EEnvironment

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We are positively engaged in technological development that contributes to environmental preservation and reducing environmental
burdens, while promoting the active use of natural energy sources and the development and introduction of energy-saving and energycreation technologies.

Contributing to water and environmental infrastructure
through business

Treatment processes and technology for water and sewage treatment plants
Ozone technology

Water treatment plants
Water

The environment surrounding water changes daily, and challenges
vary by country and region. In recent years, environmental destruction

Water treatment technology
Water intake
facilitycaused by plastic waste has also become a major problem.
Beginning from the era of our founding companies NGK Insulators,
Ltd. and Fuji Electric Co., Ltd., the METAWATER Group has been

Rivercompanies. Since then, changes in the natural environment havebeen intensifying and accelerating, including global warming, climatechange, and frequent wind and flood damage.
As a company supporting water and environmental infrastructure,
the METAWATER Group will continue to focus on the technologicaldevelopment required by the times.

Chemicalmixing tank

Sedimentation
tank

Adjust waterMix in flocculant
level and volume

Sink and separate
lump sand and soil

Sterilize

Store purified
waterStore water tosend to homes

Advanced wastewater
treatment equipment

Filtration
tank

Disinfection
systemFiltrate
tank

Water
distribution tankThickening
systemDehydrator

SludgeReduce moisture indischarge sludge discharge

Supplywater

Reuse as horticulturalsoil and cement

To town

Squeeze out
more moisture

Maintenance and operations management for water and sewage facilities

Sewagetreatment plants

Development facility

Filter andclean water

Discharge

Water treatment technology
Sterilize and disinfectwith chlorine, etc.

Sink clumps ofmicroorganisms

Decompose dirt throughthe work of microorganisms

Sink minutewaste

Sink andremove sand and waste

Disinfection
tank

Final
sedimentation tank

Aerationtank

Primary
sedimentation tankGritchamber

Disposalandeffective use

Facilities for productionof fuel from sludge
Incinerate

Sludgedehydration technology
Sludgedehydrator

Digestionequipment

Further compact
Reduces the amountthe moistureof sludge andinto a semi-solid state
extracts biogas

Wastewater

Waste recycling
facilities

SludgeThermal manipulation
technology

To sewage treatment
plant through sewer pipes

Resource
environment technology

Sludgethickener

METAWATER Group’s ESG

engaged in various technological development for over 50 years as acompany supporting water and environmental infrastructure.
We were established in 2008, adopting the genes of both thoseReceivingtankCatch colors and smells

Separation and recycling of plastics,incombustible materials, etc.

Reduce moisturein sludge

Changes in the development of new technology (2007 to present)
METAWATER established2007

TechnologyWater
treatment plants(Year)

2008

2009

2010

2011

Development of new technology through electromechanical fusion
Japan's first PFI
Kawai Purification Plant

Water purification technology

2012

2013

2014

2015

Development of new technologies for reuse and recycling of resources, as well as higher functionality
First delivery ofUV disinfection equipment

2019

First delivery of mobile Ceramic
Membrane Filtration Equipment

First delivery of LED UV disinfection equipment
First delivery of RB flash mixer for water treatment plants

Began verification ofsewage reuse system

Developed glass lining typeozone generation tubes

Developed high air-concentration both side cooling ozone generation tubes
First delivery of new diffuser plate for ozone

Water treatment technologyFirst delivery of high-speed sewage
treatment systems for wet weather

First delivery of multi-wing vertical-axis agitator
First delivery of sewage water reuse system

Pre-treated Trickling Filtration (PTF)
High-speed filtration technology using floating media
Simultaneous nitrification and denitrification treatment (deep tank type)

Thermal manipulation technology
B-DASH Project*(Breakthrough by Dynamic. Approachin Sewage High Technology projectby Ministry of Land, Infrastructure,
Transport and Tourism)

Waste recycling
facilities

2018

Ozone technology

Sludge dehydration technology(sewage field)

2017

Development of technologies to respond to climate change and the environment(water supply field)

Sewagetreatment plants

2016

Phosphorus recovery fromincinerator ash (2006)

First delivery of high performance digester mixer
First delivery of post-injection dual-liquid type belt press dehydrator

First delivery of multi-layer fluidized incinerator

First delivery of fluidized carbonizing furnace
Delivery of world's first gasification furnace[FY2011] Energy management system using intensive
solid-liquid separation technology

Resource environment technology

Joint research into circulation-type multi-layer incineration
First delivery of kiln type (external heat) carbonizing furnaceFirst delivery of dual heat source binary generator[FY2013] Innovative wastewater sludge energy conversion system that
optimizes overall dehydration, combustion, and power generation[FY2014] Non-aeration circulationwater treatment technology[FY2019] Advanced treatment technology through ICT and AI
control of single tank nitrification and denitrification process[FY2017] Technology increasing the processing capacityof final sedimentation tanks[FY2015] Water management technologies for urban areas subjected to local downpoursFirst delivery of waste plastic
specific gravity difference sorter*B-DASH Project Abbreviation of Breakthrough by Dynamic Approach in Sewage High Technology Project. By accelerating research, development and commercialization of new technologies, efficiency of energy use

First delivery of new countercurrent trommel sorter

First delivery of improved counter-current trommel sorter
First delivery of compact high-speed rotary vertical crusher

and reduction of life cycle costs in the wastewater business are promoted. It is a demonstration project that has been implemented by MLIT since FY2011 to support overseas development of the water business. Consignees

installed a full-scale plant in their sewage treatment plants and demonstrated cost reductions, reductions in greenhouse gas emissions, etc.

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EEnvironment

トップメッセージ

Main environmental technology
Water purification technology

Safe water purification system effective even in the face of climate change

Water treatment technology

Water treatment systems that reduce river and sea pollution in wet weather

High speed CSO filtration system

Our Ceramic Membrane Filtration System boasts the No. 1 market share in Japan forwater treatment plants utilizing membrane filtration systems. The risk of membrane
breakage is extremely low, it can be installed in small spaces, and it can also remove
protozoa, allowing for safe filtered water.
Thanks to its exceptionally long life, there is a minimal frequency of membrane
replacement. In fact, the first unit of this system was delivered over 20 years ago,
and it continues to operate to this day without having had the ceramic membrane
replaced yet. Additionally, it is expected to be used as ceramic materials after use,
leading to a significant reduction in waste.
Finally, only a low amount of pressure is required to filter raw water, and filtration
using differences in water level is possible as well, reducing the power needed bypumps, etc., and saving energy.

Combined sewer systems discharge simply treated wastewater anduntreated sewage into public waters such as rivers when it rains, which
adversely affects the quality of water and public health. As such, withthe 2004 amendment of the Sewerage Act enforcement order, measures
to improve combined overflows are being promoted throughout thecountry. This includes the start of the "combined sewer system urgent
improvement project", which has the aims of (1) reducing pollutant loads,(2) ensuring public health and safety, and (3) reducing refuse.
This system filters simply treated water and untreated sewage at highspeeds using our uniquely developed special small filter, which is only
about 7.5 mm. By installing it in the primary sedimentation tank of asewage treatment plant or relay lift station, it can filter out floatable
solids and pollutants such as oil balls and plastics at a rate of up to 1,000m/day.
Additionally, existing primary sedimentation tanks can be remodeled
and set. Since it is easy to operate and maintain, it has been adopted as
one measure for improving combined overflow in Japan, contributing toenvironmental conservation measures regarding public water areas.

■ <Delivery results> Volume of water processed (cumulative)■ Japan(m3/day)

1,200,000■ Overseas

1,000,000

Special filter medium■ <Delivery results> Design treated water volume (cumulative)(m3/day)

6,000,000
5,000,000
4,000,000
3,000,000

METAWATER Group’s ESG

Ceramic Membrane Filtration System

2,000,000
1,000,000

800,000
0600,0002015

2016

2017

2018

2019
(Year)

400,000
200,000
0

Water treatment technology
20152016

2017

2018

System with the No. 1 market share, featuring significantly reduced power consumption

2019(Year)

Ceramic membrane

A mobile water treatment plant that is also active in times of disaster
Mobile Ceramic Membrane Filtration Equipment
This simplified Ceramic Membrane Filtration System, mounted on a truck, is easy
to operate and maintain. Since it is mobile, it can be operated even in areas where
there are no skilled engineers. In areas that do not yet have water piping laid,
the truck can be moved to various water sources, such as lakes, rivers, and wells,
allowing that water to be processed and used as safe drinking water.
Water transferred using piping requires a lot of energy, but since this system canmove on its own, it contributes to a reduction in transportation energy.
The system can also be used in the event of a disaster such as anearthquake or heavy rain, thanks to the features of the ceramic
membrane that enables stable filtration of even high turbidity rawwater.

High integration configuration air diffusion system
The sewer system collecting and treating domestic wastewater uses
0.7% of Japan's total electricity consumption (equivalent to the annual
electricity consumption of 2.11 million households). Approximately 50%of this is electricity used to treat sewage inside wastewater treatment
plants. When treating wastewater, microorganisms decompose thepollutants in the sewage, and the microorganisms then sink together
with the fine impurities to remove the pollutants. A large amount of air
needs to be blown (diffused) into the wastewater in order to activate themicroorganisms.
METAWATER has developed a system capable of diffusing ultra-fine
air by applying ceramic technology, achieving a high oxygen transfer
efficiency. In addition, by reducing the pressure loss when air is blown,
the amount of power required can be reduced by about 30% compared tothe conventional system.
The system is maintenance-free and has long-lasting performance,
earning it the No. 1 market share in Japan.

■ <Delivery results> Target water volume (cumulative)(m3/day)

4,000,000
3,500,000
3,000,000
2,500,000
2,000,000
1,500,000
1,000,000

Mobile Ceramic Membrane Filtration
Equipment

500,00002015

20162017

20182019(Year)

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EEnvironment

トップメッセージ

Main environmental technology

Thermal manipulation technology

Activities for reducing environmental burdens
Promoting energy-saving measures

Thermal manipulation technology that converts waste into fuelWastewater sludge fuel system

METAWATER has set a goal of “a 1% reduction compared to the■ Power usage (office)previous year” with regard to office power consumption and is actively
implementing office lighting reduction activities.

4,000(t CO2)

3,777

Various initiatives are being explored to reduce the amount of electricity
off when employees step away from their desk (energy-saving andsecurity measures), and in addition to work-style reforms (introduction ofWastewatersludge fuela 4-day workweek, telecommuting, etc.), there are also "Super Refresh

800

2,223

3,402
2,100

1,866

2,000

1,900

1,742

1,700

As a result, our electricity usage in FY2019 decreased by 5.0% compared0

to the previous year, and CO2 emissions were also reduced by 4.7%.

20152016

2018

2017

1,500
2019 (Year)

Promoting paperless work environment and purchasing eco-friendly items

600

Since FY2013, METAWATER has abolished the paper-based distribution of meeting materials at executive meetings, instead shifting to the use

400of tablets to view materials. This meeting format has already been introduced at other general meetings, as we continue our work to achieve a2000

METAWATER Group’s ESG(t /day)

3,582

1,000

lights are turned off.

1,000

2,300

3,644

1,834

Days", where employees are asked to leave at a specific time and all the■ <Delivery results> Treated capacity (cumulative)

3,000

2,187

3,787

CO2 conversion

used. Lights are turned off during the lunch break, PC monitors are turnedPower usage

As a general rule, sewage sludge in urban areas is dehydrated to reduce
the amount of moisture present and then incinerated. The ash generated
from the incineration is effectively used as a raw material for cement, etc.
METAWATER's "wastewater sludge fuel system" is a technology that
produces fuel (carbon) by steaming and incinerating sewage sludge. The
fuel produced is valuable and can be sold, and is effectively used as analternative fuel source to coal in thermal power plants, etc.
There are high expectations for wastewater sludge fuel to be a neweffective use of sewage sludge.

■ Power usage ● CO2 conversion(1,000 kWh)paperless work environment throughout the company. At the same time, we are promoting green purchasing of office supplies, and nearly 100%
2015

2016

2017

2018

of the paper we use internally is certified by the Forest Stewardship Council.

2019(Year)

Initiatives regarding industrial waste
Resource environment technology

Improved plastic sorting efficiency and accuracy

Although the amount of industrial waste generated by our business(by type <within Japan>)

activities (office and domestic construction work) varies depending on theDomestic waste recycling system

type of construction work and the number of projects undertaken each

■ Rubblefiscal year, a certain amount of waste is generated due to the nature of(t) ■ Metal scrap

25,000■ Sludge■ Mixed waste, etc.

■ Waste plastics■ Scrap glass, etc.

■ Wood scrap■ Otherthe business. To fulfill our responsibilities as a producer of waste, we are20,000

strengthening our management of industrial waste processing throughongoing departmental education, working to ensure that industrial waste
is properly disposed of.
In addition, in order to promote the reuse of the industrial waste that has

18,314

17,33015,707
Emissions

The amount of waste plastics generated in Japan is said to be over
9 million tons a year, accounting for approx. 2% of all waste. Waste
plastics are subject to import restrictions by countries such as China, andmarine pollution, etc., caused by microplastics has attracted attention
as a major social and environmental problem. In addition to reducing
emissions, the importance of recycling resources is also becoming more
important. However, in order to recycle waste plastics, in addition to themanual removal of refuse required, lightweight items such as plastic
bags, and heavy items such as detergent bottles, need to be separated.
For many years, the METAWATER Group has been developing equipmentthat improves efficiency and accuracy in manual sorting work by utilizing
differences in specific gravity in order to improve the recycling rate ofplastics.
Since the risk of explosions or fires caused by contamination of items
such as spray cans and lithium batteries is increasing at crushing andsorting facilities, we are also contributing to facility safety through thedevelopment of a system that prevents the spread of fires, detecting andextinguishing them quickly in the event of an accident. As of FY2019,
approximately 300 of our domestic waste recycling systems have beendelivered.

■ Changes in industrial waste emissions

15,00011,7789,851

10,000been created, we outsource the disposal to industrial waste treatmentcompanies that have recycling facilities. The recycling rate of the5,000

industrial waste that we primarily create, such as debris, sludge, and■ <Delivery results> Treated capacity (cumulative)

mixed waste, is 95.3%.

02015

2016

2017

2018

2019 (Year)(t/5H)

600

450

Promoting the adoption of electronic manifests

300

By selecting companies that support electronic manifests, we are, as a producer of waste, making the status of industrial waste processing
visible, and continually strengthening monitoring through an advance application for the use of a paper-based manifest. Depending on localconditions, in some cases we had to use a company only handling paper manifests. However, in FY2019, the adoption rate was 97.3%, only a 1.0%

150

decrease from the previous year, allowing us to maintain a similar level of adoption (nationwide adoption rate of electronic manifests: 63%). We
02015

2016

2017

2018

will continue working to increase the adoption rate of electronic manifests while paying attention to local conditions.

2019(Year)

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