An Innovative Sanitary Landfill System With Dredged Marine Soils (Dms) as Liner Material: Geo-Environmental Studies

Abstract

ABSTRACT:The dredging process in Malaysia commonly ends with the dredged material being disposed offshore in designated dumpsite. Nowadays the disposal of dredged marine soils (DMS) into the sea is gradually being discontinued in developing countries due to concerns for the marine environment. Hence, such large volumes of DMS have created a greater challenge for sustainable disposal practice. Recently, a number of studies have reported the potential of DMS as a raw material for transformation into useful products of economical value. Since marine soils such as them are considered harmless, the construction of landfill barriers can be potentially carried out by using this material. This paper aims to determine the ability of DMS to be used as a liner material as geosorbent to remove pathogenic bacteria in landfill leachate. The DMS are subject to a variety of physical and chemical tests. Findings from this study showed that hydraulic conductivity of DMS was within the range stated in the standards for liner material. Based on the result, it is found that the bacteria were able to survive in such extreme salinity at neutral pH condition. Taken together, these results suggest that the use of DMS as liner material in landfill site will help to remove the bacteria in landfill leachate.

Hydraulic Conductivity Characteristics of a Fine-Grained Soil Potential for Landfill Liner Application

“…The values for liquid limit and plasticity index are subsequently used as inputs for soil classification in addition to the percentage fines discussed in the previous subsection. 3 12.59…”

“…The use of compacted soil lining with or without admixture of clay is common due its relatively low cost, accessibility, durability, high resistance to heat, and other factors among other liner materials [1]. Some marginalized materials are also studied as potential landfill liners such as residual soil [2], dredged marine soils [3], compost [4], fly ash used as soil treatment in combination with bentonite [5] among others. Published literature on the use of compacted soil in the Philippines as landfill liner is limited.…”

Compaction Characteristics of a Fine-Grained Soil Potential for Landfill Liner Application

“…A study was made utilizing local materials from Bais City, Negros Oriental as clay liner in the implementation of SLF [2]. Other studies considered some marginalized materials as landfill liners such as residual soil [3], dredged marine soils [4], compost [5], fly ash used as soil treatment in combination with bentonite [6] among others. Compaction is essential in the preparation of a well-compacted soil liner in a sanitary landfill to avoid or minimize the migration of leachate and thereby reduce the risk of groundwater pollution [7].…”