基于系统动力学模型的石家庄污水再生利用规划

Shijiazhuang city wastewater reclamation and reuse planning based on system dynamic's model

为给规划方案比选提供依据,在污水再生利用规划中应用了系统动力学模型。针对石家庄特点,设计多情景,并以非线性优化方法得到具体再生水水源和回用对象的配水方案。以优化方案作为模型输入,利用系统动力学模型进行情景模拟,得到各方案污染物排放量等方面的动态变化情况。综合评价结果表明:对环境容量满足程度较高的方案最优:预计到2020年,再生水利用量将达到2.4亿m3,可有效缓解了城市供水压力;从2010年到2020年,所需污水再生利用建设累计投资占各年GDP的0.052%,能够为经济发展水平所接受。

Dynamic simulation of various wastewater reuse development scenarios were used to compare reuse plans for Shijiazhuang＇s wastewater characteristics. The method non liner optimization to analyze the wastewater reuse sources and user water distribution with the optimal steady stable results as the input, a dynamic system model was used to analyze the effects of various flow changes on indexes such as pollutants discharges. Scenarios found to meet the environment limits better had the most comprehensive benefits. The water reuse will reach 240 million m^3 in 2020, to effeetively relieve the stresses on the urban water supply with the required accumulated investment equal to 0. 052% of GDP from 2010 to 2020, which is acceptable for economic development level.