中文关键词
水资源管理供排水系统系统分析再生水优化模型污水处理 | 英文关键词water resources managementwater supply and drainage systemssystem analysisreclaimed wateroptimization modelswastewater treatment |
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| 中文摘要 |
| 开展协同利用清水与再生水的城市供水系统优化研究具有重要的科学意义和广阔的应用前景.为促进城市水资源高效利用，基于多水源转换关系以及再生水生产能力和利用潜力，构建了面向多区域多部门的城市清水与再生水协同利用优化模型，并以水资源严重短缺的北京市为例进行实证研究.设置规划方案基准情景和规划替代方案情景，分别优化了清水与再生水的协同利用方案以及再生水厂群的运行方案.在规划方案基准情景下，再生水占研究区用水总量的32%，分别占农业、工业、环境用水量的60%、30%和42%.海淀区和石景山区再生水供给矛盾将较为突出.相比之下，规划替代方案情景可以获得更高的经济效益，总效益增加6.21亿元，同时能增加再生水利用量36.59%、减少清水用量14.02%.规划替代方案能更加充分地利用现有设施，促进水资源循环利用.此外，还提供了在现有设施条件下，再生水利用量由政策规划值逐渐提升至最佳规模过程中再生水厂群的运行过渡方案.本文建立的研究方法具有较广泛的适用性，可用于解决其它具有再生水利用潜力地区的水资源短缺问题. |
| 英文摘要 |
| Coordinated utilization of clear and reclaimed water in urban water supply systems has attracted wide attention from both academic and industrial communities. Although the potential and impacts of water reuse have been explored in previous studies, there is still a lack of model-based research that can optimize the utilization of clear and reclaimed water among multiple sectors and at multiple locations and the associated operations of multiple water treatment plants. In this study, an optimization model was developed for supporting the coordinated supply of clear and reclaimed water in urban water supply systems. This model was formulated based on the conversion relationships among clear water, wastewaters, and reclaimed water resources as well as a number of constraints such as the water reclamation capacities of existing wastewater treatment plants. The developed model provides optimal plans for allocating clear and reclaimed water and for operating wastewater treatment plants in a complex water supply system. The optimization model was applied to a case study in the central districts of Beijing, China. Optimal results were generated under both business-as-usual (BAU) and alternative scenarios in which the utilization scale of reclaimed water was capped and not capped, respectively, according to the existing city plans. Under the BAU scenario, reclaimed water accounted for 32% of the total water used, and contributed 60%, 30%, and 42% of agricultural, industrial, and environmental water consumption, respectively. The supply-demand contradiction of reclaimed water was apparent in Haidian and Shijingshan districts. Compared to the BAU scenario, the alternative scenario achieved 0.621 billion yuan more in economic gain, consumed 36.59% more reclaimed water, and reduced clear water use by 14.02%. The alternative scenario also improved the use of the capacities of existing facilities and promoted water reuse. Moreover, the operation plans of wastewater treatment plants for increasing the utilization amount of reclaimed water was provided. The developed model could be widely applied to other water-scare cities with water reclamation potential without loss of generality. |
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https://www.hjkx.ac.cn/hjkx/ch/reader/create_pdf.aspx?file_no=20190731&flag=1&journal_id=hjkx&year_id=2019