Detailed document No.8

8 Grease trap problem solved!!
● A system for improvement considered inearnest by a wastewater treatment professional

2022.09

■ Grease trap worries and problems

Greastrator diffusion pipe

Awful smell!
Don’ t want toopen the lid!
Maintenance isa burden!
Insect pests attracted!

❶■ Worries solved with a Greastrator diffusion

pipe system!!

Greastrator diffusion pipe

When wastewater drainage stops,
the problem can be solved running the air pump system.

Goals of the system
Air pump❶ Preventing offensive odors

Do not make customers feel
uncomfortable and increase thenumber of repeat customers.

❷ Saving on cleaning work
Discharge

Save the burden and workfor your employees.

❸ Preventing insect pest

occurrences

Greastrator diffusion pipe

Reduce pest-control costs andalso respond to HCCAP.
Greastrator
diffusion pipe

❹ Preventing pH from dropping

Prevent pubic sewer deteriorationand offensive odor generation.

❷

■ Supply examples and customer opinions

Fried chicken shop in Osaka

Restaurant in Otaru

School meal supply center

Greastrator diffusion pipe

Current situation

Aeration was introduced, but the problem of foul odors going into
the dining area existed. After the introduction of a Greastrator diffusion pipe system, foul odors disappeared completely, and water
became very clean. When the shop is open, the system is stopped
to prevent oil content from flowing out. For that reason, oil balls
somewhat occur, but they are easy to remove and do not smell bad.
Now, students working part-time wash frying baskets without reluctance. [Manager of the shop]

Current situation

Aeration and purification equipment with oil and fat decomposing bacteria developed by some National University were introduced, butfilamentous fungi grew, and complaints were made by customers
because of foul odors and sludge. After the introduction of the Greastrator diffusion pipe system, the problem was solved - its effect surprised
me. After installation, in the middle of summer, a small number offilamentous fungi grew once. However, just by increasing the air volume
a little, the problem was solved. [Sales representative in charge]

Current situation

The school meal supply center in question was located next to theconnecting corridor of the adjacent school. Before installation,students and other people suffered from awful smells, but after installation, such smells disappeared, and it became very easy to clean thegrease trap. Thanks to this, the system was recommended and supplied to two more school meal supply centers in the same prefecture.
In both centers, the system is being kept in good condition.
[Sales representative in charge]❸■ Greastrator diffusion pipe mechanism

Greastrator diffusion pipe

Offensive odors caused by putrefaction can be prevented
by running the Greastrator diffusion pipe system
during periods in which wastewater does not flow,
so as to prevent oil content from being swept away.

❹Greastrator diffusion pipe mechanism❶ Air from the air pump is emitted through the nozzle as a highspeed air blast.

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

❶❷❸ With special shaped fins newly developed by using fluid
dynamics, air and water are vigorously mixed together togenerate nao air bubbles and circulating currents.
(Patent pending)❹ When circulating currents are generated, microscopic air
bubbles are also supplied to the bottom of the water tank tomaximally activate purifying water.

❹■ Aquablaster makes a difference compared toordinary diffusion pipes.
Ordinary diffusion pipes are used.

Greastrator diffusion pipes are used.

Diffusion irregularities occurred, and oil content
accumulated in the corner, where maggots grew.

Water is stirred neatly, maintaining its aerobicstate.

Q. Why is it that ordinary diffusion pipes
don't work effectively?
It seems that ordinary diffusion pipes do notwork effectively, often for the above reasons.
① microscopic bubbles cannot be generated,② water cannot be stirred,③ diffusion pipes are clogged,④ sludge settles at the bottom.
It seems that ordinary diffusion pipes do notwork effectively, often for the above reasons.

Greastrator diffusion pipe

Conventional aeration system

Circulating aeration system

Sludge accumulates at the bottom
andbecomes anaerobic.

Oxygen spreads over the entire tank andsludge does not settle at the bottom.

❺■ Greastrator diffusion pipe system installation example

Large grease trap

Small grease trap
●Recommended air flow:
200L /min or more

Greastrator diffusion pipe

Air pump●Recommended air flow:
250L /min or more

Air pump

Caution!!
Use bothsystems at alevel of 300mm
or more for thewater depth.
Greastrator
diffusion pipe
dimensional
drawing

Greastrator diffusion pipe standards
GR-GR-

Greastrato

4 units

6 units

Bottom section piping
specifications

Made fromMade from

120L /

200L /Air pump
Connecting
pipingMade frompolyvinyl chloride

Made frompolyvinyl chloride

Installationinterval

Any dimension

Any dimension❻■ Wastewater treatment with lower costs proposed

Greastrator diffusion pipe

■ There are many wastewater treatment device supply examples

To say nothing of grease traps,
Aience established wastewater
treatment technology that canachieve levels lower than sewage
discharge standards just by using
the Aquablaster diffusion pipe anddegrading bacteria injections.

Waste plastic recycling plant (12 sets OEMed to Nikko)

Supplied／December 2003...

Treated water River discharge

Unit mg/L

Raw water

BOD

2000

80100 or less

COD

1600

70100 or less

SS

2000

4030 or less

N-Hex200

15 or less

Food processing factory wastewater treatment

Supplied: February 2009. Food factory wastewater treatment device flow chart

Supplied／October 2001

Unit mg/L

Raw waterBOD

2100

350

400 or less

SS1500200

300 or less

N-Hex

350

3540 or less

Treated water Value in the contract

SHIMADZU CORPORATION Seta factory Kitchen & industrial wastewater treatment

Supplied／November 2002

Treated water Sewage discharge

Unit mg/L

Raw water

BOD

1200

85300 or less

SS

800

80300 or less

N-Hex

120

1230 or less

Food processing factory wastewater treatment
In the above treatment system, wastewater is treated up to levels below sewage discharge
standards as follows: raw water BOD: 2000 to 3000mg/L reduced to 300mg/L or less, andnormal-hexane extracts: 300 to 500mg/L reduced to 30mg/L or less. In general, the volumetricloading rate is 0.5 to 1.5kg/㎥. For a grease trap when the capacity of a water tank is small,the loading rate becomes several tens of times as large as that.
Supplied／September 2007

Treated water Sewage discharge

Unit mg/L

Raw waterBOD

2000

100200 or less

SS2500120200 or less

N-Hex250

1530 or less❼■ The product can be returned if it does not work

effectively in any of the following conditions.

Greastrator diffusion pipe

Greastrator diffusion pipe definition
The Greastrator diffusion pipe is a device to prevent unpleasant odors generated from grease traps, prevent insect pests
from being attracted by putrid odors and causing infestations, and reduce cleaning frequency. In addition, when using thisproduct, water viscosity becomes lower, and that will help prevent clogs in main pipes. (* In principle, use the productduring periods in which wastewater is not flowing in.)
The product also has purifying capabilities such as the capability to decompose oil and fat. However,it does not guarantee specific values for oil content, BOD,and SS, considering the relationship between the grease trap
capacity and the wastewater load (volumetric load).

Usage conditions for achieving normal performance❶ The product must be used for a grease trap for a water depth of 300mm or more.
❷ The product must be used for a grease trap with a width (short side) of 450mm or more.
❸ Basically, the product must be used for a grease trap with the following feature: For the wastewater flow, the flowrate does not exceed the oil-water separation speed (0.9m/minute).
❹ Only OEC Alpha K.K. purifying water must be used as a bio- or washing liquid.

Expected effect and other conditions❶ Odors❶ -1 / For foul odors from the grease trap, maintain it at a level that does not make workers and customers feel uncomfortable.
❶ -2 / The aim is to prevent the generation of putrid odors such as hydrogen sulfide, propionic acid, butyric acid, and acetic acid.
❷ Cleaning ❷ -1 / Clean the residue basket as needed so that it does not become full.
❷ -2 / In a kitchen where a lot of oil content flows in, oil balls may be formed on the water surface. Remove them with a tool such as a net.
❸ Clogging ❸ -1 / When the pipe diameter of the effluent pipe is not appropriate, or when the inflow exceeds the oil-water separation speedofpipesof the grease trap (0.9m/minute) even temporarily, whether there is a Greastrator diffusion pipe or not, clogs in the piping may occur.
❸ -2 / Non-heat-treated starchy powder (flour, starch, powder for deep-fried food) is called β-starch. It is refractory and settles atthe bottom. Make❽https://www.aience.co.jp/en/