Khanittha Charoenlarp 1* and Tanapong Duangmanee 2 1* Textile Chemical Engineering Division, Rajamangala University of Technology Krungthep 2 Mae Fah Luang Foundation Under Royal Patronge Efficiency of Wastewater Treatment Using a Combination System of Plantbed Filter and Aerators from Doi Tung Development Project.
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Efficiency of wastewater treatment using a combination system of plantbed filter and aerators from doi tung development project
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Khanittha Charoenlarp1* and Tanapong Duangmanee2
1*Textile Chemical Engineering Division, Rajamangala
University of Technology Krungthep 2 Mae Fah Luang Foundation Under Royal Patronge
Efficiency of Wastewater Treatment Using
a Combination System of Plantbed Filter
and Aerators from Doi Tung Development Project.
Doi Tung Development Project : Mae Fah Luang Foundation Under Royal Patronage
Doi Tung Development Project : Mae Fah Luang Foundation Under Royal Patronage
Existing system
Wastewater pond
Industrial wastewater sources (20-30 m3/day)
Constructed wetland
Macadamia charcoal filter
Anaerobic pond
Wastewater pretreatment rail
Treated water pond
BOD = 370 mg/L
COD = 620 mg/L
BOD = 265 mg/L
COD = 470 mg/L BOD = 130 mg/L
COD = 290 mg/L
BOD = 13 mg/L
COD = 100 mg/L
27 m x 7m x 1m
Vertical flow constructed wetland
Existing system
• Performance
BOD removal = 97%
COD removal = 84%
Color removal = Acceptable color
• Problem
Clogging began after 6 months – 1 year
(Expected life was 3 years)
Propose solution
Hybrid Constructed Wetland
- Floating planted system
- Planted bed system
- Aeration system
Floating planted system
Aeration system Plantedbed system
Floating plants
Plantbed filter
Methodology
5 experimental systems (2 duplicate). I: Aerator system II: Aerator system + Plantbed system III: Aerator system + Floating Planted system + Plantbed system
IV: Aeration system reduced by half + Floating Planted system + Plantbed system
V: Aeration system reduced by half + Floating Planted system + Plantbed system +
• reduce the amount of air in half without affecting the performance. • The roots of floating plants as a habitat for microorganisms. • Planted bed filter decrease suspended solid • Sand filter system / Sedimentation system can be controlled to lower
BOD and SS effluent standards. • Sedimentation pond require less maintenance than sand filter system
• Sand filter system have to clean sand backwashing way to get rid of the SS stuck in the sand.
Improved wastewater treatment
Plantedbed1
plantedbed 2
Influent
rom
anaerobic pond
Treated water pond
Industrial wastewater sources (20-30 m3/day)
Wastewater pond
Macadamia charcoal filter Anaerobic pond
Wastewater pretreatment rail
BOD = 370 mg/L
COD = 620 mg/L
BOD = 265 mg/L
COD = 470 mg/L
BOD = 130 mg/L
COD = 290 mg/L
plantedbed 2
Treated water pond
Plantedbed1
Hybrid Constructed Wetland (floating planted+ planted bed + Aerator)