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The Material of
Aerator Kuh Kai |
Photograph: Advanced Industrial Science
and Technology
(AIST) (Kagawa Prefecture) |
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Brewing (miso) plant Aerator KUH KAI 24 units |
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| Raw water tank inflow: 200 to 300m³/day |
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| Raw water tank |
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First aeration tank |
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Second aeration tank |
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Flocculation tank |
Discharge |
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Food industry (ham) drainage |
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KUH KAI was introduced because offensive
odors were generated due to sludge flocculation on the tank bottom (Inflow
600m³/day) |
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Raw water BOD after removal of sludge on the tank bottom: 2,200ppm →
inflow at 1,400ppm after pressurized floatation, 48 KUH KAIs introduced
in aeration tanks. |
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September 12, 2006 (rain)
Water temperature: 25.9°C |
December 12, 2006 (rain)
Water temperature: 15.0°C |
Aeration tank inflow
(before introduction) |
Discharge
(after introduction) |
| BOD |
1,400mg/ℓ |
2.9mg/ℓ |
| SS |
900mg/ℓ |
6.8mg/ℓ |
| Normal hexan |
52mg/ℓ |
2.1mg/ℓ |
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Food industry (freezing) drainage |
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| KUH KAI was introduced due to diffuser corrosion (100m³/day) |
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| 8 KUH KAIs introduced (October 2010, 2 units in raws water tank; June 28,
2011, 6 units in aeration tanks and an inverter(11kw). |
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June 28,2011(Fine) Water temperature:30.8°C |
June 28,2011(Fine) Water temperature:30.8°C |
September 28,2011(Fine) Water temperature:25.3°C |
September 28,2012(Cloudy) Water temperature:22.9°C |
| Aeration tank inflow (Before KUH KAI introduction) |
Treated discharge water (Before KUH KAI introduction) |
Treated discharge water (After introduction) |
Treated discharge water (After one year) |
| BOD |
779mg/ℓ |
4.9mg/ℓ |
Less than 1.0 mg/ℓ |
1.7mg/ℓ |
| COD |
478mg/ℓ |
25.2mg/ℓ |
5.0mg/ℓ |
4.7mg/ℓ |
| SS |
833mg/ℓ |
11mg/ℓ |
5.0mg/ℓ |
4mg/ℓ |
| Power per week |
1,319.8kwh |
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1,075.1kwh |
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| ※Power improvement : 18.5% |
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| Existing diffuser corroded and damaged due to clogging |
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KUH KAI installation condition |
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Operation in a aeration tank running condition |
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| Aerator Performance Comparison |
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| Category |
Item |
Air bubble type |
Mechanical type |
KUH KAI |
| Oxygen transfer rate |
No clogging |
× |
○ |
◎ |
| Free intermittent running and denitrification |
× |
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◎ |
| No sludge flocculation on the tank bottom |
× |
× |
◎ |
| Impact on microorganisms (floc, etc.) |
◎ |
× |
◎ |
| Maintenance |
Power saving (small pressure loss) |
× |
× |
◎ |
| Facility cost (easy installation and piping) |
○ |
× |
◎ |
| Operation management (Parts replacement, etc.) |
× |
× |
◎ |
| Repair and durability |
× |
× |
◎ |
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| KUH KAI delivery record |
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| over 300 (at March 2014) |
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Treatment of industril effluents |
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※Can be used at facilities troubled by animal oil and fat,
persistent substances and offensive odors, etc. |
| Organic discharge: |
Food (processing, freezing, etc.,) / beverage (including dairy and brewery)
/ livestock (night soil, etc.), etc. |
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| Inorganic discharge: |
Plant (dying, papermaking, semiconductors, liquid crystals,etc.) / chemical
plant (pharmaceutical, printing, etc.) / ther-mal discharge from power
plants or steel manufacturers and its cooling / linen supply, etc. |
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Treatment in production line |
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| ※Superior in stirring and gas-liquid mixing, can be used in various fields. |
Food/beverage plant (two liquid-mixing), etc.
Chemical/pharmaceutical plant (chemical reaction), etc. |
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Gas absorption/degassing, etc. |
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※Dissolution of harmful gas into liquid or diffusion
and removal from liquid. |
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Stirring for neutralization |
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Effective mixing of undiluted solution and reagent
such as undiluted solution and pH preparation reagent. |
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By running KUH KAI before shipment at a fish farm,
Tightening effect on fish meat can be expected. |
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| ※The KUH KAI can be used in a wide variety of industries other than the above. First, please contact us. |
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