Examples of water and exhaust gas
improvements at painting facilities

Aience Co., Ltd.

■ Examples of water and exhaust gas improvements at painting facilities

Puriﬁcation of refuse pond (automotive painting line)
Problem
Customer wanted to minimize generation of putrid odors from refuse ponds of auto
body painting lines.

Challenges
Minimizing putrid odors, lengthening the service life of circulating water, andlightening the load on ﬁnal-stage wastewater treatment equipment.

Solutions
Fourteen Aquablaster AS-250 (previous model) units were installed in a 50-ton
water tank.

● Circulating water type ： Circulating water for painting● Water tank：５0㎥● Model： Aquablaster systemEﬀects
The service life of circulating water, which could previously be used for only one
month, was lengthened to three months, and putrid odors were virtually eliminated.

Problem
Customer was seeking ways to address the generation of putrid odors, lighten theload on ﬁnal-stage wastewater treatment equipment, and lengthen the service lifeof circulating water.

Challenges
Minimizing putrid odors, lengthening the service life of circulating water, andlightening the load on ﬁnal-stage wastewater treatment equipment.

Solutions
In four 70-ton water tanks, totaling 280-tons, ten Aquablaster units were installedin Tank no. 2 and ﬁve units in Tank no.3.

● Circulating water type ： Circulating water for painting● Water tank： 280㎥

● Model： Aquablaster systemEﬀectsPutrid odors were virtually eliminated and the service life of circulating water,which could previously be used for only one month, was lengthened to ﬁve months.
Even so, the load on ﬁnal-stage wastewater treatment equipment was lightened.

Problem
When building a new construct construction equipment plant employing
melamine-based paint, the customer was seeking a way to reduce refuse pondcosts.

Challenges
It was hoped that maintenance work, which had been carried out once a month
thus far, could be reduced to once every six months or so.

SolutionsThree new 10-ton circulating pits (refuse ponds) were constructed, and four
Aquablaster units were installed in each one.

● Circulating water type ： Circulating water for painting● Water tank： 30㎥● Model： Aquablaster systemEﬀectsOperation continued for 14 months with absolutely no need for maintenance,
cutting annual costs by almost ¥50 million.

■ Examples of water and exhaust gas improvements at painting facilities

Refuse pond puriﬁcation (Other painting lines)

Problem
At a painting plant for products such as household appliances, there werecomplaints from the community about odors from refuse ponds, and the speed ofwater quality deterioration was an issue as well.

Challenges
Eliminating complaints from the community and slowing deterioration speed.

Solutions● Circulating water type ： Circulating water for painting● Water tank： 30㎥● Model： Aquablaster system

Aeration was carried out with Aquablaster AS-250 units installed in appropriate
locations.

EﬀectsComplaints from the community were eliminated, and the time between water
replacements was lengthened by a factor of three to ﬁve.

Problem
When adding a new painting line, the customer wanted to minimize circulatingwater maintenance costs.

Challenges
Lengthening the periods between maintenance and preventing putrid odors.

Solutions
Aeration was carried out with six Aquablaster units installed in a 10-ton circulatingwater tank.

● Circulating water type ： Waste liquid from plant (after coagulation)● Water tank

： 20㎥／day● Model： Aquablaster systemEﬀects
The replacement cycle of circulating water was lengthened dramatically compared
to existing lines, and cost reductions were achieved.

Problem
Circulating water for water-based paint rotted, and acetic acid odors pervaded theplant interior. The customer wanted to purify the circulating water to resolve theodor issue.

Challenges
In addition to improving the work environment, the customer hoped puriﬁcation
would enable reuse of circulating water.

SolutionsTank aeration, coagulation precipitation and a belt press dryer were added, and thepuriﬁed water stored in a storage tank.

Eﬀects● Circulating water type ：Puriﬁcation of circulating water for water-based painting● Water tank： 10〜30㎥／day● Model： Aquablaster system

The acetic acid odor was virtually eliminated, and the circulating water andcoagulating agent proved to be highly compatible. In addition, the belt press dryer
worked better than expected, and only a small amount of sludge with low watercontent was produced. The customer praised Aience products for accomplishing
all this with a minimum of equipment.

■ Examples of water and exhaust gas improvements at painting facilities

Puriﬁcation of booths for washing and no-pump painting

Problem
Painting booths for auto parts such as shock absorbers emitted odors ofputrefying water and paint thinner, resulting in complaints from neighbors.

Challenges
Eliminating complaints from neighbors.

Solutions
The customer installed sludge eaters in each booth and observed theireﬀectiveness.

● Circulating water type ： Painting booth● Water tank： 4.0㎥

● Model： Sludge eater systemEﬀectsPutrid odors were virtually eliminated, and complaints from neighbors ceased.

Problem
At a plant for painting of auto parts such as rear-view mirrors, the customer
wanted to do away with putrid odors that triggered complaints from thecommunity, and minimize the viscosity of sludge.

Challenges
Minimizing putrid odors to eliminate complaints from the community, and reduced
the viscosity and volume of sludge produced.

Solutions
Sludge eaters were installed in each no-pump booth.

Eﬀects● Circulating water type ： Painting booth● Water tank： 3.0㎥

● Model： Sludge eater system

Putrid odors were virtually eliminated, and sludge viscosity was reduced. Also, pipe
blockage of the circulation pump, which had stopped operating an average of eighttimes per month, was eliminated, and extremely smooth operation was achieved.
Sludge volume was also reduced by approximately 30%.

Problem
Customer wanted to reduce putrefying water odors and sludge volume from atrain-car painting booth.

Challenges
Customer wanted to boost work eﬃciency, reduce the volume of sludge and cutcosts.

Solutions
Six sludge eaters were installed in a 2.0 ton water tank with a 3.7kW pump.

● Circulating water type ： Painting booth● Water tank： 2.0㎥

● Model： Sludge eater systemEﬀectsPutrid odors were virtually eliminated, and sludge volume was also reduced byapproximately 30%-40%.

■ Examples of water and exhaust gas improvements at painting facilities

Paint drying oven exhaust gas deodorization equipment
Problem
A combustion system was used for ﬁrst-stage treatment of exhaust gas emitted
by paint drying ovens, but the system was incapable of thorough treatment, andthere were complaints from neighbors. The fumes from drying ovens also
permeated the plant itself and created poor working conditions.

Challenges
Improving working conditions and eliminating complaints from neighbors.

SolutionsThree Deoriser DR-30W units were used to treat exhaust gas emitted at
700㎥/min and air volumes of 350㎥/min after combustion treatment.

● Circulating water type ： Paint drying oven exhaust gas● Water tank： 1050㎥／min● Model： Deoriser DR-30W × 3 units

EﬀectsComplaints from neighbors ceased, and it was possible to treat the leaked gasthat permeated the upper areas of the plant and resolve the problem.

Problem
When a new plant was scheduled for construction, there was concern over the ill
eﬀects of exhaust gas from paint drying ovens on others in the vicinity.

Challenges
Customer wanted to treat and emit exhaust gas from paint drying ovens at low
cost.

Solutions● Circulating water type ： Paint drying oven exhaust gas● Water tank
● Model： 50㎥／min： Deoriser DR-4W × 1 units

Rather than combustion equipment, one Deoriser DR-4W unit was used to treat
exhaust gas emitted at volumes of 50㎥/min, which was mixed into the overall
mass of exhaust gas.

EﬀectsIn three years of operation, there has been absolutely no odor-related trouble.

Problem
For the new plant, the Environmental Department of the local authorities requested
that measures be taken to deal with odors of exhaust gas from paint drying ovens.

Challenges
Customer wanted to treat and emit exhaust gas from paint drying ovens at lowcost.

Solutions
One Deoriser DR-16W unit was used to treat exhaust gas.

● Circulating water type ： Paint drying oven exhaust gas● Water tank
● Model： 150㎥／min： Deoriser DR-16W × 1 units

Eﬀects
In ﬁve years of operation, despite highly concentrated emissions of exhaust gas,
there has been no odor-related trouble. Running costs have been kept low as well,with maintenance carried out just once every two or three months.

■ Circulating water puriﬁcation equipment installation examples■ Examples of water and exhaust gas improvements at painting facilitiesMajor customers

ModelPurpose / Application

DAIHATSU head plant industry

Groundwater puriﬁcation equipment

Removal of iron and manganese

DAIHATSU head plant industry

Puriﬁcation equipment for circulating water for electrodeposition gas scrubber

Reduction of aldehyde gases

DAIHATSU head plant industry

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Circulating water service life lengthened from one week to over one year

DAIHATSU head plant industry

Painting booth (B) circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

DAIHATSU ryuoh plant industry

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

DAIHATSU head plant industry

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Circulating water service life lengthened from one week to over one year

DAIHATSU head plant industry

Painting booth (C) circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Miyoshi Paint Industry

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Yamagiwa International

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Kawasaki Heavy Industries, Ltd. Akashi factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Nishikawa kasei

Painting booth circulating water puriﬁcation equipment

Reduction of sludge and number of cleanings required

Nihon Anodizing Co.,Ltd.

Painting booth waste liquid puriﬁcation equipment

Reduction of industrial waste volumes

Kanto Auto Works, Ltd. Higashi fuzi factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Nissan Shatai Syonan ﬁrst factory

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

HITACHI Kasado Mechanics

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

HITACHI Automotive Products

Painting booth circulating water puriﬁcation equipment

Auto parts paint drying oven

Nissan Shatai（repeat）

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

TSUBAKI EMERSON CO.

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

YANMAR Biwa factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

SHOWA

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Nissan Shatai（repeat）

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

TOYOTA industries corporation

Painting booth circulating water puriﬁcation equipment

Reduction of putrid odors / Puriﬁcation of circulating water

Dia Molding Co.,LTD. South factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

SHOWA（repeat）

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Yachiyo Industry Co., Ltd. Yokkaichi factory

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

MITSUBISHI FUSO TRUCK AND BUS CORPORATION

Puriﬁcation equipment for circulating water for existing deodorization equipment

Reduction of number of cleanings required and volume of water used

MORIROKU HOLDINGS COMPANY, LTD. Suzuka factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

ICHIKOH INDUSTRIES, LTD. Fuzioka factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Kobe Bankin Kogyo

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

Kobelco Construction Machinery Co., Ltd.

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

NISSAN DIESEL MOTOR CO.,LTD. Kamio factory

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

SUZUKI Kosai factory

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

Gifu Auto Body Co., Ltd.

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

SUZUKI thai factory

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

TOYOTA motor corporation tahara factory

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

SHOWA CORPORATION Nagoya factory

Painting booth circulating water puriﬁcation equipment

Reduction of putrid odors

KANSAI GAS METER CO.,LTD

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

NIPPON FRUEHAUF COMPANY，LTD Atsugi factory

Puriﬁcation equipment for circulating water for light-vehicle leak inspections

Reduction of putrid odors and number of cleanings required

YANMAR Construction Machinery CO., LTD.

Painting booth circulating water puriﬁcation equipment

Reduction of sludge, number of cleanings required, and odors

■ Drying oven exhaust gas treatment equipment installation examples■ Examples of water and exhaust gas improvements at painting facilities

Major customers

ModelPurpose / Application

DAIHATSU
MOTOR CO., LTD.

Modiﬁcation ofexisting deodorizationequipment

Electrodeposition paintdrying oven exhaust gas
treatment

Tsukuda Industry
corporation.

DR-9S deodorizationequipment(made of SUS)Electrodeposition paintdrying oven exhaust gas
treatment

WATANABE
INDUSTRY Co.,Ltd

DR-16W deodorizationequipment(made of SUS)Electrodeposition paintdrying oven exhaust gas
treatment

TOCALO Co.,Ltd.

DR-6W deodorizationequipment(made of SUS)

Drying oven exhaust gas
deodorization

MITSUBISHI FUSOTRUCK AND BUS
CORPORATION

DR-9W deodorizationequipment(made of SUS)Electrodeposition paintdrying oven exhaust gas
treatment

Osaka DENSO
Industry

DR-2S deodorizationequipment(made of SUS)

Drying oven exhaust gas
deodorization equipment

YOROZU

DR-6W deodorizationequipment(made of SUS)Electrodeposition paintdrying oven exhaust gas
treatment

Kobe Bankin Kogyo

DR-4W deodorizationequipment(made of SUS)Electrodeposition paintdrying oven exhaust gas
treatment

KYOKUTO KAIHATSU
KOGYO CO.,LTD.

DR-4W deodorizationequipment(made of SUS)Electrodeposition paintdrying oven exhaust gas
treatment

MITSUBISHI FUSOTRUCK AND BUS
CORPORATION（repeat）

Three separate-typeDR-30W deodorizationequipment units

Electrodeposition paintdrying oven exhaust gas
treatment

NIKKATSU ELECTRIC
WIRE WORKS, LTD.

DR-6-7 deodorizationequipment

Drying oven exhaust gasdeodorization equipment

NAKAYAMAKOGYOU
CO., LTD.

DR-6-7 deodorizationequipment

Drying oven exhaust gas
deodorization equipment