Detailed document No.4

4 Circulating water purificationand maintenance system● Implementing environmental measures that reducecleaning and industrial waste disposal costs
and generate profits

Aquablaster diffusion pipe

2019.12

■ Are you having any of the following problems?

Coating refuse reduction desired

Problems ina paint work worksite

Cleaning cost reduction desired
Putrid odor elimination desired

Cleaning cost reduction desired

Other problems related
to circulating water

Putrid odor elimination desired
Reduction of escherichia coli (E.coli)
and filamentous fungif desiredPutrid odor elimination desired❶■ Circulating water treatment device supply example
Vehicle paint shop

Agricultural machinery
paint shop

Supplied: October 2005

Supplied: February 2007

Pit circulating water treatment

Paint booth

Putrid-smelling sludge reduction

Putrid-smelling sludge reduction

Cleaning frequency
15 times to 3 times

Sludge reduction rate: 50%

Heavy machinery
paint shop

Railway car paint shop

Supplied: July 2006

Supplied: August 2005

Putrid-smelling sludge reduction

Paint booth

Cleaning frequency

Putrid-smelling sludge reduction

Cleaning frequency
10 times to 1 time

Cleaning frequency
1 month to 6 months

Home electrical
product paint shop

Body parts paint shop

Supplied: December 2007

Supplied: August 2005

Putrid-smelling sludge reduction

Paint booth

2-month sludge volume reduction

Putrid-smelling sludge reduction

SS1100 to 360mg / L

Cleaning frequency
1 month to 4 months❷

■ Putrefaction prevented to reduce cleaning
and industrial waste disposal costs

Aquablaster diffusion pipe

"Aquablaster diffusion pipe",
which is a very tough air
diffusion device and capableof treating coating refuse aswell, is effectivfor aconcentration pit where thewater depth is high.

"Sludge Eater diffusion
pipe", which generates
horizontal jet water
streams, is effective for apaint booth where thewater depth is low.

System benefit● Reduced cleaning frequency● Shortened cleaning time
● Lower sludge viscosity● Reduced volume of generated sludge● Easy maintenance● Putrid odor elimination● Reduced bad bacteria count● Reduced LCC

Cost of industrial waste
disposal reduced!!
❸■ Vehicle paint line circulating water
purification example

Aquablaster diffusion pipe

Cost reduction amount for vehicle factory, company A
Roots blower
To the line

InletFirst tank

Before installation After installation
Cleaning cost

4,500,000

900,000

Cost of industrial waste disposal

9,900,000

1,320,000

Cost of wastewater treatment

840,000

168,000

Cost of electricity

0

1,944,720

Cost of activators

02,400,000

15,240,000

6,732,720

Total
Cost reduction amountFourth tank

Costs reduced by 8,507,280 yen per year

Vehicle factory Paint circulating water water quality change ( Unit: mg / L )Circulating waterRaw
replacement guidelines waterSludge change

After
After
After
1 month 2 months 4 months

BOD

-270

1100

1960

1440

COD-

140

1560

2220

3130

SS

2000

100

156

1710

1900

N-Hex

-

24

2456

26

PH-

6.7

6.7

6.3

6.1

Viscosity m/S

10.0

1.0

1.5

8.0

6.9
❹

■ Construction machinery paint line
circulating water purification example

Aquablaster diffusion pipe

Cost advantages
BeforeAfter
implementation implementation
Cleaning cost

2,400,000

400,000

Cost of industrial waste disposal

1,800,000

300,000

0289,000

Total

4,200,000

989,080

Annual cost advantage

3,210,920-yen reduction

Cost of electricity

Construction machinery paint shop Paint circulatingwater water quality change (Unit: mg/ L )Operation wascontinuously performed
without maintenance for
11 months and the pit wasdrained.

Raw water

Circulating water
after 11-monthcontinuous
operation withoutwater replacement* See the dataon the right.

After
1 month

After
After
nine months 11 months

BOD

180

2400

1100

COD

1780

71

84

1200

1200

N-Hex

131

8.6

PH

7.1

7.2

7.1

SS

Fresh water*SS: 2,000mg/L was considered as a guide for water replacement. However,
without the level exceeding that value, continuous use for 11 months insteadof cleaning on a monthly basis could be successfully achieved.
❺■ Paint booth circulating water purification data

Aquablaster diffusion pipe

Railway car paint shop Paint circulatingwater water quality change ( Unit: mg / L )Raw water
BODCOD
SSN-Hex
PHGeneral bacteria■ Supplied: October 2005/January and May 2006
▶12 sets in total supplied

11,0004,900
21,00014
78,300After
1 month670
640
130
3
75,600After
2 months
1,500940
110
3620,000* The introduction of the Sludge Eater diffusion pipe lead to a 40% sludge
reduction as well as extending the water replacement frequency from every
month to every six months.

Major delivery
destinations

Area

Suppliedquantity

Vehicle parts manufacturing plant Fukuoka Prefecture 16 units■ Supplied: January and August /2006 ▶ 4 sets in total supplied

Railway car manufacturing plant Yamaguchi Prefecture

4 units

Motorcycle manufacturing plant Hyogo Prefecture

4 units

Subcontracted paint shop Hyogo Prefecture

4 units

Vehicle parts manufacturing plant Shizuoka Prefecture

1 unitLighting fixture manufacturing plant Hyogo Prefecture

1 unit❻■ Circulating water closed purification system
for water-based paintAquablaster diffusion pipe

A circulating water closed system was built for a booth for water-based
paint, which is believed to be difficult to be treated with water.

Roots
blowerRoots
blowerCoagulator

Adjustment tank

Treated water
storage tank #1

Treated water pump tank

Treated water
storage tank #2

Roots
blowerBelt press dryer❼

■ Vehicle roof leak inspection circulatingwater purification example
Cost advantages per location

This is an
example ofcirculating waterpurification
applied to aproduction line
for checking
whether watergets into avehicle in thevehicle
inspection
process.

Beforeimplementation

After
implementation

6,000,000

300,000

0388,9446,000,000

688,944

Cleaning cost
Cost of electricity
Total
Annual cost advantage

5,311,056-yen reduction* For information, the maximum water usage amount per location was reducedfrom
4,000t to 100t, and even the minimum water amount per location was reduced from
1,000t to 50t, achieving 95% or more reduction.

Circulating water data
Photo of installation

Before implementation

State of operation

After implementation

Supplied:
October 2005,and thereafter,
introduced at threelocations.

Supplied:
October 1999,
and thereafter,supplied at threelocations.

Raw water

After 1 month

After 2 months

BOD

19.0

8.7

5.6

COD

11.2

25.7

18.0

SS

85.0

28.7

13.6

N-Hex

7.2

12.0

4.5

PH

6.8

7.1

7.5

* Also from the above data, it can be seen that water used for a few months is cleaner
than the water after replacement. This shows that after introduction, water which
could be used only for one week before can be circulated and continuously used for
as long as half a year to one year.

❽■ Item-based comparison with other products

Water stirring
capability

Aquablaster diffusion pipe

Nano bubbles

Ozone

Ultraviolet rays

YES

MAYBE

MAYBENO

Even for clean water, putrefaction advances if it is not moving at a minimum of five cm or more persecond. If water is dirty, it must move more. Therefore, to purify circulating water, it is very importantto produce powerful streams in the entire tank so as to prevent stagnation.

YES

Capability to stop
bad bacteria

Oxygendissolution
efficiency

MAYBE

MAYBE

To keep down bad bacteria counts (such as filamentous fungi and anaerobic bacteria), the best way is toactivate aerobic bacteria and let them prey on bad bacteria. Moreover, by having aerobic bacteria disassemble organic matter, nutrients will be reduced and the number of aerobic bacteria will be reduced
naturally as well. The bacteria killing capability of ozone or ultraviolet rays can be confirmed on a small
scale such as when wastewater is in a beaker, but it has little effect on actual wastewater.

YESMAYBE

MAYBE

NOTo activate aerobic bacteria as above, 3.0mg/L or more dissolved oxygen is necessary over the entire tank.
Aquablaster itself has high oxygen dissolution efficiency, and such a capability works only when oxygen is
dissolved in the entire water tank. Therefore, the powerful stirring power of the Aquablaster is required.

YESAir bubble
diameter

YES

YES

Aience's core business is industrial wastewater treatment; Aience therefore does not stick to the matterof air bubble diameters but places importance on the business of treating wastewater. From numericalvalues for oxygen dissolution efficiency, it is said that even nano bubbles are probably generated whenusing Aquablaster. However, it is also said that even the University of Tokyo cannot prove up to 10μ airbubbles. Therefore, Aience does not advertise nano bubbles for this product.
❾https://www.aience.co.jp/