This document discusses the sanitary landfill project in Dompe, Sri Lanka. It provides background on solid waste management issues in Sri Lanka, including that the country generates over 6,000 tons of waste per day but only collects around 2,700 tons. It then describes the "Pilisaru" National Solid Waste Management Project and the plan to establish Sri Lanka's first sanitary landfill in Dompe as a pilot project. The document outlines the design of the landfill, including liner systems, leachate collection, gas recovery, and monitoring systems. It notes there was public protest against the landfill but also awareness programs. The document discusses pros and cons of the project and provides recommendations.

1. R.M.T.D. Madusanka,
AS2012135.
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2. ……………….Content………………….
1) What is a Landfill?
2) Sri Lankan scenario
3) “Pilisaru” National Solid Waste Management Project.
4) Sanitary landfills for sri Lanka
5) Landfill to Dompe as a pilot project.
6) The first ever “state-of-the-art sanitary landfill” of sri Lanka
7) Public awareness programmes & Protests.
8) Approvals & Constructions
9) Life time & post closure plan
10) Design of the landfill
11) Pros & Cons
12) Recommendations
13) Resource persons
14) References
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3. What is a Landfill?
A site where waste is isolated from the
environment until it is safe.
(until completely degraded biologically, chemically and physically.)
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4. Sri Lankan scenario…
 Sri Lanka generates around 6400 tons of wastes per day
-2700 tons collected by local authorities & buried.
-3700 tons are thrown away at road sides. waterways &
wetlands.
 Colombo municipal area generates around 700 tons of
wastes per day.
 Sri Lankan government annually spends roughly
Rs 3 billion in solid waste management
(source:-Ministry of environment & renewable energy)
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5. “Pilisaru” National Solid Waste
Management Project.
 Established in the CEA with effect from 1st January 2008
 with the participation of other government organisations, specially Urban
Development Authority private Institutions, NGOs & experts in this field.
Main objectives.
1) Development of a National Policy on Solid Waste Management.
2) Development of a National Strategy on SWM.
3) Effective education & awareness for all stakeholders on SWM including
training & capacity building.
4) Facilitation for LAS for implementation of SWM projects / programs.
5) Legal reforms to strengthen effective law enforcement.
5LANDFILLS

6. Sanitary landfills for
sri Lanka…...
 Construction of low cost
sanitary landfills for disposing
residual waste is a key activity
of “Pilisaru” project.
❖ Government of korea agreed to
provide technical and financial
assistance in this case.
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7. Landfill to Dompe as
a pilot project.
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❖ The Korean Government channelled
through KOICA, provided $ 4.5 million as a
grant to establish a fully engineered state-
of-the-art sanitary landfill in Dompe,
Gampaha District.
❖ A commercial forest plantation of Acacia &
Pinus in Maligawatte owned by forest department
selected as the landfill site.

8. The first ever “state-of-the-art
sanitary landfill” of sri Lanka...
what is a state-of-the-art sanitary landfill?
❖ A landfill includes,
-Liner system
-Leachate collection & treatment system
-Cap system
-Gas recovery system or flaring system
-Landscaping
-Groundwater & gas monitoring system
❖ also require about 30 years of post closure monitoring & planning for
eventual community use
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9. Public awareness
programmes & Protests.
❖ There was a enormous public protest demonstrated
against the proposed sanitary landfill site at Dompe.
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❖ 60 pocket meetings and 8
special Pilisaru Parisara
Gammana Programmes
were conducted in Dompe
area

10. Approvals…
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11. Constructions...
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12. 12

13. 13

14. 14

15. 15

16. 16

17. 17

18. 18

19. Life time & post closure plan….
 Originally planed for 6 years.(90tons per day)
 When restricted to dompe PS area due to
public protest,
 Eco-park is planed to establish on the Landfill
area after closure.
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-Average waste collecting in Dompe PS area per day lies
between 5-10 tons.
-Life time will enhance at least up to 100 years???????

20. 20

21. Design of the landfill.
❏ Leachate control system
❏ Leachate collection system
❏ Leachate treatment
❏ Ground water & storm water collection system
❏ Gas emission system
❏ Monitoring system
❏ Compost plant 21

22. Leachate control system.
➢ Cell system
-Minimize the leachate generation
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23. Leachate control system… cont.
➢ Liners,
1.Bottom & sides of the landfill.
2.composite liner system.
-Geotextile layer
-Compacted clay layer
-HDPE layer
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24. Cross section of the Lining system.
Gravel cover
Leachate collecting pipe
Geotextile layer
HDPE layer
Compacted Benthonite layer
Geotextile layer
Ground water collecting pipe
Compacted existing soil
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25. Leachate collection system.
➢ Perforated pipe system.
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26. Leachate treatment.
➢ Activated bioreactor.
➢ Hambu Pan(Typha angustifolia)
pond.
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27. Ground water & storm water
collection system.
➢ Perforated pipe system for ground water collection.
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➢ A canal around the landfill to storm
water collection.

28. Gas emission system.
➢ Collecting CH4 as a fuel will not cost effective since
this is a small landfill.
➢ Gas flares are designed.
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29. Monitoring system.
➢ Ground water monitoring system only.
-Two tube wells,
-Two nearby residential wells.
➢ No gas monitoring system.
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30. Compost plant.
➢ Organic matter separates from the non degradable
wastes.
➢ Use for composting.
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31. Pros…..
1. Landfilling is a sustainable solution for the SWM
difficulties in the Dompe PS area.
2. There will be no need to relocate any
households/families due to the operation of the project
activities.
3. There will be job opportunities for the unemployed
personnel in area.
4. Having a well planned monitoring system supervised by
monitoring committee.
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32. Pros……CONT…
5.Low pollution & other issues.
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33. Pros……CONT….
6. No threatened and endemic species are found in the
proposed area.
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34. Pros…CONT…
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35. 7. organic materials of MSW will be
sorted & recycled.
-Enhance the lifetime of
the landfill.
-Expect a annual income
Of Rs10.06million.
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Pros……CONT…

36. Pros…..CONT…
8. Proper design,
-Retention tank to store leachate.
-Tyre washing basin
9.
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Retention Tank
A buffer zone established around the
landfill with canopy trees(acasia).

37. Cons….
1. Treated leachate & stormwater discharge
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-To a narrow irrigation canal in
nearby paddy field.
-Problem of local floods.

38. Cons……. CONT..
2. There is a nearby(20m downstream) wetland
close to the site.
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vegetable farms.
Paddy field.

39. Cons……. CONT..
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3. Surface water
drainage pattern in
the area is not
properly identified.
-canal around the landfill
overflows in rainy days.

40. Cons……CONT….
4. Probability of contaminate the intake of
Ranpokunugama potable water treatment plant.
Effluent canal pugoda ela kelani river
Intake
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41. Recommendations…
1. Set a funding plan as no shortage of funding for
environmental monitoring.
2. Collect the leachate & send to a waste water
treatment plant for the treatment.
3. Establish a sufficient canal system to drain out
treated leachate & storm water.
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42. Recommendations…CONT…
5.Establish a protective system for liners & leachate
collection system.
-Remove sharp objects in the sorting.
-Wheels of operating vehicles get away
6. Conserve similar habitats in the adjacent
areas.
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from the leachate collecting pipe system.

43. Resource persons…
Mr.Chathura Malwana
Site manager,
Dompe sanitary Landfill.
Mr. Kosala W. Gunawardena.
Project officer,
construction of solid waste disposal facilities project,
Central Environmental Authority.
Mr.Rohana priyantha & U.Weerakkodi
Dompe Surakeeme Sangvidanaya
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44. References…...
1. Initial Environmental Examination Report for Proposed Final Disposal
Facility, at Maligawatte, Dompe 2009 august.
2. National ‘Pilisaru’ Waste Management Programme-J. Fernando Central
Environmental Authority, Sri Lanka.
3. http://www.iiirr.ucalgary.ca/files/iiirr/256.pdf
4. Environmental Profile ,Dompe Divisional Secretariat 2001.
5. http://rdissanayake.blogspot.com/2012/06/moon-plains-sanitary-
landfill.html
6. http://www.academia.edu/3694817/ Landfill site selectiln & evaluvation
of Gohagoda Udapalatha dump sites,kandy district
7. http://www.bc.edu/bc_org/avp/cas/fnart/fa267/bos_fill.html
8. http://www.sundayobserver.lk/2013/09/22/fea11.asp
9. Technical guidelines on solid waste management in sri lanka. Prepared by
pollution control unit of CEA
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45. THANK
YOU !
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