摘要
水分质是一种按质供水、按质回用水的用水理念;废水资源化是指将生产废水和生活污水经科学分类处理后加以综合利用的一种循环利用方法。一个企业各环节对供水水质要求不同,各车间废水排放的水质也不尽相同,将供水和废水按水质分级,并在各级之间进行废水处理回用,以废水处理费用最小为目标函数,以废水排放量最小为约束条件,优化求解获得最优解。以某制药企业的典型工艺生产线为例,进行各车间的水资源循环梯级利用优化。优化结果与现有循环用水相比较,企业每年可节约新鲜取水量约24.49万t,按照当地工业用自来水价格2.5元t计算,年节约费用近61.23万元。
Water category by different quality is a philosophy of water supply and recycling by quality. Wastewater recycling is one method that treats and comprehensively utilizes the industrial wastewater and domestic sewage after scientific classification based on muhiple purposes. The water quality requirements of water supply in an enterprise vary at different processes and so does the water quality of wastewater from different workshops. The water and wastewater were classified into different levels according to their qualities and the wastewater was treated and reused among different levels. The optimal solutions were obtained with minimum wastewater treatment costs as objective function and minimum wastewater discharges as constraints. A production line of a typical process in a pharmaceutical factory was taken as an example to perform optimization of circular cascade reuse of water resources of various workshops. The results showed that the annual fresh water volume of 244 900 tons with a cost of 612 300 yuan was saved, compared to existing circulating water and calculated by local water price of 2.5 yuan per ton tap water for industrial use.
出处
《环境工程技术学报》
CAS
2012年第4期354-357,共4页
Journal of Environmental Engineering Technology
基金
国家水体污染控制与治理科技重大专项(2009ZX07208-002)
国家科技合作计划项目(2010DFB90590)
关键词
水分质
废水处理
废水资源化
梯级利用
water category by different quality
wastewater treatment
wastewater recycling
cascade utilization
