人工浮床法生态治理城市河道富营养水体的研究

发布时间：2018-02-04 08:02

本文关键词： 植物浮床经济植物净化效果水质监测　出处：《扬州大学》2017年硕士论文　论文类型：学位论文

【摘要】：当今水体富营养化和黑臭现象是城市水环境面临的普遍问题。植物浮床技术作为有效的、经济的以及符合可持续发展理念的技术之一,目前已成为水环境综合治理领域的研究和应用热点之一。植物是植物浮床技术中净化污水的重要组成部分。植物在污染水体生长适应性是影响植物浮床净化效果的关键因素。因此,在提高植物浮床技术修复污水的效率方面,最重要的内容是选择合适的植物种类和创造植物合适的生长条件。本论文以浮床植物为研究对象,采用静态水培试验,研究了净化效果较好的用于富营养化水体净化应用的经济植物品种。采用室外现场试验,从植物在试验周期内的净增生物量以及植物组织内的氮、磷累积量,探讨了经济植物浮床应用中植物对污染物的去除量,以及经济植物浮床技术的可行性。通过对生菜和水芹进行室外污水水培和土壤栽培,分析比较了两种种植模式下生菜和水芹的产量和品质,为生菜和水芹的浮床技术的经济效益分析和食品安全性提供了有力依据。同时,本文监测了扬州市主城区10条城市河道全年水质污染变化情况。全年水质监测结果表明:扬州市主城区10条河道分别受到不同程度的污染,其中宝带河和红旗河综合水质污染指数较高。静态水培试验研究结果表明:生菜和水芹在富营养化水体上旺盛生长,对水中TN、TP、COD和NH4+-N的去除效果显著,可作为室外植物浮床试验的备选植物。其他植物在水培环境中生长良好,水质净化效果稳定。植物浮床室外现场试验结果表明:生菜和水芹适应室外污染水体水培环境,表现出良好的生长状况。经过49天的生长,植物的干物质净增量在91.8%-466.7%之间,吸收的氮、磷累积总量在0.2-43.77mg/g之间,其中地上部分的氮、磷量基本高于地下部分,这有利于通过收割植物去除氮、磷。在受生活污水污染的河道中种植生菜和水芹,不用施加任何肥料和杀虫剂,与土壤栽培相比,污水水培促进了植物产量提高,食用部分品质优良,符合国家卫生标准,而且达到了无公害蔬菜的质量标准。
[Abstract]:Nowadays, eutrophication and black-smelling phenomenon of water body is a common problem in urban water environment. Plant floating bed technology is one of the effective, economical and consistent with the concept of sustainable development. Plant is an important part of plant floating bed technology to purify sewage. Plant growth adaptability in polluted water body is affecting the purification effect of plant floating bed. The key factor. In order to improve the efficiency of plant floatation technology, the most important content is to select the appropriate plant species and create the appropriate plant growth conditions. In this paper, floating bed plants as the research object. In this paper, the economic plant varieties used in eutrophication water purification were studied by static hydroponics test. Based on the net increase of plant biomass and the accumulation of nitrogen and phosphorus in plant tissues during the test period, the removal of pollutants by plants in floating bed application of economic plants was discussed. And the feasibility of floating bed technology of economic plants. The yield and quality of lettuce and water celery were analyzed and compared under the two planting modes through outdoor sewage hydroponics and soil cultivation of lettuce and water celery. It provides an effective basis for economic benefit analysis and food safety of floating bed technology of lettuce and water celery. In this paper, the variation of water pollution in 10 urban rivers in Yangzhou City is monitored. The results show that the 10 rivers in Yangzhou City are polluted in different degrees. The results of static hydroponics experiment showed that lettuce and water celery grew vigorously on eutrophic water and TNP TP in water. The removal efficiency of COD and NH4-N is remarkable and can be used as an alternative plant for outdoor plant floating bed test. Other plants grow well in hydroponic environment. The results showed that lettuce and water celery could adapt to the outdoor polluted water culture environment, and showed good growth condition. After 49 days of growth, the plant floatation bed outdoor test results showed that the plant floatation bed had a good effect on water purification. The net increase of dry matter was between 91.8% and 466.7%, and the accumulated amount of nitrogen and phosphorus was between 0.2-43.77 mg / g. Phosphorus is generally higher than the underground, which facilitates the removal of nitrogen and phosphorus by harvesting plants. Lettuce and water celery are grown in watercourses contaminated by domestic sewage, without any fertilizer or insecticides, compared with soil cultivation. Wastewater hydroponics promoted plant yield, edible quality and met the national hygienic standard, and reached the quality standard of pollution-free vegetables.
【学位授予单位】：扬州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X52

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