1. Numfon Eaktasang ,Ph.D Thammasat University
Integrated Solid Waste Management
(PB389)
Numfon Eaktasang ,Ph.D
Thammasat University

2. Solid Waste Management
generation
Waste reduction
and separation at the source
Collection
Transportation
Separation, processing & transformation
Disposal

3. Disposal Methods Dumping on land Burial Hog feeding Incineration
Sanitary landfill
Composting
Biogas

4. Sanitary Landfill
Landfills are the physical facilities used for the disposal of residual solid wastes in the surface soils of the earth.
The safe and reliable long-term disposal of solid waste residue is an important component of integrated waste management.
Solid waste residue are waste components that are not recycled, that remain after processing at a materials recycle facility, or that remain after the recovery of conversion products and/or energy.

5. Sanitary Landfill

6. Engineering Concerns of Landfill
Controlling release of landfill gases
(odor, flammable, greenhouse effect)
Controlling release of leachate
Prevention of breeding and harboring of disease vectors
Prevention of hazardous gas release

7. Types of Landfill Sanitary Landfill – municipal solid waste
Secure Landfill – hazardous waste

8. Sanitary Landfill Method
Dumping and Compaction
Daily cover
Intermediate cover
Final cover
~ cm
~ 15 cm
~ 30 cm
~ 60 cm

9. Landfilling Methods 1. Area method Higher groundwater level
Temporary cover materials used

10. Area method
Final cover
Solid waste cells
Original ground

11. Landfilling Methods 2. Trench Method Lower ground level
Excavated soil used of daily and final cover
Higher groundwater level > 1 m

12. Trench Method
Final cover
Solid waste cells
Original ground

13. Trench Method

14. Landfilling Methods
3. Canyon Method
Depend on area or topographical

15. Canyon Method

16. Landfill Site Considerations
Haul distance, site access
Location restriction (near airports, floodplain, wetlands, faults, seismic impact zones, unstable areas)
Available land area
Environmental condition (soil, topographical, climate, surface water, geological, hydro-geological, local)
Potential ultimate uses for completed site

17. Landfill System Landfill Liner Leachate Collection System
Methane Gas Collection System
Landfill Cover
Monitor Groundwater System

18. Required Landfill Area
Ex1:
Population = 32,000 persons
Generation rate = 3 kg/person/day
Compacted specific weight of solid wastes in landfill = 480 kg/m3
Average depth = 3 m
Estimate the required landfill area in one year

19. Required Landfill Area
Solution: 1. Waste generation = 32,000 persons × 3 kg/person/day = 96,000 kg/day 2. Volume of waste Volume of waste = Waste generation Compacted specific weight = 96,000 kg/day 480 kg/m3 = 200 m3 /day

20. การคำนวณขนาดพื้นที่บ่อฝังกลบ
Solution: 3. Required landfill area = Volume of waste Average depth = 200 m3 /day 3 m = m2 /day x 365 days = 24,333 m2 /year

21. Wastewater Management
Leachate is wastewater from organic wastes degradation
Leachate
Precipitation
Percolation into waste
Surface runoff
Evapotranspiration

22. Composition of Leachate
Parameters
Landfill aged
< 2 yrs
Landfill aged >10 yrs
BOD (mg/L)
2,000-30,000
COD (mg/L)
3,000-60,000
TSS (mg/L)
200-2,000 pH
Sulfate (mg/L)
50-1,000
20-50

23. Leachate Controlling System
1. Compacted soil 2. Geomembrane liner : High-density polyethylene (HDPE) 3. Granular soil or sand
Leachate collection system
Granular soil
Geomembrane liner
Compacted soil

24. Leachate Controlling System

25. Leachate treatment System
On-site treatment
Off-site treatment

26. Landfill Gases Controlling System

27. Energy Recovery of Landfill Gases

28. Advantages Not complicate Variety types of solid wastes
Final disposal method
Energy recovery

29. Disadvantages Required large area High cost for transportation
Odors, vector diseases

30. Thank you for your attention^^