Water & Wastewater
ENGINEERED FOR LIFE
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Table of Contents
WEDECO Page 4-11
A xylem brand
WEDECO Asset Page 12-13
Our employees
WEDECO Quality Page 14-19
High-quality materials for lasting use
UV Technology Page 20-23
How UV disinfection works with liquids
WEDECO UV Lamp Technology Page 24-27
Long-life & energy efficiency
Ozone Technology Page 28-31
How Ozone oxidation works
WEDECO Effizon® HP Technology Page 32-35
The centerpiece of the WEDECO Ozone generators
Aftermarket & Service Page 36-37
From the start with you
Milestones Page 38-39
The WEDECO success story
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WEDECO
A Xylem brand
We have accepted the challenge of the 21st century. With the
WEDECO brand for UV disinfection and Ozone oxidation, we
own the advanced technologies for chemical-free and environ-
mentally friendly treatment of drinking water, wastewater and
process water, as well as further industrial treatment processes.
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Responsibility
The broad outline of our business is to realize the best possible solution
for mankind and the environment, as well as the most economical
solution for our clients. Our hightech water treatment systems ensure that:
» Water can be recycled and reused
» Water for human use does not cause illness
» Water treatment does not impose a burden on the environment
We constantly invest a large portion of our energy in the development
of hightech components, systems and equipment, as well as in the study
of new areas of application for UV and Ozone. In doing so, we have
always given special attention to the increase in energy efficiency of our
WEDECO products.
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WEDECO - Hightech made
by Xylem
WEDECO systems for UV disinfection and Ozone oxidation are among the
best and most progressive systems in the area of water purification. It is not
just the many years of experience and the mechanical skills of highly qualified
specialists that are behind this success. We also plan, develop, and accurately
engineer your solution. In doing so, the same production and quality standards
always apply, from the smallest to the largest of installations.
Whether you require small UV devices for private use, standard systems,
systems mounted on frames, containerized systems or planned large-scale
installations for industrial or municipal applications: all WEDECO UV and
Ozone systems and their core components are developed, produced and
finally tested in the German Xylem facilities in Herford and Essen.
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Passionate Researchers
We have continuously advanced the development of UV disinfection
and Ozone oxidation through fundamental research. In doing so,
we have become a pioneer in our field. Thanks to our innovations it
is also possible to use these technologies in a sustainable manner
today, for example for the disinfection of drinking water or in paper
bleaching - in a more economically efficient way than ever before.
In close collaboration with research institutions and renowned
companies as well as through direct co-operation with customers,
new possibilities of applications have been developed and tried-
and-tested techniques have been improved. For this purpose we
provide modern, stationary laboratory equipment as well as mobile
test systems.
You can continue to expect well-engineered equipment and innova-
tions from Xylem in the future. You are encouraged to fuel our
passion for discovering new things by discussing your ideas with us.
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The WEDECO Asset:
Our Employees
More than 12000 highly qualified employees at Xylem, 300 of
them working at the production location in Herford, Germany, see
to it that WEDECO systems belong to the best systems for water
treatment in the world.
We consistently rely on well-trained and experienced specialists in
every production step. Many of our employees - whether mechanics,
fitters or electrical engineers - have already worked for over 20 years
in our company. Highly qualified engineers and scientists, trained
in the fields of chemistry, physics, micro-biology, process enginee-
ring, electronics and environmental engineering, contribute with
their unparalleled expertise.
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WEDECO Quality
Whether you need to eliminate microorganisms in wastewater,
disinfect public drinking water or treat process water for
industrial purposes, the equipment used must function reliably
and faultlessly. Therefore, we at Xylem attach particularly
high importance to the quality of our WEDECO products and
services. This starts with the selection of appropriate materials
and goes through the entire development and production
process, right up to certification in accordance with international
standards.
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High-quality Materials for
Lasting Use
Special rules apply in our company concerning the selection of
appropriate materials: We only use materials and components which
meet the requirements of the market and which are certified by super-
visory authorities such as the DVGW (German Technical and Scientific
Association for Gas and Water) if necessary. We also set high standards:
Not only do the materials we use have to tolerate lasting contact with
water and other highly corrosive media, they also require special material
composition for intensive UV light or highly-reactive ozone treatment.
We ensure our quality requirement by manufacturing as many
components as possible ourselves. As such, Xylem is one of the few
manufacturers of UV equipment with its own UV lamp production.
Quality is relived each day
Beyond material quality, we rely on consistently high-quality standards
in all divisions of the company. Our active quality management system
is geared towards internationally applicable standards and now meets
the current standard DIN EN ISO 9001. Moreover, product quality and
manufacturing operations are constantly monitored and optimized
in continuous “kaizen” improvement processes. Established quality
controls give us and you the security of knowing that WEDECO UV and
Ozone systems will always operate reliably.
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Certifications Create
Confidence
In order to objectively support our quality statements, WEDECO equipment
is certified according to the highest standards whenever required, such as the
American UL standard for electronic components or the European pressure
equipment directive (97/23/EC). In regard to water disinfection with UV light,
we have even defined strict standards together with the German certification
body in Bonn, which today meet with the highest recognition worldwide as
DVGW certification (German Technical and Scientific Association for Gas and
Water).
The general rule is: If meeting a regulatory requirement is required for
permissible operation, there is always a WEDECO system which meets or
exceeds that requirement, rest assured.
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UV Technology
Disinfection with ultraviolet light
The use of chlorine, chlorine dioxide, hypochlorite and other
chemical substances to disinfect liquids can result in effects
which are detrimental to health and the environment. UV
technology is the better alternative to chlorine disinfection.
The intensively researched and technologically mature
disinfection method with ultraviolet light is adapted from the
natural action of sunlight.
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How UV Disinfection Works
Ultraviolet light is energy-rich light with a wavelength of 200 - 400
nanometres (nm). UV light is very versatile and can be used for disin-
fecting water, destroying harmful microorganisms in other liquids, on
surfaces, and in the air. The intensive UV-C radiation, most strongly
in the wavelength range of 254 nm, reaches the microorganisms and
impacts directly on their DNA.
By changing the DNA the cell division of the microorganism is inter-
rupted - it can no longer reproduce itself and thus loses its pathogenic
effect. With UV technology it is possible to destroy more than 99.99 %
of all pathogens within seconds, without the addition of chemicals,
without harmful side effects, inexpensively, highly efficiently and
absolutely reliably.
WEDECO UV systems are suited for the disinfection of drinking water,
process water, wastewater, salt water, ultrapure water and other trans-
lucent fluids, such as sugar syrup.
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WEDECO UV Lamp
Technology
We at Xylem recognized the potential of UV disinfection and the
associated lamp technology early on. Ever since, we have dedicated
a large portion of our research to further development. The core
of our work, which started more than 30 years ago, is the continual
improvement of the performance and economic efficiency of our
UV technology. The result has been a high-performance low-pressure
UV lamp which sets benchmarks.
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Long-life & Energy Efficiency
The special characteristics of the WEDECO UV lamp are its special doping
and the unique long-life coating. Because of these futures, a constantly high
UV light yield is achieved with a substantially extended lamp service life at
the same time. In addition, by using this technology it is not necessary to
apply liquid mercury inside the lamp.
WEDECO UV lamps cannot be surpassed economic efficiency. In relation
to expenditure of energy, the High-Intensity/Low-Pressure Technology
provides a light yield three times higher than comparable UV lamps of
widely used Medium Pressure Technology.
A higher light yield also means a lower heat generation at the same time.
Thanks to this, WEDECO UV lamps become less susceptible to varying
water temperatures. Even the formation of deposits on the quartz sleeves
as well as lamp aging is considerably lower than with alternative UV lamp
technologies.
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Ozone Technology
Ozone is one of the strongest industrially producible oxidizing
agents, and is commonly used for the treatment of water in
municipal and industrial applications. The special advantage
of Ozone is the environmentally friendly way in which it works.
Harmful substances, colors, odors and microorganisms are
destroyed directly by oxidation, without the formation of
harmful chlorinated by-products.
We at Xylem use this characteristic of Ozone with specially
developed technology in a variety of applications. Apart from
the treatment of drinking water and wastewater, our equip-
ment is used in bleaching processes, such as paper bleaching
as well as in other industrial oxidation processes.
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Hightech for the
Environment
Ozone (O3) consists of three oxygen atoms. Under normal near-earth
conditions its molecular structure is unstable and thus the gas becomes
very reactive. The Ozone molecule reacts quickly with a number of
organic and inorganic compounds, either through directly acting on the
Ozone molecule or indirectly through hydroxyl radicals that are created.
Ozone is usually consumed completely by this oxidation process and
decays back into oxygen. Any remaining Ozone in the off-gas is conver-
ted back to oxygen (O2) by a residual Ozone destructor.
We developed a compact technology for maximum Ozone generation
with exceptionally low operating costs: WEDECO Effizon® EVO. By
utilizing this technology, the production of large amounts of Ozone
also becomes extremely economical and absolutely safe for both the
environment and the operating personnel. The WEDECO Effizon® EVO
technology guarantees the highest performance and uncompromising
reliability at the lowest total cost.
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Effizon® EVO Technology
The Effizon® EVO electrode makes reliability possible like no
other system. These patented electrodes create Ozone according
to the principle of silent electrical discharge from oxygen or air.
A high voltage is applied between an grounded high-grade steel
pipe and an electrode fixed in it. The electrode and the grounded
tube are separated by a dielectric, which creates two discharge
gaps for the gas flow: both on the inside and the outside of the
dielectric. Some of the oxygen molecules in the feed gas break
down in the electric field and immediately attach themselves to
free oxygen molecules, forming Ozone.
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More Than Just Equipment
Construction
Our project engineers know what needs to be done. If necessary, all
important steps are planned, drawn, calculated and measured in advance
from the idea up to the installation onsite. Interdisciplinary teams develop
the projects together according to the focus. Although we specialize in
water treatment, we also offer extensive experience in diverse applica-
tions, such as Ozone oxidation in paper bleaching, in sewage sludge dis-
integration or for surface treatment. In addition to a high-level of training,
many years experience in international project management is our secret
to success.
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Aftermarket & Service
Around the WEDECO hardware you also acquire services
that provides you with assistance from day one to ensure
safe and efficient operation of your system. And you get this
for the entire life of your system.
Wherever you are located, you can always count on the
availability of WEDECO service. With a network of Xylem
subsidiaries and contractors in more than 140 countries all
over the world, the Xylem service and spare parts logistics
makes certain your WEDECO system is running smoothly in
no time at all.
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1976
Foundation of
the company
WEDECO.
1979 The
first low
pressure
high out-
put (Lo-Hi)
amalgam
lamp is
developed.
Milestones
The WEDECO success story began in 1975 with the formation of WEDECO
Gesellschaft für Entkeimungsanlagen mbH and the establishment of the first
small production facility in Herford, Germany. From the very beginning, the
company’s business policy was shaped by the vision of chemical-free and
environmentally friendly water treatment.
Over the years, WEDECO has become a fixture within the world of environ-
mentally friendly treatment of drinking water and wastewater with UV and
Ozone technology. Milestones of the company’s history are worldwide unique
large-scale projects and inventions which made UV disinfection and Ozone
oxidation an integral standard in the field of water treatment.
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1995 Development of the WEDECO Effizon® electrode.
This patented electrode significantly reduces the cost of
ozone generation by allowing substantially higher ozone
concentrations to be produced from smaller, more
cost-effective ozone generators.
2002 WEDECO develops the first high performance low pressure
UV lamp providing highly improved performance and efficiency.
Most efficient ozone systems worldwide is put into operation in
1992 - 1994 In order to use UV tech- Sao Paulo, Brazil. The system produces more than 360 tons of ozone for
nology in open wastewater channels, paper bleaching and thus supersedes 700 tons of chlorine - per month!
WEDECO engineers develop a daylight-
blind UV sensor, which allows smooth To date, the largest UV disinfection system for wastewater in the world
continuous operation of UV systems is started up in Manukao, New Zealand. The installed WEDECO TAK
in wastewater without special filter system disinfects 16,000 l of wastewater per second.
technology.
WEDECO develops an electronic ballast
for low pressure UV lamps. Performance 2006 Using the most advanced computer
is thus essentially optimized and energy simulations, the efficiency of UV disinfection
consumption is reduced. is further improved. Among other things, the
result is the development and patenting of the
CrossMix® module for optimizing the water
flow.
1988 A hexagonal ozone
electrode is developed, 2004 The brand 2011 On October 31, 2011
essentially improving the WEDECO becomes part ITT Water & Wastewater
ozone oxidation process. of ITT Industries. changed in Xylem Inc.
Wedeco becomes a Xylem
2001 WEDECO develops
brand.
the first multi-barrier system, a
system combining various
treatment processes.
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02 / 2012 · This brochure has been printed on chlorine-free paper
1) The tissue in plants that brings water upward from the roots
2) A leading global water technology company
We’re 12,000 people unified in a common purpose: creating innovative solutions to meet
our world’s 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,
longstanding 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
Boschstr. 4 - 14
32051 Herford, Germany
Phone +49 5221 930 0
Fax +49 5221 930 222
www.xyleminc.com
