Abstract
This paper focuses on the characteristics of actual water consumption and operating conditions for each process of the wastewater reuse system in the local area. In order to obtain basic data for the water balance and optimization of the treatment facility in the stage of design and maintenance, we investigated and analyzed in advance on the following: hourly city water and reclaimed water consumpition and its balance; the behavior of water levels in the flow equalization tank and the reclaimed water receiving tank; the control of the flow rate for reclaimed water to be treated in order to achieve a balance of supply and demand for the water, etc. We surveyed the amount and pattern of water consumption and the ratio of water savings in the categories of purpose of use, use in individual buildings, as well as the entire region. The fluctuation of hourly water levels in the flow equalization tank and the reclaimed water receiving tank were estimated by the simulation of water balance-pollutant load calculation program. At the same time, the amount of the excess reclaimed water, the make-up water added to the reclaimed water and its time were predicted. In this study, we obtained the basic data for the design and established the method of prediction for the water balance and operation conditions.
