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The study aimed to use geographic information system (GIS) based multi-criteria decision making analysis (GIS-MCDA) to select areas suitable for siting landfills in Ashanti region. It also sought to ascertain variables most sensitive to the siting of landfill in the region.

This study utilized GIS-based Multi-criteria decision making analysis –AHP to model and select areas most suitable to siting landfills within the region. Overall, 16 variables including wind speed and hydraulic conductivity (which were previously neglected in landfill siting in Ghana) were identified through comprehensive literature review. These variables were weighted using AHP method and integrated using the weighted linear combination (WLC) in GIS environment to develop five sub-models: the physical environmental, sociocultural, economic/technical, climatic and hydrogeological sub-models. These sub-models were further weighted and then integrated to derive the final suitability model.

Results show that 13% (3,067 km²) of the region was identified as most suitable to siting engineered landfills. The study also identified 11 sites which are considered most suitable for situating landfills. On a sensitivity angle, hydrogeological (R² = 0.5923; p = 0.003) and physical environmental sub-model (R² = 0.254; p = 0.034) significantly predicted the final suitability model developed.

Ghana's Landfill Guidelines seeks to optimize site selection and ancillary services that culminate into achieving sanitary landfills by 2020. Evidence still abounds on the unsuitability of existing and in some cases, new landfill sites presenting environmental and social negative impacts. The comprehensive evaluation of most crucial variables – social and environmental factors that determine an optimal landfill location – will be of immense help to policy planners like the Environmental Protection Agency (EPA) towards upgraded landfills. The authors hope that, concerned agencies will adopt the model in the study and integrate into their existing landfill suitability modeling techniques to provide a more grounded framework that optimizes landfill site selection within the study area.

This study is the first attempt to consider a regional-level waste collection site selection in Ghana using comprehensive sets of social and environmental factors and will therefore contribute immensely to EPA's goal of achieving upgraded landfills by 2022.

The most common form of municipal waste disposal in the EU continues to be landfilling, from which leachate could seriously contaminate ground water aquifers that serve as drinking water sources. Constructed wetland is considered as a sustainable option as it facilitates water recycling in landfill sites using closed loop technology. In Slovenia constructed wetlands have been successfully developed and there are already 6 landfills that have been remediated using this technique. An innovative co‐natural approach that has been applied on the landfill site at Ormoz (1.5ha), allows a landfill site to become a bioreactor by permitting controlled infiltration. Leachate is purified using a constructed wetland covering 1,000m². The average hydraulic load is 12m³/d. Purified water will then be recycled through an underground irrigation system to fast growing trees. We assume that this solution will allow rapid stabilisation of the landfill site as the infiltrated water in the landfill site stimulates microbes to mineralise organic waste. There is no risk of leaks as the root systems of trees follow the non‐uniform settling of waste. Owing to the closed hydrological and pollution cycle, the impact on the environment and especially the risk of water contamination will be reduced.

A GIS based environmental decision support system for municipal solid waste management under Indian socio‐economic and regulatory conditions, named as EDSS‐MSWI has been developed. This paper intends to report the methodology and application of the EDSS‐MSWI for municipal landfill site selection taking a case study of Varanasi city (India).

EDSS‐MSWI has been developed using VB.NET and ArcGIS Engine programming tools. A set of 13 criteria are selected for primary landfill site selection. Analytical hierarchy process (AHP) has been used to give weights to different criteria. The criteria were aggregated and suitability index (S) is generated using weighted linear combination (WLC) technique in GIS environment. The suitability index (0‐10) values are classified into four categories (Excluded, Less Preferable, Suitable and Best Suitable) to select the landfill site.

The results indicate that there are at least four locations under the “best suitable” category where adequate land seems available for landfilling in Varanasi. It is found that GIS based multi‐criteria decision analysis (MCDA) can be a powerful tool for such applications.

The weights of different criteria have been based on the opinion of three experts only. This may involve subjectivity to that extent. Aggregation of more experts’ views may further refine the values of weights.

The developed tool provides a helpful guide to solid waste management planners.

The development of EDSS‐MSWI is the first of its kind in India to consider all aspects of municipal solid waste management in a holistic way and present it in an independent software form.

This paper reviews the potential uses of sanitary landfill biogas, and the possibility of harnessing biogas from the Bellville South Municipal Landfill (within the City of Cape Town, South Africa), as primary energy. This paper will focus on a specific landfill site as a case study. The theoretical research involves investigating aspects on the gas extraction and application possibilities for the site. Thereafter, two industrial gas usage scenarios located within the study area are examined in order to quantify the potential energy production and carbon emissions benefits. The gross energy production from the landfill’s biogas is estimated to be 520 × 10⁶ MJ annually, whilst 262 × 10⁶ and 527 ×10⁹ litres of carbon savings for two different industrial applications are theoretically achievable. On the basis of this analysis, conclusions are drawn regarding the potential for harnessing of the gas in relation to the case study and elsewhere.

The purpose of this paper is to interrogate the fate of landfills as waste disposal option in Accra. This becomes imperative since for a long time, efficient disposal of waste remains a neglected issue and potential source environmental hazard.

The study adopted content analysis of literature, in-depth interview schedules with key stakeholders and direct field observations.

Landfills in Accra are in a state of ambivalence due to mismanagement. Improper designing and siting of dumpsites, often in close proximity to water sources and human settlements have created aesthetic and odour nuisances and increase health risks, attracting the wrath, disaffection and distrust of residents.

The study provides an insight into broader issues of landfills and demonstrates Accra's vulnerability to health hazard due to improper waste disposal, which becomes apparent with the least downpour and the subsequent flooding which exposes most drains as de facto receptacles for waste.

From all indications, Accra appears to be on the brink of a landfill void. Though this issue has been an open secret since 2000, it remains unattended to till date and calls for an immediate, well-planned and concerted attention.

This paper adopts qualitative research techniques to delve into a subject matter whose implication has citywide consequences. The method allows for in-depth assessment of the intent and commitment of all key stakeholders, which brings to the fore that landfills will no longer be the cheapest or simplest waste disposal option.

It is unlikely that, as yet, a paper on this subject is of wide general interest. However, it would seem that the assessment of landfill sites will become a more common valuation exercise, particularly for those involved with the mineral extraction industry. Responsible landfill waste disposal was primarily in the control of local authorities, but there has been an emergence of privately operated waste disposal companies over recent years and an awareness of the commercial potential of such operations has developed. Therefore, a need to appreciate values in the context of all aspects of practice, whether for sale, purchase, asset valuation or tax computation, is becoming more relevant to the general practitioner.

Local landfills in communities across the US are the battlegrounds in the conflict between our desire to consume goods at an extraordinary rate and our inability to deal with waste that is a by-product of this consumption. Despite efforts to reduce the amount of wastes generated through source reduction, in 2003, US residences, businesses, and institutions produced more than 236 million tons of municipal solid waste (trash and garbage), approximately 4.5 pounds of waste per person per day (EPA, 2003a). Also in 2003, 16,694 generators of regulated hazardous waste accounted for more than 30 million tons of hazardous wastes, more than half a pound of hazardous wastes per person per day (EPA, 2003b).

Waste disposal is big business. Some 20 million tonnes of household and commercial waste is disposed of each year in the United Kingdom. A similar quantity of industrial waste — some of it hazardous — requires treatment and disposal. Household, commercial and industrial wastes as defined in the Control of Pollution Act 1974 are known as controlled wastes. In addition there are vast quantities of mining and quarry wastes. Approximately 90 per cent of all these materials is landfilled in its crude state. Much of the remainder is landfilled after treatment. Clearly, then, the proper selection, preparation, operation and aftercare of landfill sites is of paramount importance. Landfill is popular because it is significantly less costly than other methods of disposal — indeed it is the only option for a wide range of wastes. It must not, however, be regarded or perceived as a cheap and nasty option. Many professional disciplines and skills are involved in the sequence from site selection through to aftercare. Among these are geology, hydrogeology, property purchase, civil, mechanical and gas engineering, chemistry and agriculture. If landfill is to retain and deserve its pre‐eminent position, every step must be taken to the highest professional standards.

As construction and demolition(C&D) waste is one of the main solid waste generators in Hong Kong, its impact on the environment has become an imperative issue to the involved stakeholders. Although, C&D waste management has been receiving increasing attention from stakeholders and researchers since the early 1980s, how to manage C&D waste efficiently and effectively is, however, still in its early stages. Past research on C&D waste management has mainly focused on the separate aspects of waste management including waste reduction, reuse, recycle and response. A new approach is made in this paper to improve C&D waste management.

A simulation model is developed based on system dynamics methodology for strategic planning of C&D waste in Hong Kong by incorporating the relationship of major activities inherently involved in C&D waste management.

Finds that such an integrated simulation model will have the potential to assist decision makers and practitioners to better understand the complexity of information and processes involved in managing C&D waste throughout a project's life‐cycle.

This has shown that management of C&D waste can be facilitated by means of system dynamics to provide a better understanding of the dynamic interactions and interdependencies of the key areas of the C&D waste management process.

This chapter explores the state's response to the waste crisis (see also McDonagh, Varley, & Shortall, 2009). The conceptual basis for key turning points in the state's waste management policy is located within the parameters of an EM approach. An outline of eco-modern and sustainable thinking is provided in the chapter, as the state's policy shift on waste, from a reliance on landfill to a strategy informed by the EU's waste hierarchy would provide many of the political opportunities for GSE, and their political allies, to exploit.