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Resource Recovery: Sanitary landfills in the Philippines

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Geoffrey Teh

on 15 September 2013

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Transcript of Resource Recovery: Sanitary landfills in the Philippines

Sanitary landfills - most appropriate waste disposal method in the Philippines

Resource Recovery: Sanitary landfills in the Philippines
Solid Waste Management
Conventional Waste Disposal Methods
Open Dumpsite
Sanitary Landfill
an engineered facility carefully built into or on top of the ground where trash is isolated from the surrounding environment

To give a clear background on sanitary landfills
To study the potential contribution of landfills as a new method of solid waste disposal in the Philippines

Scope and Limitations
Based on the Philippine context
Background on sanitary landfills
Brief discussion on other solid waste management options

- Generation, collection, transfer and transport, processing and disposal of solid waste (Rep. Act 9003)

Table 1. Amount of solid waste generated per year by some countries, including the Philippines
(Global Waste Survey Final Report, International Maritime Organization, 1995).

Alternative waste management options:
Reduce waste deposited in landfills
Recycling materials
New waste treatment procedures

This presentation was brought to you by:
Miranda, Anton
Balite, Alyssa
Gacias, Kirk
Gutierrez, Ryan
Teh, Geoffrey

Burning of solid waste in moving grates in refractory-lined chambers
Burns 85-90% of combustible waste
Produces CO2,H2O, SOX , NOX and other greenhouse gases
Banned in the Philippines (Clean Air Act)

Degrading organic matter by aerobic microorganisms
Refuse is segregated to remove recyclables
Decomposes after 3 weeks

most conventional in the Philippines
land where solid waste is thrown or buried without segregation
Causes air and water pollution
10 in Metro Manila (e.g. Payatas dumpsite)
Facing closure (Rep. Act 9003)

Open Dumpsite
Alternative Waste Management Options
Requirements of a Sanitary Landfill
Full or partial hydrogeological isolation
Formal engineering preparation
Permanent control
Planned waste emplacement and covering

Bottom liner
Separates and prevents buried waste from coming in contact with natural soil and groundwater
Made of clay soil or plastic

Parts of a Landfill
Area in a landfill that has been constructed and approved for disposal of waste
Range in size, depending upon total tons of waste received each day up to 20 acres

Leachate Collection System
Series of perforated pipes, gravel packs and a layer of sand or gravel placed in the bottom of the landfill
Collects and removes leachate, or liquids trapped inside the landfill

Storm Water Drainage
Engineered system designed to control water runoff during rains or storms
Directs runoff water through a series of berms or ditches to holding areas known as sed ponds

Methane Collection System
Series of pipes embedded within the landfill to collect methane gas, a result of anaerobic decomposition of waste

Cover or cap
Daily cover of cells with six inches of compacted soil or alternative daily covers
In order to isolate waste from exposure to the air and animals such as birds, rats and mice
To control odors

Groundwater Monitoring Stations
Stations set up to directly access and test the groundwater around the landfill for presence of leachate
Series of wells that are located up-gradient and down-gradient of the landfill disposal area

Volume of solid waste can increase with little addition of equipment and manpower
Can contain large amounts of solid waste and can also be monitored properly.
No open burning
Captures natural gases which can be used as an alternative source of energy.
Filled land can be reclaimed for land development

More expensive to build
Rate of decomposition is very slow
Surrounding environment is more prone to pollution
Release of methane in the atmosphere
Poor maintenance can cause serious health effects to nearby communities
Lack of remediation measures leaves soil of filled lands contaminated

Landfills in the Philippines
Landfills in the Philippines
There are currently 72 active sanitary landfills in the Philippines that serve 55 local government units (NSWMC).
Compliance to Republic Act 9003,which outlaws open dumpsites.
The DENR is monitoring LGU’s that do not comply with the act
In 2011, there were 1,172 open dumpsites recorded, wherein 535 of these are already under rehabilitation and closure

Related News
2000 – Payatas tragedy
– Closure of San Mateo and Carmona landfills in Rizal
2001 – Republic Act 9003
2004 – First sanitary landfill to comply with Rep. Act 9003 constructed in Puerto Princesa
2011 – Reopening of San Mateo landfill
2012 – DENR lauds LGU’s of Visayas operating sanitary landfills

Calbayog City Landfill
Full transcript