改进层次分析—多级模糊评判的给水处理工艺优选模型

由于水源水质污染日益严重以及新水质标准对供水企业常规水处理工艺改造的必然要求,提出以常规处理工艺为基础,增加预处理、深度处理或对常规处理工艺进行强化,以满足出水水质的要求。针对目前饮用水处理工艺流程优选过程中存在的问题,运用模糊数学多层次综合评价理论,建立了给水处理工艺评价优选模型。同时采用加速遗传算法,对层次分析法判断矩阵进行一致性修正,解决了判断矩阵一致性修正的困难,并采用改进的层次分析法确定模型权重分配集合。以重庆市某水厂水处理工艺设计为工程实例,介绍该模型的计算流程以及评价方法,并运用模型对工艺流程进行评判,得出较优的给水处理工艺。

Improved Analysis Hierarchy and Fuzzy Evaluation Model for the Selection of Drinking Water Treatment Process

As the increasingly serious contamination of source water as well as the more stringent water quality standard,the pretreatment and advanced treatment were required for water supply enterprises.To find an appropriate treatment,the traditional approach is normally based on experts＇ knowledge and their experience which has several shortcomings.In order to find an effective and efficient way coping with the issue during selecting the optimal technologies for water treatments,an improved analysis hierarchy and fuzzy evaluation model was proposed.With the model,multi-stage fuzzy synthetic judgment was adopted with the Improved Analysis Hierarchy amended by Accelerating Genetic Algorithm.The application of this model had been introduced for the selection of supply water treatment technologies in a particular waterworks in Chongqing.