A pilot plant was developed for the reclamation and reuse of secondary effluent from a sewage treatment plant. The plant system
consists of sand filtration, gamma-irradiation, ozonation and ion-exchange. Gamma-irradiation showed effective organic contaminant
decomposition and this resulted in the reduction of 5-day biochemical oxygen demand (BOD5), color, chemical oxygen demand (CODCr) and total organic carbon (TOC). Ion-exchange significantly removed inorganic ions, and thus reduced total nitrogen (TN)
and total phosphorus (TP). The average reduction in color, CODCr, BOD5, TOC, TN and TP, which was obtained after 12 operations, was 64, 52, 67, 61, 95 and 92%, respectively. Irrespective of applied
radiation dose, the treated water fully satisfied the quality requirements of household water that can be used for all home
uses except for drinking and human contact uses.