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"Introducing private sector participation (PSP) into the water and sewerage sectors in developing countries is difficult and controversial. Empirical studies on its effects are scant and generally inconclusive. Case studies tend to find improvements in the sector following privatization, but they suffer from selection bias and it is difficult to generalize their results. To explore empirically the effects of PSP on coverage, Clarke, Kosec, and Wallsten assemble a new dataset of connections to water and sewerage services at the city and province level based on household surveys in Argentina, Bolivia, and Brazil. The household surveys, conducted over a number of years, allow them to compile data before and after the introduction of PSP, as well as from similar (control) regions that never privatized at all. Their analysis reveals that, in general, connection rates to piped water and sewerage improved following the introduction of PSP, consistent with the case study literature. The authors also find, however, that connection rates similarly improved in the control regions, suggesting that PSP may not have been responsible for those improvements. On the other hand, connection rates for the poorest households also tended to increase in the regions with PSP and in the control regions, suggesting that--in terms of connections at least--PSP did not harm the poor. This paper--a product of the Growth and Investment Team, Development Research Group--is part of a larger effort in the group to study the impact of infrastructure reform on poor households"--World Bank web site.

Sewerage --- Water-supply

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Sewers: Replacement and New Construction is a detailed guide to the management and construction of new sewer systems. Different construction and replacement techniques, such as jacking, moling and ramming, are described and evaluated.The importance of proper site preparation and management is emphasised, and detailed guidance is given to pre-construction investigation as well as to managing traffic and public relations during the construction period.Geoffrey Read, one of the UK's leading experts on sewer construction, has compiled the most detailed account available on this sub

Sewerage --- Sanitary engineering. --- Design and construction. --- Engineering, Sanitary --- Environmental health engineering --- Engineering --- Public health --- Buildings --- Sanitation --- Environmental engineering --- Environmental Sciences --- Sustainable Development

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Samenvatting:The suitability of Advanced Oxidation Processes (AOPs) for pollutantdegradation was recognised in the early 1970s and much research anddevelopment work has been undertaken to commercialise some of theseprocesses.AOPs have shown great potential in treating pollutants at both low andhigh concentrations and have found applications as diverse as groundwater treatment, municipal wastewater sludge destruction and VOCscontrol.Advanced Oxidation Processes for Water and Wastewater Treatment is anoverview of the advanced oxidation processes currently used or proposedfor the remediation of water, wastewater, odours and sludge.The book contains two opening chapters which present introductions toadvanced oxidation processes and a background to UV photolysis, sevenchapters focusing on individual advanced oxidation processes and,finally, three chapters concentrating on selected applications ofadvanced oxidation processes.Advanced Oxidation Processes for Water and Wastewater Treatment will beinvaluable to readers interested in water and wastewater treatmentprocesses, including professionals and suppliers, as well as students andacademics studying in this area.Dr Simon Parsons is a Senior Lecturer in Water Sciences at CranfieldUniversity with ten years' experience of industrial and academic researchand development.

Water --- Sewage --- 628.3 --- afvalwaterzuivering --- uv-oxidatie --- waterbehandeling --- AOP (advanced oxidation processes) --- fenton proces --- ultrageluid --- Oxidation --- Sewage disposal --- Aeration of water --- Aeration. --- Purification --- Oxidation. --- waterzuivering --- Aeration --- Afvalwater --- Waterzuivering; oxidatie --- Afvalwaterzuivering --- Afvalwaterzuivering. --- Domestic effluent --- Domestic sewage --- Domestic wastewater --- Effluent (Sewage) --- Industrial effluent --- Industrial wastewater --- Sewage effluent --- Waste water --- Waste waters --- Wastewater --- Wastewaters --- Sewerage --- Hydrology --- Purification&delete&