关键词: 废水, 废水最小化, 再生, 优化

Abstract: Wastewater regeneration reuse is an effective way to reduce freshwater consumption of industrial water systems. The post-regeneration (Cr) is a critical factor to reduce freshwater consumption and operating cost. The quality of regenerated water improves continuously with the increase of the depth of treatment. However，the increase in the cost of wastewater treatment and decrease of the regeneration ratio (Ψ) will leads to the reduction of the quantity of regenerated water. In this paper，the post-regeneration (Cr) was related with the operating cost and regeneration ratio (Ψ). An optimal method of regeneration recycling water networks with double outlets regeneration unit was proposed with a case study，using an improved problem table method. Taking freshwater consumption and operating cost into account，the post-regeneration (Cr) was determined with the consideration of freshwater consumption and operating cost. Next，an optimal water network was constructed. Furthermore，a rain drainage regeneration recycling project of a petrochemical enterprise was analyzed via the proposed approach and the comparison between two available schemes was made.

Key words: wastewater, wastewater minimization, regeneration, optimization