Low-cost 'appropriate ' waste management technologies are being applied in a growing number of outer urban settlements, isolated communities and a variety of industrial situations in the developed and developing countries alike. Appropriate technologies are based on the same sound physical, chemical and biological principles as conventional technolgies, but these are adapted to suit local social, econonmic, cultural and other human factors. Small-scale systems are often the best option for small towns and villages, and there is clearly huge scope for such systems in developing countries. The 24 papers in this volume (selected from over 130 original submissions) cover the topics of on-site/land disposal, lagoons, wetlands, reuse, specific aerobic or anaerobic systems and industrial wastes, as well as the policy aspects of appropriate technologies in sanitation and wastewater management. Collectively they provide an authoritative worldwide survey of an expanding and ever more important area of water pollutlon control.
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