MARE CHICOSE

SANITARY LANDFILL

•Brief history of Mare Chicose Landfill Site •Site operation activities •Construction works •Environmental monitoring •Health and Safety

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

MARE CHICOSE SANITARY

LANDFILL Site Activities: • Construction of waste cells • Waste reception • Leachate management • Gas management • Capping

MARE CHICOSE SANITARY

LANDFILL Construction works - Construction of cells

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

•

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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(T)

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Waste trend

MARE CHICOSE SANITARY

LANDFILL Site Operation Activities - Waste Reception 2. Tipping/Levelling/Compaction of wastes

MARE CHICOSE SANITARY

LANDFILL Site Operation Activities - Waste Reception 3. Daily cover [Biodegradable synthetic cover Or Soil

cover]

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

MARE CHICOSE SANITARY

LANDFILL Site Operation Activities - Leachate Management

Leachate Pond

MARE CHICOSE SANITARY

LANDFILL Site Operation Activities - Gas Management 1. Drilling of vertical gas wells (65)

Site Operation Activities - Gas Management 2. Construction of horizontal gas wells (35)

MARE CHICOSE SANITARY

LANDFILL

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]

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

MARE CHICOSE SANITARY

LANDFILL Site Operation Activities - Gas Management • Gas Monitoring at manifold using a mobile gas analyser

(GEM 2000 and GA 2000)

MARE CHICOSE SANITARY

LANDFILL Construction works – Capping 1. Temporary capping – Using 0.75mm LDPE geomembrane

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

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

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

THANK YOU

MARE CHICOSE SANITARY

LANDFILL