Aiguamolls artificials per a la depuració de lixiviats de l’horticultura fora de sòl Joan García. UPC, Barcelona

1. AIGUAMOLLS ARTIFICIALS PER A LA DEPURACIÓ
D’EFLUENTS LÍQUIDS
Aiguamolls artificials per a la depuració de lixiviats de l’horticultura fora de sòl
(Cabrils, 18 de novembre de 2013)
Joan García (UPC, Barcelona)

2. Objective
To present recent developments and points of view
in constructed wetlands
Koh Phi Phi, Thailand

3. CONSTRUCTED WETLANDS: conventional setup
Small communities
Pretreatment
(screening)
Primary treatment
(septic tank)
Secondary treatment
(horizontal constructed wetlands)
TSS
(mg/L)
Year
BOD5
(mg/L)
In
In
Out
2003
200 (140)
10 (8)
120 (77)
5 (2)
2004
150 (60)
19 (11)
88 (29)
9 (5)
2005
250 (340)
22 (20)
230 (190)
16 (12)
2006
110 (80)
15 (10)
110 (40)
12 (6)
2007
Verdú, Lleida, Spain
Verdú, Lleida, España
Out
330 (270)
24 (12)
250 (120)
15 (7)
2008
270 (170)
20 (20)
230 (120)
11 (6)

4. CONSTRUCTED WETLANDS: conventional setup
•
Low levels of dissolved oxygen
•
No nitrification
•
Potential for H2S formation, GHG emissions
1
/L
SO42-, mg/L
SO42-, mg/L
In
250
200
150
100
50
0
200
150
100
50
0
250
200
C2-June
C2-August
Inf
lue
C2-July
C2-December
1
nt
2
3
Eff
lu
en
Location
D2-June
Inf
t
l ue
1
nt
2
3
Eff
lu
en
Location
t
D2-July
García et al. (2004)
2
3
Out

5. The cartridge

6. The cartridge
Active
zone
Clogged
zone
Modified from Knowles et al. (2013). Ecol. Eng.

7. The cartridge
Clogged
zone
Active
zone
Modified from Knowles et al. (2013). Ecol. Eng.

8. The cartridge
Clogged
zone
Active
zone
Modified from Knowles et al. (2013). Ecol. Eng.

9. The cartridge
Clogged
zone
Active
zone
Modified from Knowles et al. (2013). Ecol. Eng.

10. CONSTRUCTED WETLANDS: vertical flow development
Brix and Arias (2005)
J.J. Salas
Molle et al. (2005)

11. CONSTRUCTED WETLANDS: recent developments
Concept of integrated treatment in constructed wetlands
1.
Urban wastewater
2.
Runoff (overflows)
3.
Sludge
4.
Reuse
Carrión de los Céspedes, Seville, Spain
(Center for New Water Technologies)

12. Wastewater treatment line
Vertical flow
317 m2
Imhoff tank
Phragmites australis
Average flow ~ 14 m3/d
OLR ~ 9.6 g BOD5/m2.d
Horizontal
subsurface
flow
229 m2
Free water
surface flow
240 m2

13. Sludge treatment line
Area: 20 m2
Loading regime: 1 time/month
Around 42 kg TS/m2.year
Water tank for water reuse
Receives water from the effluent
of constructed wetlands for its
reuse
Capacity: 20 m3

14. CONSTRUCTED WETLANDS: integrated wetland system
Goals of the treatment
E. Coli (log10 units UFC/100 mL)
1.
2.
Produce water with reuse quality
Robust systems to treat combined sewer discharges
• Its quality fulfills the Spanish
guidelines for:
- Recharge of aquifers by
percolation through the ground
- Irrigation of green areas non
accessible to the public
- Silviculture
12
10
8
6
4
2
0
Influent Imhoff
VF
HSSF
FWSWater tank
Treatment unit

15. CONSTRUCTED WETLANDS: integrated wetland system
Reliability of the system to a storm event of 45 mm in 1 hour (Q=
2,5Qd,avg)
1000
TSS
VS
-1
Solids (mg L )
800
600
400
200
0
0
30 60 90 120 150 180 210 240 270 300 330 360
Time (min)
Concentration (mg L -1)
60
FWS
50
40
TSS
VS
COD
NH4-N
NOx-N
30
20
10
0
0
5 10 15 20 25 30 35 40 45 50 55 60 65 70
Time (h)

16. CONSTRUCTED WETLANDS: integrated wetland system
WATER TANK
Ibuprofen
Triclosan
Acetaminofen
Tonalide
Diclofenac
Bisphenol A
Ávila et al. (2013)

17. HETEROTROPHIC BACTERIA
mgCOD l-1
FERMENTING BACTERIA
1 year
2 years
3 years

18. REFERENCES
MANUAL PARA LA IMPLANTACIÓN DE SISTEMAS DE DEPURACIÓN EN
PEQUEÑAS POBLACIONES. CEDEX-CENTA
García, J y Corzo, A. (2009). Depuración con humedales construidos: guía
práctica de diseño, construcción y explotación de sistemas de humedales
de flujo subsuperficial. Descarga gratuita en
https://upcommons.upc.edu/e-prints/handle/2117/668
Groupe Macrophytes et Traitement des Eaux (2005). Épuration des eaux usees
domestiques par filtres de plantes de macrophytes. Descarga gratuita en
http://www.eaurmc.fr/documentation/files/Guide%20Macrophytes.pdf
Kadlec, R.H. y Wallace (2008). Treatment Wetlands. CRC Press, Florida.

19. joan.garcia@upc.edu