Phase III of the Batumi municipal water project focuses on rehabilitating the rest of Batumi’s water and sewer facilities. It continues to expand into surrounding rural coastal areas. At a projected cost of 43.5 million EUR, phase III began in 2012 and expected to be finished in 2018. The project involves rehabilitating over 40km of sewer pipelines and constructing new sections, as well as a sewage pumping main and manholes, to improve wastewater collection and prevent pollution of the Black Sea.

1. Rehabilitation of Municipal Water Supply &
Wastewater Infrastructure in Batumi - Phase III
Lot 4-1
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 1

2. Project Phases:
■ The Batumi Project is divided into four phases, each of which is implemented by the Municipality of Batumi:
 Phase I consisted of rehabilitation measures for the water and sewer supply facilities in parts of the old
town of Batumi. Phase I had an investment cost of 18.5 million EUR and was implemented from 2007
until 2012.
 Phase II extends the rehabilitation measures of phase I to more parts of the city and also to nearby
coastal villages south of Batumi. This phase also builds a new waste water treatment plant for Batumi.
At a cost of 47 million EUR, phase II has been implemented between 2009 and 2013.
 .
 Phase IV concerns the rehabilitation and extension of the water supply network and the rehabilitation of
the sewer system in Batumi (new city boundaries). The Project covers the continuation of Project
Phases I-III that aim at a continuous and demand-oriented supply of the population with hygienically
sound water as well as an ecological and hygienically sound disposal and treatment of the wastewater
of Batumi. The estimated total investment cost of the Project Phase IV amount to approximately EUR
30 m.
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 2
Phase III of the Batumi municipal water project focuses on rehabilitating the rest of Batumi’s
water and sewer facilities. It continues to expand into surrounding rural coastal areas. At a
projected cost of 43.5 million EUR, phase III began in 2012 and expected to be finished in 2018.

3. Project Background & Scope
■ Project background - previous sewage disposal principle
comprised of individual & high rise residential buildings
being discharged to existing rainwater channels taking the
sewage directly into the Sea.
■ Project scope – environmental protection, prevention of
further Black Sea coast pollution, separation of sewage from
storm water collectors, abortion and prevention of further
sewage influx into Black Sea, improvement of quality of
coastal, bathing waters through rehabilitation and
construction of new sewerage systems within dense city
areas as well as surrounding coastal villages.
■ Lot 4-1 / Wastewater component:
 In total ~41km of sewerage pipelines, 690nr inspection
manholes, 2,190nr of house connection manholes.
 Gravity collectors L=32,8km (PP SN10, DN200-400mm, GRP
PN10 DN500, 800, 1000mm), with 661nr manholes, 2,184nr
house connection manholes.
 5.4km of pressure main (Steel PE/cem.mortar, DN1000mm)
with associated valves & washouts, combined type air valves
 One WW Shaft Pumping Station “Back Pull-Out” type (Q3=
2x57.3l/s @ 6,4m).
Section Collector
House
Connections
Manholes
(m) (pcs) (pcs)
Waste Water
Gravity Sewerage Networks
Remaining System A(RSA)
Steel (PE/cem.mort), DN250 187.00
PP SN10 (DN250-400) 12,842.00
GRP PN10, SN10,000 (DN500, 800) 482.00
Sub-total: 13,511.00 842.00 258.00
Swamp & South Swamp Area (SSA)
PP SN10 (DN200-400) 17,861.00 1,342.00 356.00
Sub-total: 17,861.00 1,342.00 356.00
Trunk Main Collectors
Collector "B"
GRP PN10, SN10 DN800-1000 2,557.00 47.00
In-lining DN1000, 1200 1,128.00
Sub-total: 3,685.00 47.00
Total - gravity sewers 35,057.00 2,184.00 661.00
Pressure Mains
Pumping Main "B"
Steel (PE/cem.mortar), DN1000 5,184.00 21.00
Total - pressure mains: 5,184.00 21.00
Total sewerage: 40,241.00 2,184.00 682.00
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 3

4. Objectives & Benefits
■ ObjectivesThe Batumi MunicipalWater Project aims to:
 Ensure a continuous supply of safe drinking water for the population of Batumi
 Reduce water losses and ensure efficient use of resources
 Guarantee a controlled and improved wastewater collection treatment system
 Provide regular testing and analysis of public drinking water so it is up to EU standards
 Cover operation and maintenance costs for BatumiTskali Utility by service fees
 Protect the water ecosystems of the Black Sea and Chakvi RiverWatershed
 Benefits:
 Prevents costly and pointless water loss
 Constructs a new low energyWWTP that has a solar drying system
 Achieves EU water quality standards
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 4

5. Lot 4-1
 Remaining System A (RSA) – dense city area
sewerage system remaining for construction
from Phase II of the Project;
 Swamp & South Swamp Area Sewage
Network (SSA) – located at the South-East
part of the city center with a high population
density, sewage previously discharged to
existing rainwater channels taking the
sewage directly into the Sea;
 Sewage Pumping Main B connecting main
WW PS B with WWTP Adlia; max. pressure 1,7
– 2,3bars.
 Collector B as trunk main is the most
important component of System B & System
C and hence its backbone as it conveys
collecting major lateral collectors and will
carry all the sewage from these areas to the
existing PS B and from there – to the WWTP
Adlia.
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 5

6. Remaining
SystemA (RSA)
 Covering dense city area sewerage system
remaining for construction from Phase II of
the Project:
 13,185m of sewerage city collectors (Steel
DN250mm, PP DN250-400mm, GRP
DN500-1200mm),
 258nr inspection manholes,
 842nr house connections.
 Sewage pumping station - “Back Pull-Out”
pump 2 x 57.3 l/s, H=6,4m; with double
HDPE wall housing (ID = 2,000 mm, SN4),
buoyancy preventive concrete casing.
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
6

7. RSA - Prefabricated concrete manholes:
Located at all changes of the vertical or horizontal alignment and at intervals not
exceeding 50m’ for primary & secondary sewer lines
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 7

8. RSA - HORIZONTAL
DRILLING:
CROSSING BELLOWTHE RAILWAY,
EXISTING STORM-WATER
CHANNELSWITH STEELCONDUIT
PIPEWITH CONCRETE SEALING
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in
Batumi - Phase III / Lot 4-1 8

9. RSA – Prefabricated concrete inspection manholes
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 9

10. RSA - Sewage
shaft PS A-1
“Back Pull-Out” pump:
 2 x 57.3 l/s, H=6,4m;
 Double HDPE wall housing;
 ID = 2,200 mm,
 OD = 2,433mm
 H=6,700mm,
 SN4,
 Buoyancy preventive concrete casing
class C25.
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
10

11. RSA - Construction phases - sewage shaft PS A-1 –
sheet piled excavation, concrete buoyancy preventive casing
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 11

12. RSA - Construction phases - sewage shaft PS A-1
installation of PS’ HDPE housing downstream from screen chamber with sluice gate valve
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 12

13. RSA - Construction phases - sewage shaft PS A-1
buoyancy preventive concrete casing surrounding HDPE PS
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 13

14. RSA - Construction phases - sewage PS A-1
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 14

15. RSA - sewage PS A-1
pumps (2 x 57.3 l/s, H=6,4m)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 15

16. RSA - sewage PS A-1
operation in 1+1 work regime of pumps (2 x 57.3 l/s, H=6,4m)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 16

17. RSA - sewage PS A-1
pumps (2 x 57.3 l/s, H=6,4m)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 17

18. Swamp & South
SwampArea Sewage
Network (SSA)
Located at the South-East part of the city center with a
high population density, sewage previously discharged to
existing rainwater channels taking the sewage directly
into the Sea: 17,664m of sewerage city collectors (PP
DN200-400mm), 1,424nr house connections;
New sewage network in the Swamp & South SwampArea
includes the following:
 14,223m of primary and secondary gravity sewer
collectors with diameters ranging PP DN250 –
DN400mm, with depths up to 5,0m;
 3,638m of tertiary lines (PP DN200mm);
 356nr manholes with depths up to 5,0m;
 889nr PP & 453 concrete HC manholes
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
18

19. SSA -Works
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 19

20. SSA –Works
Prefabricated Concrete Inspection manholes
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 20

21. SSA –Works
Prefabricated Concrete Inspection manholes
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 21

22. SSA –Works
House Connection PP-Manhole with 1 inlet / 1 outlet
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 22

23. SSA –Works
House Connection PP-Manhole with 3 inlets / 1 outlet
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 23

24. Sewage Pumping
Main B (PMB)
 Connecting main WW PS B with WWTP
Adlia;
 Steel pressure pipeline DN1000mm
(1,016X10/8.8mm), L=5,184m;
 PE coated / sulfate resistant cement
mortar lined;
 Max. pressure rating btw. pressure 1,7 –
2,3bars.
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
24

25. Sewage Pumping Main B (PMB)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 25

26. Sewage Pumping Main B (PMB)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 26

27. Sewage Pumping Main B (PMB)
Valve &Washout Manholes
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 27

28. Sewage Pumping Main B (PMB)
Concrete thrust blocks on DN1000mm pressure pipeline
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 28

29. Sewage Pumping Main B (PMB)/
Combined Air ReleaseValves
 Located on high-points of pumping mains,
designed to operate with sewage DN150,
PN10.
 Combined air valve discharges gases during the
filling or charging of the system, admits air to
the system while it is being emptied of liquid
and discharges accumulated gases from the
system while it is under pressure and
operating, combining air & vacuum.
 Additional isolating valve to permit inspection
and maintenance of the valve
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 29

30. Sewage Pumping Main B (PMB) – Crossing over the Mejinitskali River
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 30

31. SewageCollector B
Collector B (GRP DN800 - 1000mm,
L=2,557m) as trunk main is considered as
the most important component of System
B & System C and hence its backbone as it
conveys collecting major lateral collectors
and will carry all the sewage from these
areas to the existing WW PS B and from
there – over new Pumping Main B to the
WWTP Adlia.
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
31

32. Collector B
Comprises the following general issues:
Replacement of existing collector:
 Construction of 2,6 km of GRP DN800 &
DN1000mm sewer trunk main with invert
levels from 1,8m to 4,5m;
 Construction of 47 concrete manholes
with depths between 1,8 – 4,5m;
In-lining of existing collector:
 Rehabilitation of ~1,1km of existing
DN1000, 1200mm sewer trunk main by
trenchless technology with depths
varying between 4,0 & 8,0m
 Construction of 20nr manholes with
depths btw.4,0 & 8,0m
 Due to deteriorated status of existing
collector, in-lining was abandoned, new
DN1200 collector to be installed under
future project!
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 32

33. Sewage Collector B
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 33

34. Sewage Collector B
Multiple crossings with existing
installations
Collector route parallel to existing SW
channel
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 34

35. Collector B
Tertiary collectors – collection of HC above the trunk-collector
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 35

36. Sewage Collector B
Soil investigation – due to swamp area, replacement of subgrade material required below
pipe-invert level (H= 0.5 / 1,0m)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 36

37. Manholes
Manholes: prefabricated concrete manholes
located at all changes of the vertical or
horizontal alignment and at intervals not
exceeding 50m’ for primary & secondary
sewer lines.
In-situ concrete manholes are considered at all
changes of the vertical or horizontal
alignment and at intervals not exceeding
70m’ in straight line for theTrunk Main
Collector B.
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
37

38. Quality Control
 Trench subgrade soil analysis;
 Pipeline alignment, invert elevations;
 Pipe trench bedding & backfilling compaction
level;
 Ultrasonic testing on welded joints;
 Tightness testing of WW system (collector,
manhole, house connections);
 CCTV inspection of collectors;
 Standard concrete testing (Slump,
Compressive strength,…);
 Material inspections on delivery and
installation
Rehabilitation of Municipal Water Supply & Wastewater Infrastructure in Batumi - Phase III /
Lot 4-1
38

39. QC / Prefabricated concrete curing pools, compressive strength
testing
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 39

40. QC / material inspections on delivery
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 40

41. QC /Tightness testing of gravity sewers
as per EN1610
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 41

42. QC / CCTV Inspection
(closed circuit television) as per ATV M 14, part 2
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 42

43. Health & Safety
Regular Safety Patrols preventing potential accidents
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 43

44. Materials:
prefabricated concrete manholes / curing pools
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 44

45. Materials:
prefabricated concrete manholes (for collectors DN200-400)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 45

46. Materials:
prefabricated concrete manholes for large pipe diameters (DN500 – 1200)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 46

47. Materials:
prefabricated concrete manholes for connections / crossing with large pipe diameters (DN500 –
1200)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 47

48. Materials:
Manhole covers, dirt (sand) traps - B125, LW800-D400 (Meier Guss, Germany)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 48

49. Materials:
GRP Pipe material – SN10000, DN500-1200 (Superlit,Turkey);
Rehabilitation of MunicipalWater Supply &Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 49

50. Materials:
PP Pipe material – KG2000, SN10, DN150-400 (Wavin,Germany)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 50

51. Materials:
Steel pipes, Epoxy coated / sulfate resistant cement lined, (NOKSEL,Turkey)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 51

52. Material:
Steel pipes, Epoxy coated / sulfate resistant cement lined, (HATBORU,Turkey)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 52

53. Materials:
House connection manholes (Wavin, Germany)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 53

54. Materials:
Valves, fittings (VAG, Germany)
Rehabilitation of MunicipalWater Supply & Wastewater Infrastructure in Batumi - Phase III / Lot 4-1 54