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
Dec
-06
Feb
-07
Ap
r-07
Jun-
07
Aug
-07
Oct
-07
Dec
-07
Feb
-08
Ap
r-08
Jun-
08
Aug
-08
Oct
-08
Dec
-08
Feb
-09
Ap
r-09
Jun-
09
Aug
-09
Oct
-09
Dec
-09
Feb
-10
Ap
r-10
Jun-
10
Aug
-10
Oct
-10
Dec
-10
Feb
-11
Ap
r-11
Jun-
11
Aug
-11
Oct
-11
Dec
-11
Feb
-12
Ap
r-12
Jun-
12
Aug
-12 W
aste
tonn
age
(T)
Month
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
Top Related