mare chicose sanitary landfillglobalmethane.org/documents/events_land_120910_24.pdf · mare chicose...
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MARE CHICOSE
SANITARY LANDFILL
•Brief history of Mare Chicose Landfill Site •Site operation activities •Construction works •Environmental monitoring •Health and Safety
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MARE CHICOSE SANITARY
LANDFILL Brief history of Mare Chicose Landfill Site
MARE CHICOSE LANDFILL
Located in southern part of the island on an area of approx. 45 ha
Consists of 7 waste cells (1-7) [ 78%], site infrastructure, degassing unit with gas engines [10%] and unexploited plot[ 12%]
Started operation by STAM since late 1997 until November 2006
December 2006 - December 2016 operating by the Joint Venture eneotech/Sotravic Ltee Contract value: USD 38 Million Variation :USD 6.5 Million
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MARE CHICOSE SANITARY
LANDFILL Site Activities: • Construction of waste cells • Waste reception • Leachate management • Gas management • Capping
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MARE CHICOSE SANITARY
LANDFILL Construction works - Construction of cells
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Waste Reception 1. Weighing of waste trucks [ Approx. 1,100T of wastes received per day. Out of this 95% is domestic wastes and The remaining are wastes like tyres, sludge, poultry wastes and condemned products
•
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Waste Reception Incoming wastes are from: • the 5 transfer stations [80% to 85% of the total wastes] • the south or private generators [ 15% to 20 %] • Since 1997 until August 2012 – 5,084,974.32T of wastes
received
0.000 10,000.000 20,000.000 30,000.000 40,000.000 50,000.000
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aste
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Waste Reception 2. Tipping/Levelling/Compaction of wastes
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Waste Reception 3. Daily cover [Biodegradable synthetic cover Or Soil
cover]
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Site Operation Activities - Leachate Management • Average annual rainfall – 2400 to 3000mm • Raw leachate is stored in leachate ponds [3nos] and
carted away in tankers to Roche Bois Treatment Plant. Average distance covered per trip – 96km
MARE CHICOSE SANITARY
LANDFILL
YEAR TOTAL RAINFALL (mm) TOTAL VOLUME (m3)
2007 2622 110,878 2008 2955 161,248 2009 2776 165,378 2010 2643 160,366 2011 2481 168,285
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Leachate Management
Leachate Pond
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Gas Management 1. Drilling of vertical gas wells (65)
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Site Operation Activities - Gas Management 2. Construction of horizontal gas wells (35)
MARE CHICOSE SANITARY
LANDFILL
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Gas Management • Gas wells connected individually to a manifold • Manifold to the degassing unit through a main gas pipe
[End of line system]
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Gas Management • Captured methane gas is used to generate electricity
and/or flaring
Two Generators each with a capacity of 2.15Mwh
Two Degassing unit each with a capacity of 1500Nm3/h
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MARE CHICOSE SANITARY
LANDFILL Site Operation Activities - Gas Management • Gas Monitoring at manifold using a mobile gas analyser
(GEM 2000 and GA 2000)
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MARE CHICOSE SANITARY
LANDFILL Construction works – Capping 1. Temporary capping – Using 0.75mm LDPE geomembrane
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MARE CHICOSE SANITARY
LANDFILL Construction works – Capping 2. Permanent Capping – [1.5mm LDPE geomembrane, geotextiles, drainage layer, soil and grassing]
Permanent capping on going
Permanent capping
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MARE CHICOSE SANITARY
LANDFILL Environmental Monitoring • Leachate analyses – Monthly • Ground water and Surface water analyses – Quarterly
[Jointly with CWA and MoE] • Gas Migration monitoring – Monthly • Dust Control – through water spraying/low speed -
Monthly • Installation of flies traps - Weekly • Fogging - Weekly • Larviciding - Weekly
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MARE CHICOSE SANITARY
LANDFILL Health and Safety • Vaccination of all people working on site • Provision and Ensuring that people are wearing their
PPE • Fire Drill twice yearly • Health and Safety committee every month
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THANK YOU
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MARE CHICOSE SANITARY
LANDFILL