Catchment area Tobl

Catchment area and calculation bases

ARA Tobl disposes of 14 municipalities in Pustertal and has a catchment area of 1,176 km2. This corresponds to 10% of the total area of South Tyrol. When it was commissioned in 1996, the sewage treatment plant Mittleres Pustertal purified the wastewater of the municipalities of St. Lorenzen, Bruneck, Percha, parts of Olang and Rasen-Antholz. In 1997 Sand in Taufers, the municipality of Ahrntal to Steinhaus and the remaining part of Rasen-Antholz followed. In 1998 the municipalities of Prettau and M├╝hlwald also joined. In the year 2000 the municipalities St. Vigil, Wengen and St. Martin in Thurn were connected.

limits

List of limit values to be observed

Parameter

EU directives

Dimensioning of the plant

COD

125

75

BOD5

25

15

Ntot

10

10

Ptot

1

1

GUS

35

30

dimensioning bases

Hydraulic load: 95,000 inhabitants or population equivalents
Specific waste water generation 300 l/E day
Dry weather flow QTWA 570 l/s
Wetweather flow QRWA 1.140 l/s
Daily quantity of sewage 28.500 m3/day
Biological load: 130,000 inhabitants or population equivalents
BOD5 - Loads:
Spec. load value:
Daily freight:

60 g/E day
7.800 kg/day
COD - Loads:
Spec. Load value:
Daily freight:

110 g/E day
14.300 kg/day
NKj -Loads:
Spec. Load value:
Daily freight:

12 g/E day
1.560 kg/day
NH4-N - Loads
Daily freight:

910 kg/day
NO3-N - Loads
Daily freight:

60 kg/day
Ngesamt - Loads
Daily freight:

1.620 kg/day
Phosphor P - Loads
Spec. Load value:
Daily freight:


3 g/day
390 kg/day