Efficiency of Wastewater Treatment Using a Combination System of Plantbed Filter and Aerators from Doi Tung Development Project

1. 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.

2. Doi Tung Development Project : Mae Fah Luang Foundation Under Royal Patronage

3. Doi Tung Development Project : Mae Fah Luang Foundation Under Royal Patronage

5. 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

6. 27 m x 7m x 1m
Vertical flow constructed wetland

7. 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)

8. Propose solution
Hybrid Constructed Wetland
-Floating planted system
-Planted bed system
-Aeration system
Floating planted system
Aeration system
Plantedbed system

9. Floating plants

11. Plantbed filter

12. 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 + Sand filter system

13. W x L x H =3.8 m x 5.9 m x 2 m
200L
50L

14. influent
effluent
Sand 15 cm
26 cm
19.5 cm
100 cm
valves

16. influent
effluent
30 cm
30 cm
100 cm

17. 90 cm
18 cm
70 cm
water level
10 cm

18. Influent characteristics
parameter
STD
pH
7.64±0.18
5-9
SS (mg/L)
63.95±30.49
50
COD (mg/L)
345±61.09
120
BOD (mg/L)
141.87±73.13
20
NH4+-N (mg/L)
7.60±4.29
NO3- - N (mg/L)
32.99±15.38
PO43- (mg/L)
1.73±0.98

19. 0
50
100
150
200
250
300
350
400
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SS (mg/L)
SS treatment 1 (mg/L)
effluent standard (mg/L)
Treatment 1

20. Treatment 2
0
50
100
150
200
250
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SS (mg/L)
SS treatment 2 (mg/L)
effluent standard (mg/L)

21. Treatment 3
0
20
40
60
80
100
120
140
160
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SS (mg/L)
SS treatment 3 (mg/L)
effluent standard (mg/L)

22. Treatment 4
0
20
40
60
80
100
120
140
160
180
200
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
SS (mg/L)
SS treatment 4 (mg/L)
effluent standard (mg/L)

23. -16.5
-16.0
-15.5
-15.0
-14.5
-14.0
-13.5
8.68
8.70
8.72
8.74
8.76
8.78
8.80
8.82
8.84
8.86
8.88
8.90
treatment 1
treatment 2
treatment 3
treatment 4
pH
pH
pH change (%)
pH change (%)

24. -200.0
-150.0
-100.0
-50.0
0.0
50.0
100.0
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
treatment 1
treatment 2
treatment 3
treatment 4
SS (mg/L)
SS (mg/L)
STD (mg/L)
SS removal (%)
SS removal (%)
167.67
29.56
26.00
24.72

25. 88.0
88.5
89.0
89.5
90.0
90.5
91.0
91.5
92.0
92.5
93.0
0.0
5.0
10.0
15.0
20.0
25.0
treatment 1
treatment 2
treatment 3
treatment 4
BOD (mg/L)
BOD (mg/L)
STD (mg/L)
BOD removal (%)
BOD removal (%)
11.69
10.67
11.34
14.87

26. 0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0.0
20.0
40.0
60.0
80.0
100.0
120.0
140.0
160.0
180.0
200.0
treatment 1
treatment 2
treatment 3
treatment 4
COD (mg/L)
COD (mg/L)
STD (mg/L)
COD removal (%)
COD removal (%)
178.33
104.78
111.39
112.40

27. -60.0
-50.0
-40.0
-30.0
-20.0
-10.0
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
treatment 1
treatment 2
treatment 3
treatment 4
Ortho-P (mg/L)
Ortho-P (mg/L)
Ortho-P removal (%)
Ortho-P removal (%)
2.07
2.45
3.60
3.65

28. 46.0
47.0
48.0
49.0
50.0
51.0
52.0
53.0
3.5
3.5
3.6
3.6
3.7
3.7
3.8
3.8
3.9
3.9
4.0
treatment 1
treatment 2
treatment 3
treatment 4
ammonia (mg/L)
ammonia (mg/L)
ammonia removal (%)
ammonia removal (%)
3.89
3.82
3.60
3.81

29. 59.0
60.0
61.0
62.0
63.0
64.0
65.0
66.0
67.0
68.0
69.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
treatment 1
treatment 2
treatment 3
treatment 4
nitrate (mg/L
nitrate (mg/L)
nitrate removal (%)
nitrate removal (%)
12.35
10.66
11.46
12.14

30. -18
-16
-14
-12
-10
-8
-6
-4
-2
0
treatment1
treatment2
treatment3
treatment4
pH change (%)
flow rate 21.0 mL/min
flow rate 31.5 mL/min
-120
-100
-80
-60
-40
-20
0
20
40
60
80
treatment1
treatment2
treatment3
treatment4
SS removal (%)
flow rate 21.0 mL/min
flow rate 31.5 mL/min
82
84
86
88
90
92
94
96
treatment1
treatment2
treatment3
treatment4
BOD removal (%)
flow rate 21.0 mL/min
flow rate 31.5 mL/min
0
10
20
30
40
50
60
70
80
treatment1
treatment2
treatment3
treatment4
COD removal (%)
flow rate 21.0 mL/min
flow rate 31.5 mL/min

31. -200
-150
-100
-50
0
50
100
treatment 1
treatment 2
treatment 3
treatment 4
SS removal (%)
with sand filtrated
without sand filtrated
0
10
20
30
40
50
60
70
80
treatment 1
treatment 2
treatment 3
treatment 4
COD removal (%)
with sand filtrated
without sand filtrated

32. Water Canna (Thalia Geniculata)
0
20
40
60
80
100
120
140
160
W1
W2
W3
W4
W5
W6
W7
W8
W9
W10
W11
W12
W13
stem height (CM)
treatment 2
treatment 3
treatment 4

33. Umbella Plant (Cyperus Alternifolius)
0
20
40
60
80
100
120
140
160
180
200
9
10
11
12
13
14
15
16
17
18
19
20
21
stem height (cm)
treatment3
treatment4
0
5
10
15
20
25
30
35
w3
w6
w9
w18
w21
w24
root length (cm)
treatment 3
treatment 4

34. Summary
•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.

35. Improved wastewater treatment
Plantedbed1
plantedbed 2
Influent
rom
anaerobic
pond
Treated water pond

36. 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)

40. Thank you