc.
14125 South Bridge Circle
Charlotte, NC 28273
Tel 704.409.9700
Fax 704.295.9080
855-XYL-H2O1 (855-995-4261)
www.xylem.com/treatment
Sanitaire is a trademark of Xylem Inc. or one of its subsidiaries.
2015 Xylem, Inc. JULY 2015