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A new sludge treatment process combining a high MLSS membrane bioreactor with sludge pretreatment techniques was studied in pilot-scale experiments. The membrane bioreactor (MBR) was adopted for high efficiency aerobic digestion. The combination of alkaline-ozone treatment of the mixed liquor in the MBR reactor accelerated the biodegradation process by(More)
  • HAMID R. DAVOODI, U. J. Lee, Ajay Chhibber
  • 1997
Prepared as a background paper for World Development Report 1997. We thank Ajay Chhibber and other members of the WDR team for discussions and suggestions. We received very helpful comments on earlier drafts from Abstract This paper uses a large cross country data set to look at the factors explaining the size of government and the consequences of(More)
A good understanding of the thermal hydraulic conditions resulting from steam-hydrogen releases in nuclear reactor containments is required for all aspects of accident management and for the design of mitigation measures. The GASFLOW II code has been developed at Forschungszentrum Karlsruhe (FZK) for analysis of such scenarios. It solves the three(More)
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