الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
During the composting process, there is a substantial loss of water during composting (reducing from 70% to 10% moisture content) but the density of the product will become less than that of the sludge because of its open texture (reducing from 1 to 0.7 m3/t). The amount of dry solids will also be reduced through the mineralization of organic matter (20% loss assumed). • The produced composted sludge has an average of 34 % Organic matter, 3% Total Nitrogen, 175 mg/kg available phosphorus.• 1 m3 of dewatered sludge is converted into 0.4 m3 of matured compost. • The total capacity of sludge treatment at site 9N is about 150,000 tons, which is equal to sludge produced from Alexandria treatment plants during 75 days. The sludge treatment process takes three months (two months fermentation period and one month curing period) which indicates that the composting area at site 9N is not enough to receive the sludge, therefore it is important to find another new composting site with an area of about 200 feddans. The site suggested is the extension of site 9N to the west direction which has a large unused desert area. • The sludge produced from Borg El-Arab treatment plants about 200 tons/day- will need to be treated in site, and we need to establish two sites for sludge treatment in Borg El-Arab city. The area of each sludge treatment site should be about 70 feddans.