Feasibility analysis of Physical chemical Treatment for domestic wastewater reuse in Iran

Waste water reuse bas been considered as a solution to the problem of water shortage in many arid and semi-arid climates. Iran has bun classified as semi-arid and her water resources might not meet the increasing demand regarding her prospectivediversified developments. Therefore, waste water reuse should be significant in alleviating water shortages in the future.
A physical chemical treatment comprising coagulation, adsorption, and sedimentation was utilized as a tertiary treatment of the effluent of Esfahan municipal waste water treatment plant in order to promote the quality of the effluent for various reuses. The coagulant was alum and the adsorption media was powdered activated carbon applied concurrently with the coagulant. An average removal of 92 and 78 percent was obtained for turbidity and COD respectively when alum was applied alone. When the activated carbon was applied with the coagulant, the removal
was increased to 98 and 88 percent for turbidity and COD respectively. A concentration of I. 2 J. T. U. and 2lmg/1 was obtained for turbidity and COD respectively making the effluent suitable for multiple reuse purpose.