摘要：We selected design alternatives for a wastewater treatment facility for “Kamaboko” processing plant and compared them. They were chosen from among various activated sludge processes, such as conventional activated sludge process, batch-type activated sludge processes, and the modified activated sludge process. We first calculated each construction cost from the kinetic coefficients in our previous report [K. TAKAMIZAWA et al.: Seikatsu Eisei, 30 , 15-18, (1986)], and then considered each economical cost on the basis of ordinary designing formula. Furthermore, we considered reliability and stability of each process. The authors came to the following conclusions. The modified activated sludge process, in which an aeration tank serves for both aeration tank and balancing tank is best from an economical standpoint. But, in consideration of stability of the effluent water quality, the batch-type activated sludge process in pararell appears best.
