In this report, authors surveyed the amount and pattern of reclaimed water consumption, and analyzed the operating condition of treatment facility and the variation of water level in each tanks according to the improved water level of reclaimed water receiving tank. For the purpose of optimization of operating condition in water recycling system, the relationships between the water level control and effective capacity of tank are conducted from the results of analysis. And authors simulated the operating condition of treatment facility and the quantity of make-up water in the reclaimed water receiving tank by applying the concept for calculation of tank capacity, considering time lag of water-level control, and estimated influences, and suggested for optimal control method.
