冬季水芹浮床对富营养化水体的修复研究

发布时间：2018-03-06 05:16

本文选题：水芹浮床　切入点：基质　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：近年来,随着中国经济的发展,环境问题日趋突出,我国湖泊的富营养化问题也越来越受到关注。生态浮床是一种有效、经济和符合可持续发展要求的水处理技术,具有非常广阔的应用前景。本研究选取水芹为浮床植物构建多种组合生态浮床,在冬季低温条件下通过室内水培实验,对组合水芹浮床在不同基质、不同种植密度、不同填料条件下对富营养化水体的净化效果进行研究,对组合型生态浮床工艺运用到实践中具有一定指导意义和借鉴作用,为后续相关应用提供一定的理论依据。主要研究成果如下:(1)通过黄砂、陶粒基质水芹浮床的修复实验,研究水芹浮床中基质对富营养化水体的修复效果。研究发现:在冬季低温条件下,各水芹浮床系统对富营养化水体都有较好的修复效果;陶粒基质浮床对TN、TP的去除效果最佳,最高去除率分别为85.1%,85.0%;黄砂基质浮床对Chla、TOC去除效果最佳,最高去除率分别为75.1%,87.4%;基质对水芹浮床去除TP、Chla、TOC的促进作用较弱,对水芹浮床去除TN的促进作用较明显,表现为:陶粒黄砂无基质系统。(2)通过不同密度水芹浮床的修复实验,研究水芹浮床中种植密度对水体的修复效果的影响。研究发现:在冬季低温条件下,各水芹浮床系统对富营养化水体都有较好的修复效果;密度为6盆的水芹浮床对TN去除效果最佳,最高去除率为77.0%;密度为10盆的水芹浮床对TP去除效果最佳,最高去除率为92.6%;密度为2盆的水芹浮床对Chla、TOC去除效果最佳,最高去除率分别为66.7%,72.8%;种植密度与水芹浮床的TP去除率呈现正相关关系,与水体TOC的去除有一定的相关性。(3)通过竹片、沸石填料水芹浮床的修复实验,研究水芹浮床中悬挂填料对富营养化水体的修复效果。研究发现:在冬季低温条件下,各水芹浮床系统对富营养化水体都有较好的修复效果;沸石填料浮床对TN去除效果最佳,最高去除率为89.8%;竹片填料浮床对TP、TOC去除效果最佳,最高去除率分别为92.2%,59.1%;悬挂填料对水体去除TN、TP、TOC都有促进作用。对TN的去除表现为:沸石竹片无填料系统,对TOC的去除表现为:竹片沸石无填料系统;悬挂深度10cm的浮床系统对TN、TP的去除效果优于悬挂深度20cm的浮床系统,对TOC的去除效果弱于悬挂深度20cm的浮床系统。
[Abstract]:In recent years, with the development of China's economy, environmental problems are becoming more and more prominent, and the eutrophication of lakes in China has been paid more and more attention. Ecological floating bed is an effective, economic and sustainable water treatment technology. Water celery was selected as floating-bed plant to construct several kinds of combination ecological floating bed. The experiment was carried out in the laboratory under low temperature in winter. The floating-bed of water celery in different substrate and different planting density was studied. The study on the purification effect of eutrophication water body under different packing conditions has certain guiding significance and reference function to the application of combined ecological floating bed technology in practice. The main research results are as follows: (1) through the experiments of restoration of yellow sand, ceramic matrix water celery floating bed, The effect of substrate on eutrophication water was studied. It was found that each floatation bed system had better restoration effect on eutrophication water body under low temperature in winter, and TNT TP removal efficiency was the best in ceramic floatation bed. The highest removal rates were 85.1% and 85.0%, respectively; the yellow sand floatation bed had the best removal effect on Chlaan TOC, and the highest removal rate was 75.1% (87.4%). The substrate had a weak promoting effect on the removal of TOC by water celery floatation bed, and the promoting effect on TN removal from water celery floatation bed was more obvious. The effect of planting density on the restoration effect of water body was studied through the experiments of water celery floatation bed with different densities. The results showed that the effect of planting density on the restoration effect of water body was studied under low temperature in winter. The floatation bed system of water celery has better restoration effect on eutrophication water body, the floatation bed with density of 6 pots has the best removal effect of TN, the highest removal rate is 77.0, and the floatation bed with density of 10 basins has the best removal effect of TP. The highest removal rate was 92.60.The floatation bed with density of 2 basins had the best removal effect on TOC, the highest removal rate was 66.7% and 72.8% respectively. There was a positive correlation between the plant density and TP removal rate of water celery floatation bed, and there was a certain correlation with the removal of TOC in the water, and the highest removal rate was 66.70.There was a positive correlation between planting density and TP removal rate of water celery floating-bed, and there was a certain correlation with the removal of TOC in water. The effect of suspended fillers on eutrophication water was studied in the experiment of water celery floatation bed with zeolite fillers. The results showed that: under the low temperature in winter, the water celery floating bed system had better restoration effect on eutrophication water body; The removal efficiency of TN was the best with the highest removal rate of 89.8.The TOC removal efficiency of the floatation bed was the best, and the removal efficiency of TOC by the floating-bed was the best. The highest removal rates were 92.2% and 59.1%, respectively. The suspended fillers promoted the removal of TNTP-TOC in water. The removal of TN was as follows: zeolite bamboo without packing system, TOC with no packing system; The removal effect of TOC in floating bed system with suspension depth of 10 cm is better than that of floating bed system with suspension depth of 20 cm, but the removal effect of TOC is weaker than that of floating bed system with suspension depth of 20 cm.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X52

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