1. BG, Sofia Nov 2016
Roediger® Vacuum Sewer Systems
Technical introduction, Benefits, Limitations

2. Content
Roediger Vacuum sewer systems | 9/7/2016
1 Vacuum Sewer Systems are …
2 Vacuum Sewer System – how does it work?
3 Components of Vacuum Sewer Systems
Page 2

3. Our Technology – What are Vacuum Sewer Systems
Vacuum sewer systems are…
▪ Collection Systems for domestic waste water
▪ Easy to install systems for waste water within low
and medium dense residential, industrial,
commercial or mixed use areas
▪ State-of-the-art technology, eco-friendly, safe and
operator friendly systems
▪ Alternatives for conventional gravity sewer
systems under difficult conditions
Vacuum sewer systems are NOT…
▪ Transportation systems for waste water (pumping
station replacement)
▪ Main collectors for large sewer systems
▪ Collection systems for storm water (mixed
systems)
Roediger Vacuum sewer systems | 9/7/2016 Page 3

4. Our Technology – How does it work?
Roediger Vacuum sewer systems | 9/7/2016 Page 4

5. Our Technology – How does it work?
Functional description
Roediger Vacuum sewer systems | 9/7/2016
Gravity sewer piping
Manholes Lifting stations
Vacuum sewer piping
L = typical ~100m
Roediger® inspection pipes
Page 5

6. The conventional way
Deep excavation in sandy or rocky grounds
Roediger Vacuum sewer systems | 9/7/2016 Page 6

7. The conventional way
Roediger Vacuum sewer systems | 9/7/2016 Page 7

8. Vacuum – advantages – construction
Roediger Vacuum sewer systems | 9/7/2016 Page 8

9. Vacuum – advantages – construction
Gravity Sewer System
▪ Wide and deep trenches
▪ Average installation depth of 3–8 m
or much more
▪ Large pipe diameters (200-1200 mm)
▪ Ceramic or concrete pipes
▪ Heavy machinery required
▪ Manholes and lift stations required
along lines
Vacuum Sewer System
▪ Small and shallow trenches
▪ Average installation depth of only 1.0
- 1.2 m
▪ Small pipe diameter (90 - 250 mm)
▪ Easy to install, durable HDPE or PVC
pipes
▪ Simple or even no machinery for
excavation
▪ No manholes, no lift stations
Roediger Vacuum sewer systems | 9/7/2016
Gravity sewer system
Vacuum sewer system
Page 9

10. Vacuum – advantages – construction
Less impact on the traffic
Roediger® Vacuum System:
▪ Little impact on local traffic
▪ Small pipes and trenches
Roediger Vacuum sewer systems | 9/7/2016 Page 10

11. Vacuum – advantages – construction
▪ Small pipes, flexible installation
▪ Shallow and small trenches
▪ No manholes, no lift stations
▪ Centralized vacuum station instead of
many lift stations
▪ Saving of construction time
▪ Saving of construction and operation
costs
Roediger Vacuum sewer systems | 9/7/2016
Vacuum sewer system
Gravity sewer system
Page 11

12. Vacuum – advantages – construction
Flexibility during construction progress
▪ Even unexpected obstacles
discovered during construction works
can easily be bypassed by a modified
and more flexible vacuum sewer pipe
laying
Roediger Vacuum sewer systems | 9/7/2016
Obstacles may easily crossed over or below
Page 12

13. Vacuum – advantages – sustainable solution for a
green future - no exfiltration possible!
Roediger Vacuum sewer systems | 9/7/2016
Due to the pressure gradient there will be no
exfiltration in vacuum sewerage systems.
Flexible PVC/ HDPE pipes guarantee a tight pipe
network with long-term lifetime cycles!
No contamination of groundwater!
Page 13

14. Vacuum – advantages – sustainable solution for a
green future - same trench
▪ Fresh water pipes and irrigation pipes
can be installed together in ONE
trench with the vacuum sewer pipe!
Roediger Vacuum sewer systems | 9/7/2016
The fresh water pipeline must be installed in a separate trench
and on a higher level than the sewer pipe.
It is possible and allowed to install both, the potable water pipe
as well as the vacuum sewer pipe, within one single trench.
Page 14

15. Vacuum – advantages – sustainable solution for a
green future - no undetected infiltration possible!
Roediger Vacuum sewer systems | 9/7/2016
In a Roediger® vacuum sewer system any leakage
will be identified immediately through an extended
pump-run time.
Consequently there will be no undetected infiltration
of rain-/storm- or groundwater into the sewage pipe
network, diluting the biological condition of the
Sewerage Treatment Plant (STP).
Knowing that STP’s are responsible for up to 40% of
the energy consumption of small communities, the
pressing question is: “Why spending money for
treating just little polluted rain water?”
No contamination of groundwater!
Page 15

16. Roediger Vacuum sewer systems | 9/7/2016
100% design peak flow
or
< 10 % design peak flow
Gravity
Vacuum – advantages – operation
Tolerating fluctuating flows
 Self cleaning system
 High velocities (4-6 m/s)
 No sedimentation even during low
flow periods
 Suitable for holiday resorts,
demographic change
Page 16

17. Roediger Vacuum sewer systems | 9/7/2016
Summary of advantages
▪ Closed system: no leakage, no exfiltration, no odour
▪ No manholes; no rubbish into sewer
▪ No sedimentation due to high velocity in the sewer pipes; no flushing required
▪ Tolerating fluctuating flows
▪ Flexible system; easy design adaption of profiles during construction phase
▪ Only one central vacuum station: no further lifting stations required
▪ No electrical connections except at the central vacuum station
▪ Small diameter pipes (d90 to d250); HDPE (SDR11) or PVC (PN10)
▪ Shallow, fast and easy trenching (cost savings)
▪ Reduced O&M equipment /cost
▪ Reduced H2S and other fouling gases
Page 17

18. Components of vacuum sewer systems
Main components
Roediger Vacuum sewer systems | 9/7/2016
 Central vacuum station
 Collection chambers (with valves)
 Vacuum pipe network
Page 18
Collection Chamber Vacuum Station
Vacuum Pipe
Network
Collection Chamber Vacuum Station
Vacuum Pipe
Network

19. Components of vacuum sewer systems
Vacuum pipe network
Roediger Vacuum sewer systems | 9/7/2016
The saw-tooth profile – state of the art
 Air based transport of sewage
Advantages
 Shallow trenches, small pipe diameters
 High velocities, no sedimentation
Vacuum pipes
 local: HDPE SDR 11 / PVC PN 10, SDR 21
Vacuum network fittings
 our product – special vacuum fittings
Page 19

20. Areas of application
▪ Flat areas
▪ Rural areas / low population density
▪ Water protection / catchment areas
▪ Nature reserves
▪ Tide-influenced / flood zones
▪ Shores / coastlines / islands
▪ Marinas / jetty projects
▪ Water villas / beach resorts
▪ High ground water table
▪ Material flow separation
▪ Obstacles in the ground
▪ Areas with seasonal occupation
▪ Connection of low-lying settlements
▪ In case monitoring is needed
▪ Bad soil conditions (rocky / sandy soil,
avoiding deep excavation, swamps)
▪ Minimum construction impact (traffic,
historic buildings, narrow streets)
Roediger Vacuum sewer systems | 9/7/2016 Page 20

21. Cost comparison
Roediger Vacuum sewer systems | 9/7/2016 Page 21

22. Investment costs (CAPEX) of gravity and vacuum system
Page 22
Conditions
Costs
In areas suitable for vacuum investment costs for gravity sewers
are rising - each new difficulty is reflected in money
Heavy
machinery
Deeper
trenches
Larger pipe
diameters
High
ground
water table
Unstable /
rocky
underground
Low
population
density
Add.
pumping
stations
Add.
flushing
water
Roediger vacuum sewer system – cost comparison | 9/7/2016

23. Example 1:
Area with a high population density
Gravity vs vacuum investment costs | 22.11.2016 Page 23
500 m
500 m
2.000 PE
VSVS
2.000 PE
500 m
500 m

24. Example 1:
Area with a high population density - costs
Vacuum costs:
Pipes: 2.000 m x 50 €/m = 100.000 €
Collection chambers: 100 CC x 2.000 € = 200.000 €
Vacuum station: = 200.000 €
Total: 500.000 €
Gravity costs:
Pipes: 2.000 m x 100 €/m = 200.000 €
Manholes: 40 x 300 € = 12.000 €
Pump station: 1 x 50.000 € = 50.000 €
Total: 262.000 €
Gravity vs vacuum investment costs | 22.11.2016 Page 24

25. Example 2:
Area with a low population density
Gravity vs vacuum investment costs | 22.11.2016 Page 25
3.000 m
2.000 m
2.000 PE
VS
40 PE
2.000 PE
2.000 m
3.000 m
VS
40 PE

26. Example 2:
Area with a low population density
Vacuum costs:
Pipes: 10.000 m x 50 €/m = 500.000 €
Collection chambers: 130 CC x 2.000 € = 260.000 €
Vacuum station: = 200.000 €
Total: 960.000 €
Gravity costs:
Pipes: 10.000 m x 100 €/m = 1.000.000 €
Manholes: 200 x 300 € = 60.000 €
Pump stations: 4 x 50.000 € = 200.000 €
Total: 1.260.000 €
Gravity vs vacuum investment costs | 22.11.2016 Page 26
- 30 %

27. Example 3:
Sample project in the Middle East
Gravity sewer system vs. vacuum sewer system
Why vacuum?
▪ Flat
▪ Sandy
▪ Coastal area
▪ 7.500 PE
Gravity vs vacuum investment costs | 22.11.2016 Page 27

28. Example 3:
Investment costs of a vacuum sewer system
Gravity vs vacuum investment costs | 22.11.2016 Page 28
Vacuum sewer lines PVC (d. & i.) 511.225 €
Inspections pipes and division
valves
38.735 €
Collection chambers (d. & i.)
(350 pcs. G65 2.5" passenger
load + service connections)
652.000 €
(536.000 € BWT)
Vacuum station with one bio filter
(d. & i.)
356.000 €
(268.000 € BWT)
Customs and transport for the
Vacuum station + collection
chambers
92.000 €
TOTAL 1.661.961 €
Length of the lines: app. 19.000 m
Gravity sewer lines (d. & i.) 1.584.310 €
Manholes (d. & i.) 1.010.054 €
Five pumping station
(concrete and structure, pumps)
(d. & i.), estimated
159.950 €
Bio filters (115 pcs) 50.008 €
TOTAL 2.804.322 €
Length of the lines: app. 18.000 m
Vacuum: Gravity:
Altogether Advantage Vacuum: 40%

29. Example 4:
Sample Project in East Europe
Gravity sewer system vs. vacuum sewer system
Gravity vs vacuum investment costs | 22.11.2016 Page 29
No. Material
Gravity system Bilfinger Water Technologies
Difference
(+/-)
Observations
Quantity
Unit price
(€)
Value (€) Quantity
Unit price
(€)
Value (€)
1.
Sewerage pipe corrugated
SN8, Dn 250 mm
15.000 m 9,5 142.500 0 0 0
Prices ECE
Nov. 2011
Mounting price ≈ 50.000 €
2.
Sewerage pipe corrugated
SN8, Dn 315 mm
9.000 m 12,8 115.200 0 0 0
3.
PEHD pipe SDR 11,
De = 90 mm
0 0 0 5.600 m 4,7 26.320
Prices POLITUB
Bistriţa
January 2012
Mounting price ≈ 75.000 €
(Including fittings)
4.
PEHD pipe SDR 11,
De = 110 mm
0 0 0 8.500 m 6,9 58.650
5.
PEHD pipe SDR 11,
De = 125 mm
0 0 0 2.200 m 8,9 19.580
6.
PEHD pipe SDR 11,
De = 140 mm
0 0 0 1.100 m 11,1 12.210
7.
PEHD pipe SDR 11,
De = 160 mm
0 0 0 2.500 m 14,5 36.250
8.
PEHD pipe SDR 11,
De = 200 mm
0 0 0 3.600 m 22,7 81.720
9.
Pumping stations
completely mounted
3 pcs 80.000 240.000 0 0 0 Price S.P. ISPA
Note: in the gravity system the
wall support and dewatering
works in trenches deeper than
3 m are not included.
The rebuilding costs for the roads
where collectors are installed
under the street, were not taken
into consideration in the gravity
cost estimate.
10.
Collection chambers
(connection chambers)
480 pcs. 1.200 576.000 220 pcs. 2.000 440.000
Prices
Bilfinger WT
January 2012
11. Vacuum station 0 0 0 1 pc. 197.000 197.000
12. Monitoring system 0 0 0 1 pc. 92.000 92.000
13. Special fittings 0 0 0 1 set 252.000 252.000
14. Air admittance stations 0 0 0 6 pc. 10.000 60.000
15. Buffer tank 0 0 0 3 pc. 10.000 30.000
16. Vacuum building 0 0 0 1 pc. 35.000 35.000
17.
Excavations + filling +
compacting
50.000 m³ 18,15 907.500 € 10.000 m³ 12,45 124.500 €
Prices Steel
Market
TOTAL C+M
(including mounting)
≈ 2.031.200 € ≈ 1.428.230 € − 602.970 € VI
Vacuum < VI
Gravit. approx. ≈ 30 %

30. Aqseptence Group GmbH
Vacuum Sewerage & Recovery Systems
Kinzigheimer Weg 104-106
63450 Hanau / Germany
Telephone +49 (6181) 309-0
roediger.water@aqseptence.com
www.aqseptence.com