August 29, 2012

August 29, 2012
We are here.
Tokyo
Dome x 4.5
Operation started from March 1922
Total area 197,878 m2
(Size of Tokyo Dome x 4.5 times)
Treatment capacity 700,000 m3/day
Facilities: 21 grit chambers,
18 primary sedimentation tanks,
17 reaction tanks, and
33 secondary sedimentation tanks
Higashi Ogu
Purification
Center
Mikawashima Water
Reclamation Center
Kita-ku
Arakawa-ku
Toshima-ku
Bunkyo-ku
Taito-ku
Shinjuku-ku
Covering area
3,936ha
Assumed population
810,000
Current treatment
capacity per day
Chiyoda-ku
700,000m3
◇. Mikawashima Water Reclamation Center
Mikawashima Water Reclamation Center, Hokubu Sewerage Office,
Bureau of Sewerage, Tokyo Metropolitan Government
Equipment Management:
Operation and maintenance of equipment
Equipment Development:
Designing of mechanical and electric equipment
Facilities Development:
Designing of civil engineering facilities
Water Quality Management:
Management of water treatment conditions
Location: 8-25-1 Arakawa, Arakawa-ku
(Nearest station: Machiya, Keisei Line and Metro Chiyoda Line)
Covering area: Arakawa-ku, Taito-ku, Bunkyo-ku, Toshima-ku, etc.
Treatment capacity: 700,000 m3/day
Total area: 197,878 m2
Operation started from March 1922 as the first modern sewerage
treatment facility in Japan. The former main pump building is
designated as important cultural property and is opened to the
public occasionally in events, such as cherry blossom (spring),
azalea blossom (May), cultural assets week (autumn), etc.
Cherry blossom and
important cultural property
Summary of Mikawashima Water Reclamation Center
Aizome River Trunk
(from Yushima
Aizome
Pump) （4×2.8ｍ）
Pump
No.2
Jizobori
Pump
Aizome East
Jizobori
Trunk
（3×1.9ｍ）
Total area 197,878m2
Treat 420,000m3/day
No.2 Jizobori Trunk （5.0ｍ）
Aizome North
Asakusa Trunk
（2.88×1.83ｍ）
Aizome
No.2 Asakusa Trunk
（Φ3.25ｍ）
No.2 Minami Senju
Trunk（Φ2.6ｍ）
Ogu Trunk（0.9ｍ）
Asakusa
Facilities included in the Mikawashima
Water Reclamation Center
◇. Sewerage treatment: pumping and water treatment equipment
Pump
Gate
Screen
Ｍ
Primary
sedimentation tank
Houses,
factories,
buildings, etc.
Sewerage
trunk lines
Primary
sedimentation tank
Grit chamber
Reaction tank
Pump well
Water
Sterilization
Secondary
discharge
sedimentation tank
【Microbe】
Rivers, etc.
From
pump
well
Sludge
treatment
Suction sludge
Sludge
treatment
Air
blower
Return sludge
Excess sludge
Sewerage after grit chamber is
tanked here to sink fine
particles and sands.
Reaction Tank
Organic materials are dissolved by
microbe (activated sludge),
stimulated by aeration from air
blower.
Inside Reaction Tank
Organic materials are dissolved by
microbe (activated sludge), stimulated
by stirring and aeration from air
blower.
Air Blower
Machine to provide air to the organic
reaction tank
Sink sludge and skim upper water
to chlorination tank.
滅菌設備
Sodium hypochlorite
injection facility
Discharge water to Sumida
River after sterilization.
Operation of Higashi Ogu
Purification Center
Add sodium
hypochlorite
Mikawashima
Advanced treated wastewater
Delivery
(Approx. 30%)
Add sodium
hypochlorite
Reclaimed
wastewater
(Approx. 15%)
Purification
center
Highly advanced treated wastewater
Sludge treatment
Wastewater
Water
treatment
Sludge
Sludge tank
Water treatment
30,000m3/day
Concentration 0.35%
Ｐ
Sunamachi Center
Wish to be a Resident-friendly Water
Reclamation Center
End of the presentation on the
Mikawashima Water Reclamation Center
2012/10/29
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