“Model of New Water Supply”
13/Nov./2019

NIHON GENRYO CO., LTD.
P0Copyright © 2018 NIHON GENRYO Co., Ltd. All Rights Reserved.

Company ProfileCompany Name
: NIHON GENRYO CO., LTD.
President: Yasuhiro SAITO
Establish: 1939 (80 years old)
Capital / Employee : JPY 98M / 72 person
Patent: Over 100 (as of 2018)
Location: HQ/ Kawasaki
Branch/ Osaka
Sales Office/ Sapporo, Sendai, Takahagi,Nagoya, Fukuoka
Factory/ Takahagi

Business: 1. Filter Media Manufacturing
2. Filter rehabilitation work
3. Cutting Edge Water Treatment Devise“SIPHON TANK & Mobile SIPHON TANK”
11. Filter MediaJWWA Certified Factory

Registered number : 資H-3

Our TAKAHAGI Plant is a certified factory, which is evaluated to conform to the evaluation standards of products
and quality control system from the Japan Waterworks Association (JWWA) Quality Certification Center.

We are a manufacturer of Filter Media established in 1939,
our media is used more than 80% of WTP in Japan
More than 80% of drinking water in Japan passes through filter media of NIHON GENRYO.
We manufacture and supply variety of filter media in conformity with Japan Water Works Association (JWWA)
regulation. We use experience of 80 years and cutting-edge technology to manufacture our filter media.

Filter SandGravel

0.6 Interceptor

New Color Cutter
Light

Manganese Sand

G-Ceramic
M-Ceramic

Remove Color

RemoveManganese

RemoveManganese

Anthracite

GarnetZeolite

Sand filter cross section

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Why performance of the filter media is getting worse?
Mechanism of filter media
covered by sludge
Daily maintenance
Backwashing, Surface washing, Air washing

SandNew sandSludge attached to surface

Hard to remove whole sludge
Sludge accumulated on surfaceSandFiltration performance become
worth by the bigger particle size

（New Sand）

Attached sludge harden firmly andchange to “Hard sludge”⇒Accumulated sludge

Attached sludge growing harden firmly
Adhesive Sludge accumulated on surface

Sand coveredby sludge

Sand

Hard sludge layer

Filter media change required
every 7 to 10 years.

（Used Filter media）

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2. Filter rehabilitation works
Regularly perform rehabilitation work instead of replace media to stabilize
the normal filtration function
Survey of
Sand filter

Take out Filter
mediaFirst process

Sand filter
Before Kousei Kouji

MediaWashing

Cleaning Filter
basin

Inspection ofUnderdrain

Washing Filter
media

Filter media
carried in thefilter basin

Third process

Second Process

Sieving Device

Sand filter
After Kousei Kouji

Device【Benefit】
Recover filtration function and enable to supply safe and sustainable water
Reusable filter media of natural resource
Enable to check incidental facility

NIHON GENRYO started Filter rehabilitation works for resource protection
since 60 years ago in Japan.

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Develop Original Washing technology “SIPHON Washing”
Structure of SIPHON Washing machine
MotorRotation Spiral

Slurry(Dirty media)
Insertion point

Inner Cylinder
Externalcylinder

Principle of Filter Washing

Waterlevel

Create3D vortex
The vertical and horizontal
vortexes make sand particles tobe kneaded each other in a three
dimensional washing action

Vertical vortex by gravity andscooping up force

Vortex image

Horizontal

Createvortex
by centrifugal force andblockingシフォン洗浄VTR
by inner cylinder=Filter media is moved toarrow direction and washedby circulation

Horizontal vortices arecreated by centrifugalforce and blocking by
inner cylinder+Slurry(Washedmedia)
Discharge
opening

Vertical vortex is createdin each sand grain bygravity and scooping upforce

CreateGeneration process of Singing Sand

3D vortex

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3. “SIPHON TANK”
Filtration device “SIPHON TANK” installed SIPHON washing technology with no filter
media change required.
No filter media change required

Secure filtration area
by ribbon screw

Resilient to high turbidity raw water
Reduce drain of backwashing
Easy maintenance
Eco-friendly filtration device

1. Filtration
As with conventional filtration
systems, filtration is conducted bydown flow with pressure.

2. Backwashing
Backwashing is first conducted for ashort period of time to fluidize filter
media, and then SIPHON cleaning isconducted

Create verticalvortex by
gravity andscooping up
force

Create horizontal
vortex by centrifugal
force and blocking by
inner cylinder three
dimensional vortex
wash filter media likemassage rice

3. SIPHON washing

Filter media is washed by kneading with theupward force that pushes water and filter
media up from the lower part to the upper
part by the rotation of the screw and thedownward force generated by gravity

4. Backwashing

After SIPHON washing, backwashing is
conducted to drain away washing water. Sludge iscompletely exfoliated from filter media to which
SIPHON washing was applied, so sludge can beeasily rinsed.

6High Performance Filter MediaDevelopment Concept
Utilize the effective part of the filtration layer as maximum（60% 80%）
Significant increase in amount of suspended solid captured by stereo filtration layer

Filter sand depth
600mm
0.6mm×1000 grain

More than（Thousand stage

2 times (Suspended solid capture amount max. 2.3 times )filtration theory）

Surface filtration

Depth filtration■ Stratification of conventional filter sandGrain size going big from surface to down layer

ES10%

150〜200mm
25〜33%UC 60%CaptureZone
Depth
600mm

Conventional Rapid Filter Sand
ES 0.6mm−UC < 1.3

300〜400mm
50〜66%

ES 10%

Conventional DMF
UC 80%

Zebra Layer with Interceptor

Suspended substances are spread and removal in
deeper suspended solid capture zone of Zebra Layer

Up to 2.7 times (SCA 3.5 times)

7Movable filtration device Mobile SIPHON TANK
Mobile SIPHON TANK is unitized movable water treatment device install filtration tank,piping unit, washing cartridge, chemical dosing device and control panel.
Drinking water supply for small andmidsize waterworks facilities

Filtration tank (ST)Control panel

Disaster recovery

Piping, valve, meter unit

Turbidity treatment at construction site
Around 3 days from install to watersupplyInstalled MST by disaster-relief andcontinuously using as WTP

Package box

Chemical dosing device
Raw water
Washing cartridge
Treated water

Drinking water supply at disasterTransportation by truck

Truck mounted type MST8Our proposing modelof New Water Supplyfor Small & Medium scale Waterworks

With Mobile SIPHON TANK (MST)9

Disaster Recovery 2018 in JAPAN and New Water Supply Model

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Record of disaster recovery in LAOS 2013
Tempest hit the south of Lao People’s Democratic Republic from
September 18 to 24, 2013 and caused flooding damage to Saravahn Province.
Truck mounted type water treatment unit “Mobile SIPHON TANK”, deployed at
Sekong Province, was sent to affected area for support water supply. Drinkingwater was supplied for 10,573 households (67579 people) there from
September 22 to 29, 2013. Also Oudomxay Province, northen part wasdamaged by flood in August 2013. “Mobile SIPHON TANK” stationed at Luang
Prabang Province was sent to affected area and supplied drinking water for
1,529 households (8,741 people) there.

11Record of disaster recovery in Philippines 2013
Huge typhoon “Yolanda” hit central Philippine on
November 8th, 2013 and caused tremendous damage to Leyte
island and its surroundings. Japan International Corporation
Agency (JICA) requested NIHON GENRYO to support area
affected by disaster. NIHON GENRYO dispatched 7 peoples to“Daanbantayan” from December 19 to 30, 2013 and supplied
drinking water with water treatment device “Mobile SIPHONTANK” as requested by JICA. Drinking water was supplied for
4,000 households (20,000 people) there from December 28th,
2013, which is only 3 days after installation.

Raw water

Treated water

Only 3 days after starting installation12

Record of disaster recovery in Japan 2018
Dispatched Water Rescue Team immediately
after destroyed Water Purification Plant by Torrential
rain at Western Japan in 2018.
July,2018 torrential rain hit entire West Japan. It
caused tremendous damaged to the lifeline. NIHONGENRYO WATER RESCUE team was sent toUwajima-city as requested by government and themunicipality. Seven units of Movable water treatment
device, Mobile SIPHON TANK, were delivered therewith Japanese self-defence forces support. These
provided the water for total volume of 4,100 m3 per
day and supplied it to 6,500 households, whichmeans 15,000 people.

Start water supply 4,100 m3/day in just
15 days after installation13

We implement ideal of waterworks by MST
Siphon Tank
Control Panel

Package Box
Piping, Valve, Meter UnitMedia: Interceptor

Chemical Dosing Unit

Siphon Screw
Treated water

Raw water

MST is a Small Water Purification Plant

Only in Japan

Remote monitoring is option

Dispersion type water supply with domestic water source >> Save Pipe work
Respond to population trend due to integral unit combination >> Flex-response
Easy construction without heavy construction >> Save Cost & Construction term
Easy operation and maintenance >> No Filter Media Change & Save BW water
Enable to transport to disaster area >> Easy Set-up & Quick response14Thank you very much

Please contact Momoko NAGATA (Ms.)■ Overseas DivisionTEL:044-222-5555
FAX:044-222-5556

Challenge through Water, for future, for human life

info@genryo.co.jp / www.genryo.co.jp

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