الفهرس 
chapter 1Only 14 pages are availabe for public view
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Abstract
Oxidation ponds used widely in treating the wast water and sewage industry as the costof its creation less than other treatment methods are availble if required land at a reasonable price.It features easy operation and its abikity to accommodate changes in organic and hydraulic surprise without affecting the quality of water emerging from them, which makes them suitable for developing countries and with low population census sources with less construction and operation and maintenance.