再生水回用于城市景观水体的基础研究

发布时间：2018-01-25 08:06

本文关键词： 再生水景观用水富营养化藻类植物净化　出处：《西安建筑科技大学》2013年硕士论文　论文类型：学位论文

【摘要】：水资源短缺已成为全球性的问题，再生水作为缺水城市景观水体的补充水源将成为一种必然趋势，但是再生水作为城市景观水体的补充水源尚存在诸多问题。本论文分别在实验室和现场条件下研究了再生水在自然条件下随着时间的增加，水体水质的自然退化、藻类种类、数量的变化以及植物对水质的净化作用，旨在为再生水回用于景观水体的实际应用提供重要参考。本论文的主要研究结果如下：（1）在夏季较高温条件下，，再生水水质迅速退化，由于水温较高，水体出现营养盐的累积、藻类数量上升,一周内发生富营养化，藻类数量达到200mg/m3以上。（2）水葫芦能有效地去除水体中的氨氮和溶解性磷，水葫芦对氨氮的去除率是92.6%，吸收率是2.491mg/g,对溶解性磷的去除率是52.16%，吸收率是0.0653mg/g。可有效控制藻类水华和水体富营养化，明显提高水体水质。（3）睡莲对氨氮的去除率是66.6%，对总磷的去除率是46.4%，对总氮的去除率是74.4%，对COD值的去除率是36.25%。睡莲能有效的去除水体中的氮磷等营养物质、阻止藻类的生长和水体富营养化。（4）以再生水作为景观水体的补充水源时，应主要针对隐杆藻，二形栅藻，直链藻，披针新月藻进行水华预防。磷浓度对藻类的增长有极大的促进作用，藻类的生长率和生长量与总磷浓度密切相关，因此控制磷酸盐含量是控制藻类生长的关键因素。在景观水体中补充再生水的比例最好是40%。（5）以再生水作为人工湖唯一水源，将再生水直接作为人工湖的补给水时，湖水的氮、磷等指标始终保持较高的浓度，氨氮浓度变化范围为0.132~2.547mg/L，溶解性磷浓度变化范围为0.02~0.204mg/L。氮磷等营养物质及有机物浓度均偏高，如果长期运行，发生富营养化的可能性较高。
[Abstract]:The shortage of water resources has become a global problem, and reclaimed water will become an inevitable trend as a supplementary source of water for urban landscape water. However, there are still many problems in reclaimed water as a supplementary source of urban landscape water. In this paper, we studied the increase of reclaimed water in natural conditions with time in laboratory and field conditions. The natural degradation of water quality, the variety of algae species and quantity, and the purification of water quality by plants. The purpose of this paper is to provide an important reference for the practical application of reclaimed water in landscape water bodies. The main results of this paper are as follows: 1) under the higher temperature in summer, the water quality of reclaimed water degraded rapidly. Because of the high water temperature, the accumulation of nutrients appeared, the amount of algae increased, and eutrophication occurred within a week. The algae population is over 200 mg / m ~ 3. 2) Water hyacinth can effectively remove ammonia nitrogen and dissolved phosphorus from water body. The removal rate of ammonia nitrogen and absorption rate of water hyacinth are 92.6 mg / g and 2.491mg / g respectively. The removal rate of dissolved phosphorus is 52.16 and the absorptivity is 0.0653 mg / g. It can effectively control algae Shui Hua and eutrophication and improve water quality. The removal rate of ammonia nitrogen, total phosphorus and total nitrogen were 66.6, 46.4 and 74.4% respectively. The removal rate of COD value is 36.25%. Water lily can effectively remove nitrogen from water. Phosphorus and other nutrients prevent algae growth and water eutrophication. 4) when reclaimed water is used as the supplementary water source of landscape water body, it should be mainly aimed at Cryptophaga, Diploidophyta, Verticillium spp., and Phaeocephala spp., which can be prevented by Shui Hua. Phosphorus concentration can greatly promote the growth of algae. The algal growth rate and growth amount are closely related to the total phosphorus concentration, so controlling the phosphate content is the key factor to control the algal growth, and the best proportion of reclaimed water in the landscape water is 40%. 5) when the reclaimed water is used as the only source of water for artificial lake and the reclaimed water is used directly as the recharge water of artificial lake, the nitrogen and phosphorus of lake water always keep high concentration. The range of ammonia-nitrogen concentration was 0.132n 2.547mg / L, and the range of dissolved phosphorus concentration was 0.02n 0.204mg / L, the concentration of nitrogen and phosphorus was higher than that of organic matter. If run for a long time, the possibility of eutrophication is higher.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：X703;TU984

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