11-1, Haneda Asashi-cho
Ohta-ku, Tokyo 144-8510, Japan
Visit our website at http:// www.ebara.co.jp
No. 1 Tuas Link 2, SINGAPORE 638550
Ebara products and technologies make your society
better in many ways.
Social section Life section
Products and technologies at work in cities, towns, and Products and technologies at work and in everyday
1 Hydroelectric 2 Water purification 3 Water sources 8
generation plants 4 plants 6
9 Wind power generation A Cooling towers 24 B Ventilation fans 25
C Flat-screen TVs 26
D PCs 28
F Water supply/drainage
10 Solar power generation
4 Tunnels 10 5 Rainwater drainage 6 Facilities for
facilities 12 agricultural water 14
E Cooling systems 30 Glossary 34, 35
7 Sewage treatment 8 Waste disposal
plants 16 facilities 18
Social section 1: Hydroelectric generation plants
"How is electricity generated from water?"
Hydroelectric generation produces electricity by applying the power of Hydroelectric generation produces electrical energy by harnessing the
water stored in dams, which are built by closing off rivers in mountain power of water moving through levels of elevation to turn water turbines,
areas. This is suitable for Japan, with its mountains and rain. How do and this system has been recognized as a clean energy system with no use
such systems generate electricity? of fossil fuel*1. Currently, hydroelectric generation, at sites ranging from
large generation plants in dams to small facilities in rivers, accounts for
about 1/10 of all power generated in Japan. Ebara water turbines are at
work in those places.
Francis water turbine
Water turbine types Small-scale hydroelectric generation
Francis water turbines (photo above); Small-scale hydroelectric generation utilizing
Francis, Propeller (Kaplan, Tubular) and Pelton rivers, streams and agricultural channels is also
turbine types are suitable for hydroelectric attracting attention, as well as large-scale
generation, according to conditions of volume hydroelectric generation using dams.
and head of water.
Social section 2: Water purification plants
"How does river water become drinking water ?"
Water service is essential to everyday living. We take it for granted that Tap water comes from a water purification plant, where river water and
clean water is always available at a mere turn of the tap. How is tap water ground water are pumped up. Then, that water is purified at treatment
made and supplied? facilities into safe, clean drinking water. More advanced treatment makes
the water more palatable. Finally, the tap water is supplied to tapping
points. Ebara's various water treatment technologies and products,
including pumps, are used throughout the entire process from intake, to
treatment, to supply of water.
Water supply overview
Water Pre- Coagulation
Filtration Sterilization Supply
sources treatment sedimentation
facilities facilities water
Drainage/ Sludge Resources
<Water purification plants and water supply>
Water purification plant equipment and devices Advanced water purification treatment system
A wide range of equipment, including pumps This water purification treatment system
for intake/supply, agitation mixers, membrane combines bio-treatment, ozone treatment and
filtration devices, activated carbon filters, sludge activated carbon treatment to eliminate
dehydration devices, drying devices, and the trihalomethane precursors*2, chromas, and
central monitoring/control system that controls ammoniac nitrogen, which conventional water
the devices above. purification treatment technology cannot do.
Social section 3: Water sources (Purification of water environment)
"What if lake water becomes polluted?"
Japan used to be full of beautiful water and nature, but economic The aqueous environment of seas, rivers, and lakes provide us with food
development depleted fresh water and degraded the environment. What and hydration. However, this environment is suffering contamination as
is being done to protect the environment and its water resources? life proliferates beyond nature's capacity to restore itself, industry spews
waste into waters, and water flows stagnate. Ebara's development of
water purification, circulation, anti-pollution and other technologies are
going far to strengthen protection of precious water resources.
Water power compressor for water purification
<Water environment purification>
Odaiba sea area purification River basin water recycling technology
Odaiba Kaihin Koen (Odaiba Seaside Park) in For more efficient use of water resources in
Tokyo attracts tourists from throughout Japan. consideration of the overall river basin
Consequently, its water quality is worsening, so environment, this technology is used to protect
Ebara is working with the metropolitan govern- water sources upstream of the river, purify mid-
ment on purification experiments in order to stream water for agricultural use, and treat
help seaside recreation there exert less drainage water downstream for use as
environmental impact. moderate quality water*3.
Social section 4: Tunnels
"How are tunnels ventilated?"
Many long tunnels in Japan run through the mountains or under the sea. Driving a car in a tunnel causes accumulation of harmful substances such
Heavy traffic goes through the tunnels, polluting the air in them. What as smoke from exhaust gas and carbon dioxide. It is difficult to ventilate
kind of technology can improve this situation? tunnels naturally, so fans are used to do the job. The cylinder-shaped
machine on a tunnel ceiling is called a "jet-fan". Also, a long tunnel like
that of the Tokyo Bay Aqua Line (Trans-Tokyo Bay Highway) has
ventilating towers employing large fans. Ebara fans of such types work to
ventilate air and maintain safe driving environments.
Jet-fan for tunnel ventilation
Role of tunnel ventilation facilities Types of tunnel ventilation facilities
Ensuring a safe environment for drivers and The jet-fan type (photo above) is the tunnel
passengers in long tunnels across Japan ventilation facility most widely used. Some of
requires ample ventilation, using fans strong these are as large as nearly 4 meters in
enough to discharge fumes from driving and in diameter and operate hidden from the view of
case of fire. tunnel users.
Social section 5: Rainwater drainage facilities
"What are pumps for on rainy days?"
Rainy season, typhoon season and other times of heavy rain raise Narrow streams, channels, side ditches, and drain pipes may overflow
concerns about flooding. Rainwater pumps in various locations work unless rainwater is diverted to rivers or the sea. Various pumps are used
reliably on such occasions. What are these pumps for? for such purposes to drain rainwater forcibly away to rivers and sea,
thereby preventing flooding and damage. After heavy rain, pumps work
out of view of most people to prevent channels, side ditches and roads
from flooding with water. When it rains, Ebara's pumps work hard
behind the scenes to protect lives from disruptions that floods can cause.
Rainwater pump (Horizontal mixed-flow pump)
Large-scale underground watercourse river water levels rise due to typhoons, etc. in
(Shutoken Gaikaku Hosuiro/Metropolitan area the area, rainwater enters the watercourse from
groundwater drainage canal) four leveling pegs and drains into the Edo River
For quicker drainage than a conventional open through a drainage station.
channel system is capable of, Shutoken Gaikaku
Hosuiro, a large underground watercourse Ebara's enormous pump
about 6.3km long and 10m wide, was completed Ebara produces four of the world's largest
in June 2006, running approx. 50m beneath pumps, capable of discharging 50m3/sec. and
Route 16, from Obuchi, Kasukabe City, Saitama 10,300kW of engine power for the Shutoken
Pref. to Showa municipal drainage station. If Gaikaku Hosuiro.
Social section 6: Facilities for agricultural water
"How can water flow to rice fields far from rive rs?"
Water is essential to agriculture. Rice farming, upon which Asian diets are Not all rice paddies and fields have enough access to water, so pumps go
based, particularly requires a lot of water. What has been done to supply a long way toward distributing water from rivers and wells to faraway
enough water consistently throughout various areas? fields. During soil puddling season, when the fields are filled with water,
pumps are often required to operate 24 hours a day. Ebara's pumps
reliably deliver the behind-the-scenes support needed to grow rice,
vegetables and fruits.
Multistage centrifugal pump
<Agricultural water pumps>
Agricultural water pumps Agricultural drainage pumps
For supplying water to fields, centrifugal pumps Agricultural drainage pumps are placed in
are mainly used. For pumping water from wells, drainage pump stations near rivers and irriga-
submersible pumps are used. tion canals to protect fields from typhoons and
Ebara pumps support farming in Japan and floods. Centrifugal, mixed-flow, axial-flow
throughout the world. pumps for large flow and low head, and vari-
able vane axial flow pumps draining effectively
for a wide range of water levels are available.
Ebara produced a large low head centrifugal
pump as far back as 1924, for reclamation work
on the Ida River in Fukushima prefecture.
Social section 7: Sewage treatment plants
"Where does used, dirty water go?"
Every day, tremendous volumes of water used for cooking, washing, Ebara technology is put to versatile use for sewage treatment. Sewage
bathing, showering and toilets go to sewage treatment plants through water is sent to treatment plants, processed to meet water quality
sewage lines. What technology is used to clean the water? standards and released to rivers and seas. Some of these plants treat the
water by processing it into intermediate
water for reuse, or use heat pumps*4 for
district-level air conditioning by exploiting
the differences in temperature between
sewage water and outside air. Also, sludge
developed in the process of sewage
treatment is recycled*5 for use as energy.
Sewage treatment facilities overview Sewage treatment plant
Water treatment system
Grit chamber Disinfection Water
facilities facilities release
Sludge treatment system
<Sewage water treatment>
Equipment and devices used in sewage treat- District air conditioning system
ment facilities The temperature of sewage does not change
For treating water at sewage plants, Ebara much throughout the year (around 10ºC), so it
produces devices for grit chambers; biological can be used as a coolant in summer when
phosphorus removal processing; ultraviolet outside temperature is high, and as a heat
disinfection; sludge treatment equipment such source in winter when outside temperature is
as concentration-type quality control tanks; low. Ebara heat pumps optimize this capability.
centrifugal concentration/dehydration; and
mechanical equipment for fluidized-bed
incinerators, sewage pumps, rainwater pumps
and aeration blowers.
Social section 8: Waste disposal facilities
"Is waste simply burned?"
Generally, on average, a person disposes of about 1kg of waste per day. First, waste from residences and offices is gathered for removal to waste
However, almost all waste from residences and offices to be incinerated is disposal facilities, where it is thrown into incinerators containing devices
not merely burned. What process does this involve? designed to reduce incinerated ash volume, extract metals for recycling,
and produce gas emissions free of dioxin*6. The waste is not just burned; it
is used to generate recyclable waste and eco-cement*7. Ebara's
technologies are used throughout this process.
Waste disposal facilities using fluidized
bed gasification and ash melting system.
<Waste disposal facilities>
Types of incineration system completely. Recovers energy, metals and other
Incineration systems do more than just burn valuable resources from waste.
waste. Here are some examples. <Fluidized-bed gasification and ash melting sys-
<Stoker-type incineration system> Treats tem> Gasifies all kinds of waste, and uses the
wastes ranging from household waste to high- generated energy to render heavy metals harm-
calorie waste. Combines systems compatible less by making liquid slag of ash. High
with high-efficiency power generation and temperature combustion process completely
efficient use of ash. decomposes dioxin. Recovered slag can be
<Fluidized-bed incineration system> Cleanly reused for roadbed material and sidewalk
treats all kinds of waste, including blocks.
excreta/sewage sludge, paper, plastic, refuse,
glass, metals and old tires. Burns at
temperatures high enough to decompose dioxin
Social section 9: Wind power generation plants
"How can wind be converted into electricity?"
Wind power generation is coming to the forefront of public Like hydroelectric generation, wind power generation attracts attention
consciousness, as it is the most widespread clean energy source in the because it harnesses a clean, natural source of energy*8, unlike fossil fuels.
world. What kind of system is this? Many huge windmills ranging in height from dozens of meters to
hundreds of meters are situated in windy locations such as coastline,
mountain, and hill districts, and generate electricity via wind-turbine
rotation. A pioneer in this field, Ebara paves the way toward more
widespread use of wind power generation technology.
Wind farm with a lineup of wind-power generators
<Wind power generation>
Wind turbines and wind conditions Current wind power generation status
Wind condition research aims to establish the Wind power generation is most prevalent in
best locations for wind turbine installation by Europe, particularly Germany, followed by the
determining the frequency, strength and dura- United States, then India. The world's wind
tion of wind in each location being considered. power generation totals about 50 million kW. Of
Japan's portion of that production of about one
million kW, Ebara contributes about 110
Social section 10: Solar power generation plants
"How does solar power generate electricity?"
The sun nurtures life in abundance. The sun's energy is virtually Solar power generation involves direct conversion of light into electricity
limitless, making solar energy generation the ultimate power supply by solar battery using semiconductors such as silicon. Solar power is
system. How, then, is solar power used as energy? clean energy, so it helps to conserve resources such as fossil fuels, and
limits CO2 emission. Furthermore, a solar power generation system can be
placed on a rooftop or wall of a house or other building, and is easy to
maintain. Ebara offers optimal systems, according to installation location
and use: our originally developed power conditioners.
Solar battery panel
<Solar power generation>
Solar power generation mechanism Solar power generation applications
A solar battery made of special silicon uses Solar power generation is flexibly used to
sunlight to generate DC electricity. The collected develop solar power lighting systems connected
electricity is converted to AC electricity by a to general power systems, emergency power
power conditioner, for use in facilities and sources (rechargeable battery backup) and
households. Excess electricity can be sold to independent power sources for fountains and
electric power companies. irrigation.
Life section A: Cooling towers Life section B: Ventilation fans
"How does a building's air conditioning "How does air ventilate through buildings
cooling water cool down?" with unopened windows?"
Have you seen a cooling tower on a building rooftop? It cools down Buildings and underground malls are always comfortably air-conditioned
cooling water used in the building's air conditioning system. What is the throughout the year, especially considering that building heights are
purpose of a cooling tower in an obscure location and how does it make increasing and few, if any, of their windows open. How does air ventilate
people in a building more comfortable? in such closed spaces?
Facilities such as large air conditioners used in buildings are sometimes
cooled down by water. This water warms up after such use, so the cooling In buildings in which natural ventilation is
tower allows it to cool down for re-use, upon contact with outside air weak, fans ventilate by bringing in
blown in by fan. Ebara cooling towers work on building rooftops to external air through air ducts and
protect cooling water from harsh external distributing it throughout the facilities.
environments. And used air is discharged by fans
through exhaust air ducts out of the build-
ings. In this way, by using Ebara fans,
facilities can breathe in a similar way to
Single suction multi-blade fan
Square, cross-flow type cooling tower
Life section C: Flat-screen TVs (vacuum equipment)
"What do thin TVs have to do with clean air?"
Thin TVs are becoming more popular. Did you know that a process of The LCD*10 screen of a thin-type TV is manufactured by a process that
ultrafine manufacturing down to the level of mere micrometers*9 is coats a sheet of glass that is over 2 meters long per side. This occurs
required to put such big, beautiful, dynamic images on display? Here is
how Ebara technology contributes to such manufacturing. within a high-vacuum*11 chamber to keep levels of impurities (including
airborne dust, dirt and particles too small for the naked eye to see) as
close to zero as possible. Ebara's dry vacuum pumps are used to keep
such environments clean.
Dry vacuum pump
What is a vacuum? Ebara vacuum pumps
If the pressure of a place is "1", a place where Ebara's high-quality, high-performance vacuum
pressure is under 1 is a vacuum. However, the pumps include a compact, energy-saving dry
required vacuum level for semiconductor/LCD vacuum pump series and large-capacity, highly
manufacturing is as high as 1/one millon. Even corrosion-resistant turbo-molecular pumps for
higher vacuum levels are needed for air exhaustion.
microfabrication to advance.
Life section D: PCs (Semiconductor manufacturing devices)
"What do semiconductors have to do with Ebara technology?"
PCs, which have become essential for work, study and leisure, integrate Ebara technology contributes to the manufacture of semiconductors used
state-of-the-art semiconductor manufacturing. How does Ebara support in personal computers, gaming machines, mobile phones, and digital
semiconductor manufacturing? consumer appliances that society relies upon. This manufacturing
requires cutting-edge technology, as electronic semiconductor circuits are
microfabricated at the nano*12 level. As a system manufacturer, Ebara is
thereby essential to the process of making these semiconductors that have
become so indispensable to our lives.
<Semiconductor manufacturing devices>
Ebara semiconductor manufacturing devices <Bevel polishing device> This device polishes
These products support micrometer- and and washes, cleaning minute particles from
nanometer-level precision required in cascade screen separation of wafer edges,
semiconductor manufacturing. residues and scratches.
<CMP device> Essential for next-generation <Exhaust gas treatment device> Various gases
semiconductor manufacturing, Ebara's CMP are used for semiconductor manufacturing.
device grinds the irregular surface of a wafer*13 Exhaust gas treatment requires sufficiently high
flat, chemically and mechanically. This security to eliminate toxic substances. To suit
advanced system also has washing and drying various processes, Ebara offers combustion-
capability. type, catalytic-type, wet-type, and dry-type
exhaust gas treatment devices.
Life section E: Cooling systems
"What are air-conditioning systems like for large facilities?"
It's easy to imagine air conditioning for a residence having indoor and In large facilities like cinemas, gymnasiums, underground malls and
outdoor components. But it is not as easy to envision air conditioning buildings, cooling and heating machines (chiller-heater) are used for air-
conditioning. When there are heat sources like boilers and engines,
systems for big sites like public facilities, buildings, and shopping malls. chillers are used for air-cooling. Meanwhile, using midnight power, ice
There, too, Ebara technology is working. thermal storage tanks make ice, which becomes a heat source that can
help peak-cut*14 of electricity/thermal daytime loads and thus it reduce
global environmental loads. Ebara air-conditioning equipment makes a
space comfortable with great efficiency.
Direct-fired absorption chiller-heater
Cooling technology and water sprinkling Ebara's refrigerating machines
On summer evenings, water sprinkled in A leading refrigeration manufacturer, Ebara
gardens and near building entrances has a produced Japan's first centrifugal chillers, and
cooling effect, because water absorbs ground also makes absorption chillers, screw chillers
heat and evaporates. This is similar to how and ice thermal storage systems.
cooling systems work.
Life section F: Water supply/drainage pumps
"What kinds of pumps are used in tall buildings?"
Even very tall buildings are supplied with water and proper drainage on According to local government regulations, commercial and residential
every floor. What kind of water supply and drainage systems are used in buildings having more than a certain number of floors require pumps to
such buildings? Ebara's pumps at work there provide the answers. supply tap water throughout the buildings. Also at work are fire pumps,
pumps to send water from a water-purifier tank to drains, pumps to use
rainwater for fountains and toilets, and rainwater drainage pumps. You
may not know it, but Ebara pumps are probably at work nearby.
Water supply pump unit for tall buildings Fire pump unit
<Water supply/drainage pumps>
Water supply pump unit for tall buildings Fire pump unit
The product shown above is a water supply A pressurized water supply device conforming
pump unit designed for buildings from 80 to 250 to Fire Defense Law and authorized by the Fire
meters in height. It conforms to the Water Protection Equipment and Safety Center of
Works Law in Japan and ensures the safety of Japan. This compact, light, big-bore diameter
drinking water. A backup function is available to unit can be connected to a fire hydrant and
ensure a stable supply of water at all times. sprinkler.
Social section Life section
*1 Fossil fuels: neous uses like flushing *6 Dioxin: *9 Micrometer: 1/million, and around *15 Sustainable:
These are derived from toilets, sprinkling and so on. A colloquial term for poly- This unit of length equals 36,000km high above the Capable of being sustained in
organic matter — plant and Moderate quality water is chlorinated dibenzo-p-dioxin. 1/million meter or 1/1000 earth's surface, where fixed such a way that social and
animal remains — metamor- recycled wastewater from This compound is highly millimeter. For reference, a satellites are situated, the economic growth and
phosed by heat and ground rainwater and sewage water toxic, difficult to decompose, hair is about 80 micrometers pressure is 1/10 billion. resource development can be
pressure and accumulated through purification treat- causes skin and visceral dis- thick. maintained without harm to
over the ages in geological ment and it means more effi- orders, has teratogenic *12 Nanometer: the environment.
deposits, such as for coal and cient use of resources. potential and increases risk of A unit of length equal to 1/bil- [Sustainable development]
*10 LCD (Liquid crystal
oil. In other words, these are cancer. It is in urban waste lion meter, or 1/million mil- A concept to promote social
forms of ancient solar energy *4 Heat pump: incinerated ash, paper mak- limeter, or 1/1000 microme- development without com-
A display device using liquid
stored in organisms. Use of A device that transmits heat ing sludge, and vehicle ter. promising the environment
crystal. A special liquid is
fossil fuels increases CO2 lev- from low-temperature objects exhaust gases encapsulated between two and well-being of future gen-
els. to high-temperature objects . glass plates, and voltage is *13 Wafer: erations. First proposed by
via heat absorption/genera- *7 Eco-cement: applied to the liquid, which This is usually a round, thin the U.N. World Commission
*2 Trihalomethane tion of refrigerant. Heat plate of 20-30cm diameter, on Environment and
A new, recycling-type cement changes the direction of liq-
precursors: Development in 1987.
pumps using underground made of a mixture of urban uid crystal molecules to vari- sliced 0.5mm thick. The sin-
Trihalomethane is a group of
water, air and ground heat, waste incinerated ash and ous degrees, generating gle crystal cylinder from
organohalogen compounds *16 Recycling-oriented
respectively, are available. dried sewage sludge. image displays by raising and which it is sliced is made of
generated by chlorination of society:
Currently, it is selected as a lowering light transmission silicon that is 99.999999999%
water. Chloroform, a major A society that aims at zero
*5 Sludge recycling: "Specific procurement item" levels. pure. Microscopic electrical
substance of this kind, is said waste emissions by promot-
Inorganic sludge can be according to the Law on circuits are formed on that
to raise the risk of cancer. ing recycling and reuse to
recycled into gardening soil, Promoting Green Purchasing. plate, which becomes a base
Trihalomethane precursors *11 High vacuum:
of various semiconductors. curb the use of new
are organic matter and material for civil engineering If the atmospheric pressure is
resources. It replaces the cur-
ammonia that can be trans- projects, and stone bulking *8 Natural energy: "1", a vacuum exists where
rent practices of mass pro-
formed into those com- fillers, and organic sludge can Energies such as solar power, the pressure is less than 1. *14 Peak-cut:
duction, consumption and
pounds. be recycled, mainly for recov- wind power, hydropower, Pressure from 1 to 1/1000 is Peak-cut minimizes peaking
discarding. In Japan, the
ery of methane gas and com- ground heat, and tidal ener- called low vacuum, to 1/mil- of electricity load in order to
Basic Law for Establishing a
*3 Moderate quality post (sewage sludge ferment- gy. This category does not lion is called medium vacu- reduce loads imposed on
Recycling-Based Society was
water: ed fertilizer). include limited types of ener- um, and to 1/10 billion is power generating facilities. A
enacted in 2000.
The system supplies moder- gy that can destroy and pol- called high vacuum. Around year's peak electrical power is
ate quality water for miscella- lute nature, like fossil fuels. 40km above the ground supposedly achieved at 14:00
where space shuttles orbit is on midsummer afternoons. ● This glossary was compiled using Sanseido's
Daijirin Japanese Dictionary, 2nd ed., etc.
Ebara started with pumps expertise, which has grown from pumps, to
Since its origins in 1912, our company cooling/heating and water treatment, to
produced Japan’s first Inokuchi-type pump, vacuum and semiconductor devices. In
and started an Inokuchi-type machinery developing these technologies,
operation. In 1920, Ebara Corporation was Ebara supports a sustainable*15
founded to manufacture and sell pumps. As society that values recycling*16.
Ebara expanded on a global scale, so did its