本文的主要目的是从经济角度讨论并提出一种新的膜处理过程的计算或数值优化方法。优化针对典型的超滤系统，以时间依赖和稳态模式运行，并针对不同的原水条件（其特点是颗粒大小和浓度可变）。研究了这些变化对最优成本以及各种设计和操作变量的影响。包括6个参考文献、表格、图表。

The primary objective of this paper is to discussand present a new approach to computational or numerical optimization of membrane treatment processes from an economic standpoint. The optimizations are performed for typical ultrafiltration systems operating in time-dependent and steady state modes, and for different raw water conditions characterized by variable particle sizes and concentrations. The effects of these variations on the optimal costs and various design and operating variables are investigated. Includes 6 references, tables, figures.