Constructional Part
a) Clarification
| Aerated grit chamber and grease trap |
2 x 200 m³ |
| Preliminary clarifier |
8 x 260m3 = 2.080 m³
(retention period during dry weather flow approx. 1 h - lateral flow) |
| Denitrification basin |
4 x 3.250 m3 = 13.000 m³ |
| Aeration basin |
4 x 6.350m3 = 25.000 m³
(retention period during dry weather flow approx 3,7 h. fine bubbly in depth aeration) |
| Final clarifier |
8 x 1.400m3 = 11.200 m³
(surface load during dry weather flow approx. 0,75 m/h - retention period during dry weather flow approx . 2,8 h) |
| TOTAL EFFECTIVE volume |
50.000 m² |
b) Service Building
The service building is built at the bottom of the mountain slope and incorporated into the landscape. It consists of the following sectors:
- Gasometer: Effective volume 2,000 m3
- Gas engine room, heating installation, technical rooms
- Service and administration area
- Sludge dewatering and sludge drying
| Technical Data: |
| Build over area: |
approx. 2.700m2 |
| Excavated material: |
approx. 13.000m3 Loose material: ca. 12.000 m³ Rock and slope stabilisation respectively. Rock excavation: ca. 3.000m2 |
| Need of: |
Concrete:
Lining:
Ceilings:
Reinforcing steel: |
approx. 5.000m3
approx. 20.000m2
approx. 4.000m2
approx. 400.000kg |
c) Digestion Chambers
The two digestion chambers have an effective volume of 2,000 m_ each and they are built into the rocky mountain slope. Only the upper area rises up into the open because for safety reasons.
| Technical Data: |
| Excavated material: |
Rock excavation: approx. 13.000 m³
Loose material: approx. 7.000 m³ |
| Need of: |
Shotcrete:
Anchors:
Welded wire meshes:
Concrete:
Reinforcing steel:
Lining: |
approx. 500 m³
approx. 2.000 m
approx. 3.000 m²
approx. 2.000 m³
approx. 150.000 kg
approx. 5.000 m² |
d) Concrete Works
| The concrete works required: |
Concrete:
Reinforcing steel:
|
50.000 m³
approx. 1.500 tonnes
|
| This is equivalent to approx. 4,160 mixer conveyor trucks or approx. 60 truck loads! |