Assessment of microsilica as a value-added material for municipal solid waste clay liner system

2012 ◽  
Vol 10 (2/3) ◽  
pp. 321
Author(s):  
G. Venkatesan ◽  
G. Swaminathan ◽  
V. Srihari
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Value Added ◽  
Clay Liner ◽  
A Value ◽  
Liner System

Effects of Geomembrance on the Contaminant Transport in Compacted Clay Liner System

2014 ◽  
Vol 989-994 ◽  
pp. 1208-1211 ◽  
Author(s):  
Jing Jing Fan
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Compacted Clay ◽  
Seepage Rate ◽  
Clay Liner ◽  
Compacted Clay Liner ◽  
State Process ◽  
Liner System ◽  
Municipal Solid Waste Landfills ◽  
Solid Waste Landfills

An analytical model is established to predict the seepage performance of the liner system composed of a compacted clay liner (CCL) covered by a geomembrane (GM). The contaminant of Pb2+diffusing through the geomembrane is assumed to be a steady-state process. The liner systems with low leakage performance are usually utilized in the municipal solid waste landfills to prevent the contaminants of the leachate from polluting the groundwater and soil beneath the landfill. To investigate the seepage rate of the Pb2+in the liner systems of the landfill considering the effects of the geomembrance, the influence of the geomembrance on the seepage performance of the liner system is studied. Parametric analyses are conducted to study the effects of the thickness of GM and the number of defects in the GM on the leakage performance of the liner system. In conclusion, some suggestions for the design of the municipal solid waste landfills are proposed based on the analyses results.

scholarly journals Solid Fuel from Oil Palm Biomass Residues and Municipal Solid Waste by Hydrothermal Treatment for Electrical Power Generation in Malaysia: A Review

2019 ◽  
Vol 11 (4) ◽  
pp. 1060 ◽  
Author(s):  
Norfadhilah Hamzah ◽  
Koji Tokimatsu ◽  
Kunio Yoshikawa
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Hydrothermal Treatment ◽  
Solid Fuel ◽  
Oil Palm ◽  
Electricity Generation ◽  
Palm Kernel ◽  
Value Added ◽  
Energy Potential ◽  
Coal Consumption

Malaysia generated 156,665 gigawatt-hours (GWh) of electricity in 2016 of which the biggest share of 48.4% was sourced from coal and coke. Malaysia coal consumption was met by 90.5% of imported coal due to high demand from the power sector. Malaysia also has a vast biomass resource that is currently under-utilised for electricity generation. This paper reviews the potential of oil palm residues and municipal solid waste (MSW) for alternative coal replacement employing hydrothermal treatment (HTT). In 2017, about 51.19 million tonnes (Mt) of oil palm waste was available with 888.33 peta-joule (PJ) energy potential to generate 88.03 terawatt-hours (TWh) electricity from oil palm fronds (OPF) and oil palm trunks (OPT), empty fruit bunch (EFB), mesocarp fibre (MF), palm kernel shell (PKS) and palm oil mill effluent (POME). Meanwhile, the MSW energy potential and electricity generation potential was estimated at 86.50 PJ/year and 8.57 TWh/year, respectively. HTT with washing co-treatment eliminates the use of drying for converting range of biomass and MSW into clean solid fuel known as hydrochar. The hydrochar increased in caloric value with lower moisture, Potassium (K) and Chlorine (Cl) contents. These value-added fuels can be used as coal alternative and reduce dependency on imported coal for energy security in Malaysia.

Influence of Compact Clay Layer on the Seepage Performance of the Municipal Solid Waste Landfills

2014 ◽  
Vol 908 ◽  
pp. 503-506
Author(s):  
Jing Jing Fan
Keyword(s):  
Municipal Solid Waste ◽  
Solid Waste ◽  
Clay Layer ◽  
Municipal Solid Waste Landfill ◽  
Waste Landfill ◽  
Low Leakage ◽  
Liner System ◽  
Compact Clay ◽  
Municipal Solid Waste Landfills ◽  
Solid Waste Landfills

The pollutants in the municipal solid waste landfill leachate result in severe damage to the environment of the groundwater and the soil beneath the municipal solid waste landfill. The liner systems with a low leakage performance are commonlly adopted under the municipal solid waste landfills to stop the contaminants of the leachate from polluting the environment. Even there are the rigorous demands in related specifications for the design of the liner system in the landfill. Pollution of the groundwater and the soil beneath the landfill still occurred in a large number of rubbish landfills because of the seepage. To investigate the influence of the compact clay layer (CCL) on the seepage performance of the liner systems, parametric analyses are conducted to study the influence of the thickness of CCL and the hydraulic conductivity of CCL on the leakage performance of the liner system. In conclusion, some suggestions for the design of the municipal solid waste landfills are proposed based on the analyses results.

Modeling deformation behaviour of clay liners in a small centrifuge

2002 ◽  
Vol 39 (6) ◽  
pp. 1406-1418 ◽  
Author(s):  
B VS Viswanadham ◽  
K V Mahesh
Keyword(s):  
Solid Waste ◽  
Deformation Behaviour ◽  
Model Tests ◽  
Centrifuge Modeling ◽  
Waste Materials ◽  
Clay Liners ◽  
Overburden Pressure ◽  
Clay Liner ◽  
Geotechnical Centrifuge ◽  
Liner System

In modern solid waste landfills, liner systems are essential structural elements that ensure that waste materials are safely separated from the environment. Many liner systems have been developed and used over the past decade. Among impermeable layers, clay liners are regarded as one of the very significant components of liner system and are being used worldwide as a waste containment system in landfills. One of the failures associated with clay liners is the occurrence of nonuniform settlements, resulting from the sudden collapse of waste, or the decomposition of waste materials, and (or) the subgrade over which the liner is laid. This paper deals with the use of a small centrifuge to model the deformation behaviour of clay liners. Model tests were performed in a small geotechnical centrifuge to investigate the behaviour of clay liners in landfills subjected to nonuniform settlements at sharp curvatures. A parametric study was conducted to analyze the influence of parameters like thickness, consistency, and overburden on the behaviour of clay liners. The clay liner without any overburden is observed to experience severe cracking in the form of deep and wide cracks at the maximum curvature zone. The depth and width of the cracks are found to decrease with an increase in clay liner thickness. The cracking failure pattern is suppressed by shearing for a clay liner with an increase in overburden pressure. Based on model test results, the clay liner with an adequate overburden is found to be free from cracking failure even when subjected to sharp curvatures. The effective usage of a small geotechnical centrifuge to model the deformation behaviour of clay liners is demonstrated adequately.Key words: landfills, municipal solid waste, clay liners, centrifuge modeling, nonuniform settlements, model tests.

Sign in / Sign up

Export Citation Format

Share Document