The Prospects for Improved Energy Efficiency in the UK Residential Sector

The perceived threat of climate change has become an important global issue of the 1990s, with measures to limit its ramifications now commonly linked to mainstream policy agendas. Reducing carbon intensity can be achieved through both supply and end-use energy strategies, though improvements in end-use efficiency are said to offer the best opportunities both in terms of effective investment and producing results in the short to medium term. UK policy makers have stressed that energy use in the home is a pressing area to be addressed. This paper reviews the myriad of efficiency options available, assessing the effectiveness of national and supra-national strategies in encouraging technical efficiency and stimulating beneficial behaviourial changes. Findings indicate that the range of (and commitment to) current efficiency measures, reinforced by a lack of policy coherence, ensures that future prospects remain ambiguous. Initiatives, though conceived at a variety of spatial scales, tend to be implemented at a localized level and it is the actions (and interactions) of local actors that may well determine the shape and success of sustainability measures.     

Comparison of coal/solid recovered fuel (SRF) with coal/refuse derived fuel (RDF) in a fluidized bed reactor

An experimental study was undertaken to compare the differences between municipal solid waste (MSW) derived solid recovered fuel (SRF) (complying with CEN standards) and refuse derived fuel (RDF). Both fuels were co-combusted with coal in a 50 kW fluidised bed combustor and the metal emissions were compared. Synthetic SRF was prepared in the laboratory by grinding major constituents of MSW such as paper, plastic, textile and wood. RDF was obtained from a local mechanical treatment plant. Heavy metal emissions in flue gas and ash samples from the (coal + 10% SRF) fuel mixture were found to be within the acceptable range and were generally lower than that obtained for coal + 10% RDF fuel mixture. The relative distribution of heavy metals in ash components and the flue gas stream shows the presence of a large fraction (up to 98%) of most of the metals in the ash (except Hg and As). Thermo-gravimetric (TG) analysis of SRF constituents was performed to understand the behaviour of fuel mixtures in the absence and presence of air. The results obtained from the experimental study will enhance the confidence of fuel users towards using MSW-derived SRF as an alternative fuel.     

Moving Towards Sustainable Development? Integrating Economic Development and the Environment in Local Authorities

The recent growth of interest in sustainable development has led to the incorporation of the concept into policy making at a variety of scales. In all cases particular emphasis is placed upon the local scale as the focus for the implementation of policy and initiatives and especially upon local authorities as the major contributor to this process. There has been little assessment, however, of the extent to which local authorities either can, or are, undertaking such initiatives. This paper examines: the potential role that local authorities can play in integrating economic development and the environment; the forms of response and initiatives that are currently in place, drawing upon survey evidence from urban local authorities in England and Wales; and some of the limits to local authority action.     

Determination of renewable energy yield from mixed waste material from the use of novel image analysis methods

Two novel techniques are presented in this study which together aim to provide a system able to determine the renewable energy potential of mixed waste materials. An image analysis tool was applied to two waste samples prepared using known quantities of source-segregated recyclable materials. The technique was used to determine the composition of the wastes, where through the use of waste component properties the biogenic content of the samples was calculated. The percentage renewable energy determined by image analysis for each sample was accurate to within 5% of the actual values calculated. Microwave-based multiple-point imaging (AutoHarvest) was used to demonstrate the ability of such a technique to determine the moisture content of mixed samples. This proof-of-concept experiment was shown to produce moisture measurement accurate to within 10%. Overall, the image analysis tool was able to determine the renewable energy potential of the mixed samples, and the AutoHarvest should enable the net calorific value calculations through the provision of moisture content measurements. The proposed system is suitable for combustion facilities, and enables the operator to understand the renewable energy potential of the waste prior to combustion.     

Joint Working within Local Government: air quality as a case-study

Air quality management (AQM) is a process of environmental control that must be embedded within a wide range of policy areas, from local-scale initiatives to international treaties, if it is to be successful. Because of the integrative aspects of AQM, it is imperative that joint working is undertaken within local authorities and other involved parties. Environmental health departments have taken the lead role in AQM as they have traditionally had responsibilities for some other aspects of pollution control. However, AQM requires input from a variety of professionals such as transport planners, land-use planners, economic development officers and Local Agenda 21 (LA21) officers, as well as environmental health professionals. This paper examines the involvement of these professions within the AQM process. Results are presented from a widespread questionnaire survey of urban local authorities in England. In the case of air quality, it is concluded that co-operation between the necessary professions is still at an early stage. Transport planners are more fully engaged with the process than are land-use planners or economic development officers. In order that the joint working process develops appropriately, it is suggested that LA21 officers have an important role in facilitating inter-professional working to support the AQM process.     

UK electricity requirements and the environmental and economic aspects of the development of the combined cycle power station

In the space of three to four years, gas has changed from being a premium fuel, not to be utilized in power stations, to virtually the only fuel being considered for future electricity generation in the UK. This paper reviews the growth in the use of gas for electricity generation within the UK, with particular regard to the adoption of the gas-fired combined cycle power station. The environmental, economic and strategic issues associated with the proposed development of approximately 27 GW of new gas-fired plant are analysed and the resulting effects on existing base load power plant within the UK are considered.Dr James W.S. Longhurst is Director of the Atmospheric Research and Information Centre, ARIC, at Manchester Metropolitan University He is an environmental scientist who has specialized in the air quality impacts of transport and energy. He holds a BSc, MSc and PhD in Environmental Science from, Plymouth Polytechnic, Aston University and Birmingham University, respectively. He has written numerous papers, consultancy reports, books and technical reports since 1986.Jane Bantock joined ARIC in 1992 with a degree in Environmental Studies from Manchester Polytechnic. She jointly manages ARIC's information and education programmes. Her research interests include the inter-relationship of UK energy policy and emission control in the electricity generating sector, the subject of her part time PhD, and urban air quality issues.     

Assessment of municipal waste compost as a daily cover material for odour control at landfill sites

The ability of municipal waste compost as a daily cover material to reduce the odorous emissions associated with landfill surfaces was investigated. Trials were carried out using landfill gas, a certified sulphurous gas mix and ambient air as a control. Odorous gas was passed through portable test column filled with compost at different densities (590 kg/m3 and 740 kg/m3). Gas samples were taken from the inlet, outlet and at varying column depths and examined using a combination of sensory analysis (olfactometry) and a novel analytical method (Transportable Selected Ion Flow Tube--TSIFT). Results for the trials using landfill gas showed a 69% odour reduction (OU/m3) through the column for compost with a bulk density of 590 kg/m3, and a reduction of 97% using compost with a bulk density of 740 kg/m3. TSIFT analysis showed an overall decrease in the concentration of terpenes, and sulphurous compounds in the outlet gas from the column for both bulk densities. No significant trend could be identified for the concentrations at different depths within the column. Results show the ability of compost to reduce landfill odours under differing conditions. The inconclusive data provided by TSIFT analysis may be due to the analysis of compounds that are not contributing to odour, and thus highlights the potential for synergetic effects and the importance of sensory measurement when examining odorous emissions.     

Morphological classification of bioaerosols from composting using scanning electron microscopy

This research classifies the physical morphology (form and structure) of bioaerosols emitted from open windrow composting. Aggregation state, shape and size of the particles captured are reported alongside the implications for bioaerosol dispersal after release. Bioaerosol sampling took place at a composting facility using personal air filter samplers. Samples were analysed using scanning electron microscopy. Particles were released mainly as small (<1 μm) single, spherical cells, followed by larger (>1 μm) single cells, with aggregates occurring in smaller proportions. Most aggregates consisted of clusters of 2–3 particles as opposed to chains, and were <10 μm in size. No cells were attached to soil debris or wood particles. These small single cells or small aggregates are more likely to disperse further downwind from source, and cell viability may be reduced due to increased exposure to environmental factors.     

销售的可持续性

我们所看到的许多资料的研究显示,消费者通常对可持续思想是支持的和要求保证制造商是负责任的.