Investigation on the potential application of hybrid Alum Sludge and Non-Biodegradeble Plastic Waste (food plastic packaging) as an alternative materials in sustainable landfill infrastructure model / Nurhanem Syarhida Isa

The abundance of Alum Sludge (AS) has been directed to the reduction of storage capacity for keeping of waste, as well as the increment of Non-Biodegradable Plastic Waste (N-BPW) in the landfill is reflected to the limited spaces, thus require more spaces to be constructed. In addition, the uncontrolled waste dumping into the landfill caused environmental problem. However, clay liner, which used as the conventional final impoundment is depleting and a high in cost. Therefore, AS and N-BPW (FPP) need to be recycled and reused to reduce the burden in the landfill and environmental problem such as contaminant of underground soil by leachate. In this study, hybrid AS and N-BPW (FPP) were investigates on the potential as a sustainable landfill liner materials in term of its ability to react toward some pollutants. The hybrid models was prepared in a ratio of 2:3:2 (AS:KC:Mixed AS and KC). In this study, N- BPW (FPP) is fabricated using the application of hot pressing method. N-BPW (FPP) Liner were fabricated in term of two thickness namely 2mm and 5mm. In this research, AS and N- BPW (FPP) Liner were investigated and compared with the conventional geomembrane and kaolin clay (KC) in terms of physical, chemical and geotechnical characteristics. Finding shows that N- BPW (FPP) liner have high tensile strength which is 488.011 N and 1724.07 N respectively, while geomembrane only reaches 230.598 N. N-BPW (FPP) have 70% similarity of chemical composition to geomembrane. The AS and KC have high permeability value which is 4.79 x 10-6 m/s and 3.94 x 10-7m/s. Moreover, the concentration of TSS shows the reduction value when subjected to the hybrid AS and N- BPW (FPP) as an adsorption media. Obtained result shows that the proposed AS and N- BPW (FPP) liner can be used as an alternative materials for landfill.