18.2.2 CW Performance Evaluation
Sampling is performed at ten sampling points—two samples in septic tank (1st and
3rd chamber), two samples in HF1 (middle and outlet), other six samples are taken at
the outflow from the outlets at each resting stage (VF, HF2, SP1–SP3, and final
discharge point). For the treatment efficiency evaluation, the following parameters
regulated by Czech laws were monitored: COD, BOD 5 , TP, TN, NH 4
+
, TSS. The
samples were analyzed according to the standard methods (APHA 1998). Detailed
Fig. 18.1 Map and layout of the hybrid constructed wetland in Chrámce
Table 18.1 Major design parameters of constructed wetland
Parameter Effective area (m
2
) Depth (m)
Filtration
material
Ã
Volume (m
3
) HLR (cm/d)
HF1
133
0.7
a, b, c
97.2
3.8
VF
49
1.3
a, b, c, d
50.4
10.2
HF2
70
0.9
a, b, c, e
48.6
7.1
Adapted from Šereš et al. (2017)
Ã
(a) Washed gravel 2–4 mm (protective material); (b) washed gravel 4–8 mm, porosity: 0.45,
conductivity 16 cm/s; (c) washed gravel 8–16 mm, porosity: 0.44, conductivity 94 cm/s; (d) washed
gravel 32–64 mm, porosity: 0.46, conductivity 350 cm/s; (e) slag 8–16 mm, porosity: 0.51,
conductivity 47 cm/s
18 Field Study VI: The Effect of Loading Strategies on Removal. . .
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