An industrial-scale multiple water reuse system was under investigation for a period of four years at a modern poultry processing plant in Alexandria, Egypt. The system involved: chlorination of cooling water from the compressor; reuse of this water in the chiller; successive transfer of an equivalent amount of water from the chiller to the prechiller, from the prechiller to the wash tank, and finally, from the wash tank to the scalder. Process waters in the prechiller and wash tank were alternately purified by diatomaceous earth filtration. Long-term studies at the plant indicated successful utilization of a multiple reuse system with chlorinated water (20 mg/l input) and a water makeup rate of 20 m3/day.