5. Conclusions and recommendations
Technical Landfill Centres (TLCs) are sets of facilities which constitute objects of particularly developed
engineering studies. Their lifetime exceeds largely the end of their operational life. Waste Stabilisation, namely their
evolution towards a definite and unchanging physicochemical state, starts once these wastes are deposited and it
usually continues during many decades. The expertise perfomed both in Naama and Mecheria helped us to highlight the kind of difficulties associated
with design and operating conditions of the two areas of study. These difficulties can be summarized as follows:
&ORJJLQJGUDLQVRIODQGILOOFHOOV39&GUDLQVDUHclogged or broken under waste weight because of small numbers
of holes. Added to that the drainage blanket, made up of crushed gravel which consists mainly of limestone, as it
gets in touch with leachate, it creates a thin layer which reduces the drainage process.
6XE-si
6XE-sizing retention basins and absence of leachate treatment before discharge into the environment.
Among the recommendations we suggest for an efficient and continuous management of TLCs, we can say the
following:
8VHRI+'3(GUDLQVWKDWKDYHGLDPHWHUVJUHater than 300 mm and a drainage blanket made up of 30/40-diameter
rolled up flint.
6L]LQJOHDFKDWHUHWHQWLRQWDQNVRQWKHEDVLVRIDIXOOZDWHUEDODQFHDQGSODQQLQJOHDFKDWHWUHDWPHQWinside the TLC.
,QVWDOOLQJSUHVVXUHPHWUHVinside the centre.
References
[1] MATE. Mise e