天津滨海高新区再生水景观河道水质污染现状与治理对策研究

发布时间：2018-04-21 12:25

本文选题：再生水 + 景观河道　；参考：《河北工业大学》2015年硕士论文

【摘要】：天津是重度缺水城市,人均水资源占有量居全国倒数第一,随着城市现代化建设不断加快,景观用水量不断增加,寻找充沛、可用的景观水源成为了城市建设者面临的重要问题。城市污水每天大量排放,水量稳定,将城市污水深度处理,回用于景观水体,已成为解决城市景观水体缺乏的主要途径。但是与自然景观河道相比,再生水景观河道存在着再生水本底浓度高、水体自净能力差等问题,较天然景观河道更易发生水华现象。为了解再生水景观河道的富营养化规律,发现再生水景观河道存在的问题,选取了天津滨海高新区景观河道作为研究对象,通过对2014年4~9月主要水质指标的连续性监测,分析再生水景观河道实际运行情况,提出了适合天津高新区景观河道的水质应急处理措施和水质维护方案。研究发现,滨海高新区景观河道水质在2014年4~9月期间氮、磷和COD等主要水质指标超标严重,属于劣Ⅴ类水质,呈严重富营养化状态,但对比天然景观河道,再生水景观河道由于总磷含量较低,并未发生大规模水华现象。通过小试实验确定了加载混凝法处理再生水景观河道的最佳投药量、最佳投药顺序、最佳静沉时间,提出了采用加载混凝技术作为高新区景观河道的应急处理措施。通过分析景观河道富营养化的主要影响因素,提出了外/内源性污染物质的防控、曝气推流、高效过滤、复合生物群修复等适合高新区景观河道的水质维护方案。通过本研究可以了解再生水景观河道的富营养状况,找出适合天津滨海高新区景观河道的水质改善措施,为今后其它景观河道采用再生水补水时提供依据。
[Abstract]:Tianjin is a city with severe water shortage, and its per capita water resources share is the lowest in the country. With the acceleration of urban modernization, the water consumption of the landscape is constantly increasing, and the search for abundant water resources is abundant. Available landscape water has become an important problem for urban builders. A large amount of urban sewage is discharged every day and the quantity of water is stable. The advanced treatment of urban sewage and its reuse in the landscape water body have become the main way to solve the shortage of urban landscape water body. However, compared with the natural landscape river, the reclaimed water landscape channel has many problems such as high background water concentration and poor self-purification capacity, which is more likely to occur Shui Hua phenomenon than the natural landscape river channel. In order to understand the eutrophication rule of the reclaimed water landscape channel and find out the problems existing in the reclaimed water landscape channel, the landscape river course of Tianjin Binhai High-tech Zone was selected as the research object, and the continuous monitoring of the main water quality indexes from April to September 2014 was carried out. Based on the analysis of the actual operation of the reclaimed water landscape channel, the water quality emergency treatment measures and the water quality maintenance scheme for the landscape river course of Tianjin High-Tech Zone are put forward. It was found that the water quality of landscape watercourses in Binhai High-Tech Zone was serious in the period of April to September of 2014, such as nitrogen, phosphorus and COD, which were seriously exceeded the standard, and belonged to class V water quality, showing a serious eutrophication state, but compared with natural landscape watercourses. Owing to the low total phosphorus content, Shui Hua phenomenon did not occur in the reclaimed water landscape river. The optimum dosage, the best dosing sequence and the optimal settling time of the reclaimed water landscape channel were determined by the small scale experiment. The emergency treatment measures of the landscape river course in the high-tech zone were put forward by using the loading coagulation technology. Based on the analysis of the main factors affecting eutrophication of landscape river, the water quality maintenance schemes of external / endogenous pollutants, aeration pushing flow, high efficiency filtration and complex biota restoration are put forward. Through this study, we can find out the eutrophication status of the reclaimed water landscape channel, find out the water quality improvement measures suitable for Tianjin Binhai High-tech Zone landscape river channel, and provide the basis for other landscape river channels to use reclaimed water to replenish water in the future.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X52

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