Detailed document No.1

1 Bio-treatment without using
activated sludge● Low-cost wastewater treatment system for

public sewer discharge

Aquablaster diffusion pipe
2019.12

■ Problems solved and costs reduced

Aquablaster diffusion pipe

A sewer discharge system
was used, but the cost oftreatment was high.

After shifting to wastewater treatment using theAquablaster diffusion pipe, the cost was reducedby 10 million yen per year and complaints about
the odor from neighbors completely disappeared.
(Boxed lunch factory)

Treated wastewater was
at levels higher than sewagedischarge standards.

After shifting to wastewater treatment using theAquablaster diffusion pipe, wastewater could be treated
up to levels lower than the sewage discharge standards,
and wastewater containing mineral oil could be treated at
the same time successfully. (Precision equipment factory)

The cost of sludge treatment
through pressurized flotation
was high and there wasan odor problem.

The use of a pressurized flotation unit, which
requires sludge treatment and chemical agent
costs, was not desired; the introduction of theAquablaster diffusion pipe was a success. (Bakedgoods factory)

There was a problem withthe odor of substances suchashydrogen sulfide andfatty acids.

Places such as the guest rooms and banquetr o o m s m e l t l i k e a s e w e r. S u c h a s m e l ldisappeared after the Aquablaster diffusion pipe
was introduced, and even the water became
clean. (First class hotel)❶■ Conventional activated sludge system flow and problems

Aquablaster diffusion pipe

Problems with activated sludge● Excess sludge treatment ● Odor generation● MLSS control● Necessity of operationmanager
Dissolved
oxygencontrol●ScreenMeasuringtank

Adjustment tank

Untreated water tank

Sludge returned

Inflow

Aeration tank for treating activated sludge

Hydrogen sulfide
produced

Costs required
for treatingexcess sludge

Discharge

Dehydrated
sludgeSludgeDehydrating device

Sludge storage tank

Settling tank

Monitoring tank
(Disinfection tank)❷■ Food plant treatment flow example

Aquablaster diffusion pipe

: 1500mg/L reduced to● SS
200mg/L or less
Boxed lunch factory wastewatern-hex:300mg/L reduced to●● Wastewater amount : 220 to 250㎥/day35mg/L or less
● Discharged to : Public sewer* The values for treatment are not discharge standards.
● BOD : 2100mg/L reduced to 350mg/L or less They are values in the contract.
● Wastewater type :Aquablaster
diffusion pipe AS

Just perform aeration with theAquablaster diffusion pipeand supply degrading bacteria.

Keeps SS below thestandard discharge value,so there is absolutely noneed for sludge treatment.
Aquablaster ALInflow
BOD : 2100mg/L
S S : 1500mg/L
n-Hex : 300mg/L

Rootsblower● Untreated water tank : 10㎥● Adjustment tank : 110㎥
● Treated water tank : 160㎥

Measuring tank

Returned

Wedge wire-type
SS screen

Bioreactor

Rootsblower

Discharge
BOD : 350mg/Lor less
SS : 200mg/Lor lessn-hex : 35mg/Lor lessUntreated water tank

Adjustment tank

Aquablaster treatment tank

Aquablaster treatment tank❸■ Aquablaster diffusion pipe layout in each tank

Adjustment tank internal piping

Aquablaster diffusion pipe

Treatment tank internal piping

Based on fluid dynamics and empirical values, design calculation is elaborately performed
according to the shape of each water tank's bottom, water depth, water amount, andwastewater load, so that without adjusting valves, the same amount of air is emitted as an
air blast from each Aquablaster pipe and there is no place left unstirred at the bottom ofeach water tank and at the water surface.

❹■ Cost comparison before and after introduction

Aquablaster diffusion pipe

Wastewater had been treated using a pressurized flotation device before, but,after shifting to treatment using the Aquablaster diffusion pipe, cost reduction of
12 million or more yen per year was achieved.

Annual cost comparison tablePressurizedflotation used

Aquablaster

Difference

Sewerage charge

9,900,000

2,100,000▲ 7,800,000

Cost of sludge collection

3,600,0000▲ 3,600,000

Cost of power consumption

3,024,000

3,456,000

432,000

Cost of chemical agents
such as coagulants

1,200,0000▲ 1,200,000

Total

17,724,000

5,556,000▲ 12,168,000

Item* The above sewerage charge refers to a cumulative amount added to the regular sewerage charge when wastewater is at levels higher than discharge standards.

❺■ Diffusion pipe Aquablaster mechanism

Aquablaster diffusion pipe

❶ Air from the blower is emitted as a high speed
air blast.

❷ Water and sludge at the bottom are swept up
by an air lift effect.

❸❸ With special shaped fins developed by using

fluid dynamics, air and water are vigorously
mixed together to generate nano air bubbles
and circulating currents in the tank. (Patent pending)❹❹ When circulating currents are generated, oxygen❶❷is also supplied to the corner sections at thebottom of the water tank, where the dissolved
oxygen concentration does not increase easily.

❺ By keeping the dissolved oxygen concentration
at 2.0mg /Lor more, microorganisms areactivated maximally.

❻■ Aquablaster diffusion pipe circulating power

Aquablaster diffusion pipe

By spreading internally-generated nano air bubbles over the entire water tank, notonly is the dissolved oxygen concentration at the bottom of the tank increased, butalso it becomes difficult for sludge to settle - This is a major characteristic of theAquablaster diffusion pipe.
Conventional aeration system

Sludgeaccumulates
at the bottomandbecomes
anaerobic.

Circulating aeration system

Oxygenspreads overthe entire tankand sludge does
not settle at thebottom.

When the Aquablaster diffusion pipe is used, microorganisms can perform
anaerobic respiration metabolism even with high-load wastewater; odor is therefore
not generated.
❼■ Comparison with other systems
Activated sludge

Installation
space
Initial costs
Running
costs
Odor
generation
Treatment
capability
Operation
management

Aquablaster diffusion pipe

Pressurized flotation Aquablaster diffusion pipe
YES

MAYBE

Installation is possible as far as themachine and installation space areavailable.

Installation is possible in a space equalto 1/3 to 1/4 of the space required foran activated sludge system.

NOYES

MAYBE

A large water tank and sludge
treatment equipment are required.

Only the cost of a pressurized
fl o t a t i o n d e v i c e a n d s l u d g edehydration unit is required.

A treatment tank of a certain size isrequired.

MAYBENO

YES

Costs are mounting for sludge
treatment and operation
management.

Costs are mounting for sludge
treatment, chemical agents, andoperation management.

Only the cost of electricity and thecost of bio-supply are required.

MAYBENO

YES

Hydrogen sulfide and rotting odors
are generated in the sludge storage
tank.

Structurally, hydrogen sulfide androtting odors are generated.

An offensive odor substance sucha s h y d r o g e n s u l fi d e i s n o t
generated.

YESNO

YES

Wastewater can be treated up tolevels equal to river discharge
standards.

A problem with BOD treatment
remains.

Wastewater can be treated up tolevels equal to sewage discharge
standards.

NONOYESFor such work as sludge
concentration control, dedicatedpersonnel need to be assigned.

For chemical agent injection, sludge
control, and others, a considerable
amount of labor is required.

Roughly, only machine operation
check is required

NOA large area is required.

❽■ Other wastewater treatment records
Waste plastic recycling plant (12 sets OEMed to Nikko)

Supplied／December 2003...

Unit mg/L

Raw water

Food processing factory wastewater treatment

Treated water River discharge

BOD

2000

80100 or less

COD

1600

70100 or less

SS

2000

4030 or less

N-Hex200

15 or less

Supplied／May 2001

SHIMADZU CORPORATION Seta factory Kitchen & industrial wastewater treatment

Supplied／November 2002

Supplied／October 2001

Supplied／January 2009

Aquablaster diffusion pipe

Treated water Sewage discharge

Unit mg/L

Raw water

BOD

450

5300 or less

SS430

4300 or less

N-Hex

380

2（Mineral）5 or less

Food waste recycling plant wastewater treatment

Treated water Sewage discharge

Unit mg/L

Raw water

300 or less

BOD

150

1080300 or less

SS100

101230 or less

N-Hex

151Unit mg/L

Raw water

BOD

1200

85

SS

800

N-Hex120

Supplied／July 2005

Treated water Discharge standard

Water being
circulated andreused ascoolant waterfor machines

Food processing factory wastewater treatment

Major hotel (modification work) Kitchen wastewater treatment

Unit mg/L

Raw water

Unit mg/L

Raw water

BOD

2100

350

400 or less

BOD

680

78200 or less

SS1500200

300 or less

SS

500

57

200 or less

N-Hex

150

1030 or less

N-Hex

350

Treated water Value in the contract

35

40 or less

Supplied／February 1999

Treated water Sewage discharge

Food processing factory wastewater treatment

SHIMADZU CORPORATION Head office Kitchen wastewater treatment

Unit mg/L

Raw water

Unit mg/L

Raw water

BOD

1200

220

300 or less

BOD2000100200 or less

SS

800

300

300 or less

SS

2500

120

200 or less

N-Hex

400

2030 or less

N-Hex

250

1530 or less

Treated water Discharge standard

Supplied／September 2007

Treated water Sewage discharge❾https://www.aience.co.jp/