Technical data Unteres Pustertal

Dimensioning of the plant:

Capacity:	55.000 inhabitants equivalent, therefrom 30% popolation 45% from tourism 25% from industry
Loads:	2.000 kg BOD₅/d 3.300 COD/d 350 kg N_tot/d 60 kg P_tot/d
Sewage:	Daily quantity of sewage: 4.000 m³/d Dry weather flow: 107 l/s Wet weather flow: 300 l/s
Quantity of sludge:	Row sludge: 182 m³/d 1.400 kg/d dried matter After primary sludge treatment: 25 m³/d After sludge dewatering: 4,5 m³/d
Total effective volume:	mechanisch-biologische Reinigung 8.546 m³ Schlammlinie 1.716 m³
Total enclosed area:	25.000 m³

Technical data

Sewerage system

Catchment area:	333 km²
Lenght:	Hauptsammler: 19,73 km
Diameter:	250 mm – 500 mm
Material:	PVC, GFK, GG, STZ, SB
Quantity manholes:	336
Quantity measuring stations:	6
Quantity Pump stationes:	5

Technical equipment

Pump station:

3 screw conveyor, 800 mm,
Tilt angle 33°; Q_max 100 l/s

Screening plant:

2-line
1 bar-screen, wide 1.300 mm
Bar spacing: 10 mm; Q_max = 1.080 m³/h
by 1 screenings wash presses integrated and bagging decive

grit chamber:

2-line; each line
Grit chamber: diameter = 5,30 m;
Volume 50 m³; T = 6 min by Q_t
Grit washer Q_m = 16 l/s

Preliminary clarifier:

1 line
Diameter D = 18,5 m
Water depht 2,95 m
V = 844 m³…….t = 2,19 h by Q_t
sludge scraper

Biological basin:

2-line, each Line
Aerob basin 1 basin = 440 m³
Anox basin 1 basin (Denitrification) = 440 m³
Aerob 3 basins (Nitrification) = 1.320 m³
6x 132 pieces plate aerator
2x 123 pieces plate aerator
Volume - Aerob basin 880 m³
Volume - Denitrification 880 m³
Volume - Nitrification 2.640 m³
Volume - Total A + V_D + V_N = 4.400 m³
4 vertical agitator
Recirculation pumps 2x Q = 190 l/s
3 compressors, each: 1.800 Nm³/h, 45 kW