1Technologies in Water and Wastewater Treatment
2008, 2014 New Technology, 2019 Green Technology from Ministry of Environment, Korea
MICHIGAN TECHNOLOGY
DOF = DAF + Ozone
Removal of BOD, COD,
40times magnified micro-bubbles
Micro-bubbles are precipitated
DAF/DOF (Dissolved Air/Ozone Flotation) System
Ozone Contact Method Comparison
Bubble layer
Micro-bubble layer
Conventional and DAF Treatments (B Water Treatment Plant)
Scum is floated
Water Quality Difference: Sedimentation vs DAF (B Water Treatment Plant)
Sedimentation Basin DAF Effluent Basin
Water is not Clear and not Transparent due to small flocs
Water is Clear and Transparent to the bottom
Diagram of DOF
DAF and DOF are alternatively operated depending on influent quality
Ozone
Advantages of DAF/DOF
1. Higher treated water quality 2. Much smaller construction cost 3. Much smaller footprint
Retention Time : 10minutes
Retention Time : 5hours
DOF system
Renovation of Domestic Wastewater Treatment by DOF for Water Reuse
Biological Wastewater Treatment
Biological Wastewater Treatment
Treated Water Quality by DOF (Domestic Wastewater)
DOF treated effluent quality is a level of reuse
Drinking Performance of Treated Domestic Wastewater by DOF Plant
Domestic Wastewater can be Treated at a Drinkable Level
MASTER PLAN Anticipated International New City
Residential Area with Waterfront : High tech-Ubiquitous City (U-City)
Agricultural Purpose
MASTER PLAN
Raw water
Effluent of 2nd
Biological System
Color of Pigment Wastewater which strongly resisting in any technology is removed by DOF
5ppm 150(CU) 6ppm 112(CU) 8ppm 72(CU)Raw Water 498(CU) 14ppm 35(CU)
Expected Color Removal by DOF
Palm oil wastewater color
Low Conc. of Ozone (2.07 volts)
Michigan Technology : Contact Ozone in High Concentration
Conventional Technology: Contact Ozone in low Concentration
Michigan Technology can Control Ozone Concentration in Water
Michigan Technology
(Raw Wastewater : S Chemical Company Wastewater )
Industrial Wastewater Treatment by DOF
0
20
40
60
80
100
(mg)
(mg)
COD Color
a te
a te
Chart10
27.6204903374
34.3229132433
62.0963703374
38.7117724025
79.8166579217
96.962296907
79.1163843455
235.2186805706
107.8505183536
507.0567887388
113.6904608637
PO2

(mg)
(%)
2.9473684211
12.0643431635
41.5789473684
32.9758713137
52.5263157895
32.4396782842
59.6842105263
39.9463806971
61.4736842105
45.308310992
65.1578947368
Sheet1


(mg)
(mg)
(mg)
(mg)
(mg)
(mg)
(mg)
(mg)
(mg)
(mg)
Front Side Back Side
DOF Small Plant (200m3/day)
Size : 2m x 1.5m x 2.5m (May be carried inside Container Box) Drinking water : may supply to 1000 people
Operating Cost : about 5cents/m3
- Wastewater treatment and water reuse solution
for midsize city, apartment complexes
- Fit for wastewater treatment for individual
factories
treatment plant to supply an entire city
- Solution for wastewater treatment for big
cities
industrial complex
The Large Scale Plant - Large scale drinking water and
wastewater treatment
• Ozone generation : Using Oxygen generator • Site : Chung Nam
• COD Influent 484.9-Effluent 86.0 (RR: 82.5%), SS Influent 392.5 - Effluent39.4 (RR 90%)
DOF-PO3 system (Pig Wastewater Treatment)
Advanced wastewater treatment plant at Sabong in Jinju (DAF)
DOF/DAF Systems1. DOF/DAF Systems
Records of applications (References)
No Concentrate production like in RO
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