[Organiser of Stirling's Red Buildings Conference for the Twentieth Century Society]

The aim of the conference is to review the three 'Red Buildings' with experts who have studied their history and their performance, and to discuss their future. Work is due to take place on the Leicester and Oxford buildings in the relatively near future, and technical knowledge can be shared in a context of understanding the design intention. Also to celebrate Stirling and Gowan's careers from a broader perspective and to assert the value of looking after these special buildings as assets for the future. The speakers in the afternoon session are people who knew the two architects well, and in some cases worked for them. [From University of Leicester]

Municipal services: organisations, companies and alternatives

A review of the impact of international institutions and multinational companies on municipal services worldwide, and of campaigns for alternatives.

Current status and perspectives of accelerated carbonation processes on municipal waste combustion residues

The increasing volumes of municipal solid waste produced worldwide are encouraging the development of processes to reduce the environmental impact of this waste stream. Combustion technology can facilitate volume reduction of up to 90%, with the inorganic contaminants being captured in furnace bottom ash, and fly ash/APC residues. The disposal or reuse of these residues is however governed by the potential release of constituent contaminants into the environment. Accelerated carbonation has been shown to have a potential for improving the chemical stability and leaching behaviour of both bottom ash and fly ash/APC residues. However, the efficacy of carbonation depends on whether the method of gas application is direct or indirect. Also important are the mineralogy, chemistry and physical properties of the fresh ash, the carbonation reaction conditions such as temperature, contact time, CO2 partial pressure and relative humidity. This paper reviews the main issues pertaining to the application of accelerated carbonation to municipal waste combustion residues to elucidate the potential benefits on the stabilization of such residues and for reducing CO2 emissions. In particular, the modification of ash properties that occur upon carbonation and the CO2 sequestration potential possible under different conditions are discussed. Although accelerated carbonation is a developing technology, it could be introduced in new incinerator facilities as a "finishing step" for both ash treatment and reduction of CO2 emissions.