4.Environmental Protection Activities
AISIN AW ENVIRONMENTAL REPORT 2016
4.5
Conserving Water Quality
In addition to batch processing of oil-contaminated wastewater, production process wastewater, and domestic
wastewater discharged by company facilities at a general water treatment plant, AW is working to prevent
water pollution by installing equipment for separating oil from rainwater runoff at production plants. The
company also recycles some processed water, circulating it for use in industrial processes in an effort to
conserve water resources.
Treated wastewater recycling and abnormal wastewater/raw water return system
1. Treated water is recycled and used in industrial processes, to water grass and plants, etc.
2. When abnormal wastewater is detected, the system automatically stops all discharge immediately and returns the abnormal
Reuse (as water for industrial processes)
Automatic instrumentscontinuously
measure water quality.
Water diluted with M/C coolant
PH COD Nitrogen Phosphorus
Reuse (domestic treated water)
Water for
watering grass
and plants
Abnormal
wastewater
Carp
pond
Water for
use in
toilets
Treatment plant
M/C
WC
Wastewater
Domestic wastewater
Industrial wastewater
Discharged into river
Rainwater treatment system
AW collects all rainwater runoff at its production plants for storage in regulating reservoirs after all oil content
has been separated out. The system is designed to prevent oil from flowing into surrounding rivers.
●Oil/water separation tank
Senser
Treatment
plant
Industrial
systems
P
When a sensor detects oil in
the water, the oil is recovered
instead of traveling on to the
treatment plant.
●Effluent recovery system
In the unlikely event that
treated water exceeding
control values were to be
discharged, recovery pumps
are capable of recovering
all such water before it is
released.
Regulating
reservoir
WC
Runoff water from rain
fallingat AW facilities is not
released directly into
surrounding rivers.
●Oil/water separation tank upstream of the regulating reservoir
In the unlikely event
that oil were to be
discharged into a
regulating reservoir,
floating oil recovery
pumps recover the oil
before it is released.
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4.Environmental Protection Activities
AISIN AW ENVIRONMENTAL REPORT 2016
Biotope of Okazaki East Plant
The biotope at Okazaki East Plant is home to a variety of local animal and plant life clustered around a creek
carrying water discharged from the plant’s wastewater treatment facility. The plant has released Japanese
killifish and dark chub, species that live in downstream rivers, into the creek and continues to confirm that the
newcomers are not having a harmful effect on the host ecosystem.
●Okazaki East Plant
●Wastewater treatment facility
●Japanese killifish and dark chub swim energetically about in the biotope’s creek.
Water flows out from this
point into the river.
Japanese killifish
Dark chub
Water discharged from the
wastewater treatment plant
Partnerships with local groups
To contribute to the conservation
of local communities’ water
resources, we regularly invite local
fishing cooperatives to meetings
where we introduce them to
related conservation efforts being
undertaken by the company and
solicit their wishes and requests.
Discussion with members of the Aburagafuchi
fishery cooperative association
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Meeting with members of the Aburagafuchi
fishery cooperative association