关键词: 完全间歇过程, 用水网络, 多杂质, 优化

Abstract: The optimization of water-using network in a complete batch process system with multiple contaminants was studied in this paper. A superstructure of water-using network and the NLP（non-linear programming）mathematical model are constructed，and the quantity of flow in each water-using process is limited between the minimum and maximum in order to accelerate convergence. In this study，storage tanks are used to bridge the time gap. First，the key contaminant in each water-using process was ascertained，and then the superstructure was simplified by eliminating the reuse and recycle of the water resource with maximum concentration of the key contaminant. Second，the model is solved by GAMS（General Algebra Model System），and then the minimum fresh water and waste water discharge are gained as well as the number and volume of central storage tanks. Third，the optimized water-using network is obtained. Two examples in literature are solved to illustrate the validity and advantages of the proposed approach，which requires fewer cycle periods of calculation and smaller number of central storage tanks than before.

Key words: completed batch processe, water-using network, multiple contaminants, optimization