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Although Saudi Arabia is producing high gross national income per year in the Jeddah city, the sewage treatment and disposal systems does not meet the needs of people sufficiently. The disposal and industrial solid waste treatment and the collection of municipal sewage have been creating problems for a long time in Jeddah. The predictions showed that only 25% of raw sewage has been treated and cesspool system usage is still very common which increases underground water level. Moreover, the investigations depicted that the current location is unsuitable for the sewage and industrial dumping. In this sense, the processes of aerobic digestion carry out the organics through the presence of oxygen. It is well known that as a biological process, aerobic sludge digestion occurs in the existence of oxygen and in this process the bacteria in activated sludge consumes organic matter with oxygen and converts them …