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Technical data Sompunt

Dimensioning of the plant:

Capacity:	58.000 inhabitants equivalent each 10% population 80% from tourism 10% from industry
Loads:	2.955 kg BOD₅/d 3.905 COD/d 446 kg N_tot/d 150 kg P_tot/d
Sewage flow:	Daily quantity of sewage 5.000 m³/d Dry weather flow 56 l/s Wet weather flow 300 l/s
Quantity of sludge:	Row sludge: 27 m³/d 1.300 kg/d dried matter After primary sludge treatment: 30 m³/d After sludge dewatering: 5 m³/d
total basin-use-volume:	Meccanical – biological treatment 9860 m³ Sludge treatment 1.080 m³
total enclosed area:	21.207 m³

Technical data

Sewerage system

Catchment area:	109 km²
Length:	5,16 km
Diameter:	300 mm – 400 mm
Materiale:	PEHD
Quantity manholes:	114
Quantity measuring station:	2
Quantity pump station:	5

The main collector was renovated 2014/15

Renovation of the main collector in the Badia Valley

Technical equipment

Emergency screening plant:

1 bar-screen, Bar spacing 3 mm

Screening plant:

2 steep grate
Bar spacing 6 mm, Qm = 1.008 m³/h
by 1 screenings wash presses integrated and bagging decive

Aerated grit chamber:

2-line
Grit chamber: Cross section 2x 11,50 m², Volume 2x 270 m³, T = 65 min by Q_t
Grit washer Q_m = 12 l/s

Preliminary clarifier:

4-line
Wide 5,0 m; Lenght 29,60 m
Wather depht = 2,40 m
V = 4x 380 m³…….t = 3,0 h by Q_t,
longitudinal flowed, sludge scrapers

Biological basin:

4-line, each line
Wide 4,60 m
Lenght 38,00 m
Water depht = 5,00 m
4x 242 pieces plate aerator
Volume total 4x 800 = 3.600 m³
Recirculation sludge,
Recirculation pumps 14x Q = 25 l/s
4 compressors
3 to 1.530 Nm³/h, 37 kW
1 to 981 Nm³/h, 30 kW

Final clarifier:

4-basins
Lenght 9,70 m; wide 40,00 m
Water depht = 3,20 m
V = 4x 1.150 m³…….t = 3,0 h by Q_t
Longitudinal flowed, chain&flight scrapers

Phosphate precipitation:

Simultaneous precipitation

Quantity of row sludge:

Row sludge 27 m³/d with 1.300 kg TS/d and 30 m³/d

Pre-thickeners:

1 pieces
Diameter 7,00 m; volume = 1x 150 m³
Rabble rakes, sludge water separation

Secondary sludge pretreatment:

Screencloth, conditioning by
polyetectrolytes Q = 15 m³/h

Digestion chambre:

2 piece
Cylindrical tank
D1 = 7,00 m; D2 = 1,30 m; H = 13,40 m
Usable volume = 2 x 390 m³;
digestion time 30 days
Circulation by pumps

Post thickeners:

1 piece
Diameter = 7,00 m; Volume = 1x 150 m³
rabble rakes

Gasometer:

Usable volume 500 m³;
H = rd. 8,0 m, D = 10,00 m

Gas flare plant:

Capacity = 600 m³/h

Sludge dewatering:

1 screw press
Conditioning by polyetectrolytes
Q = 3 – 5 m³/h

Sludge storage:

Area: 4x 4,40 m x 9,40 m=165 m²;
volume: 4x 25 m³ = 100 m³

Ventilation system:

Chemical area treatment (scrubber) from meccanical and sludge treatment: 15.000 m³/h

Heating system plant:

Heating boiler system consisting of 1 piece heating boiler with 165 kW rated output with
Automatic switchover for methane gas and sewage gas operation

Gas engine plant:

1 piece:
P_tot = 170 kW; P_el = 60 kW; P_th = 110 kW
1 piece:
P_tot = 192 kW; P_el = 80 kW; P_th = 112 kW

Deep well – industrial water:

2 pieces of pumps, each 4,45 l/s and 6,12 l/s