植物-生物膜氧化沟中不同形态铁及根表铁膜与除磷的关系

发布时间：2018-01-10 09:40

本文关键词：植物-生物膜氧化沟中不同形态铁及根表铁膜与除磷的关系　出处：《农业工程学报》2016年05期 　论文类型：期刊论文

【摘要】：针对传统氧化沟投资建造成本高,脱氮除磷效率较差的问题,在污染现场建设植物-生物膜氧化沟,通过室内曝气模拟试验和室外小试试验,研究了总磷(total phosphorus,TP)的去除与铁和曝气时间的关系以及美人蕉、茭白根表铁氧化物胶膜对污水中磷的吸附去除情况,了解不同形态铁和植物根表铁膜与除磷的关系。研究结果表明:不同形态铁及植物根表铁膜与污水中磷的去除密切相关。随着曝气时间的延长,污水中铁减少量呈现出逐级递增的趋势,当曝气时间为12 h时,铁减少量达到0.45 mg/L以上,铁减少量与曝气时间之间的相关性达到极显著水平(P0.01),而TP的减少量与铁减少量之间也呈现极显著的相关性(P0.01)。小试试验中,3个系统出水磷含量及全Fe、Fe2+含量均有所降低,降低量表现出茭白系统美人蕉系统对照系统的规律;同时,美人蕉、茭白根表铁氧化物的沉积量随运行时间的延长而增加,且茭白根表铁膜数量及其吸附磷的数量均要高于美人蕉。该研究为植物-生物膜氧化沟工艺的改进及应用和推广提供了理论和实践依据。
[Abstract]:In order to solve the problem of high investment cost and poor efficiency of nitrogen and phosphorus removal in traditional oxidation ditch, botanical biofilm oxidation ditch was built in the pollution site, and indoor aeration simulation test and outdoor pilot test were carried out. The relationship between total phosphorus total phosphorus removal and iron and aeration time as well as the adsorption and removal of phosphorus from wastewater by iron oxide film of Canna indica and Zizania latifolia were studied. To understand the relationship between iron film and phosphorus removal in different forms of iron and plant root surface iron film. The results showed that different forms of iron and plant root surface iron film were closely related to phosphorus removal in wastewater, and with the extension of aeration time. The reduction of iron in sewage showed a gradual increasing trend. When the aeration time was 12 h, the reduction of iron reached more than 0.45 mg/L. The correlation between iron reduction and aeration time reached a very significant level, while the decrease of TP and iron reduction also showed a very significant correlation. The phosphorus content and the total Fe2 content in the effluent of the three systems were all decreased, which showed the regularity of the control system of the Canna system in the Zizania latifolia system. At the same time, the amount of iron oxide deposition in the roots of Canna indica and Zizania latifolia increased with the increase of running time. The amount of iron membrane and the amount of phosphorus adsorbed on the root of Zizania latifolia were higher than those of Canna. This study provided a theoretical and practical basis for the improvement, application and popularization of plant-biofilm oxidation ditch process.
【作者单位】：仲恺农业工程学院环境科学与工程学院;华南农业大学农业部华南热带农业环境重点实验室;
【基金】：国家自然科学基金(41401554) 广东省自然科学基金(2015A030313596) 农业部华南热带农业环境重点实验室开放课题广州市产学研协同创新民生科技重大专项(2014Y2-00526) 广东省教育厅-特色创新项目(自然科学)
【分类号】：X703;X173
【正文快照】： 刘雯,张建桃,周遗品,陈平,雷泽湘,刘晖,吴启堂.植物-生物膜氧化沟中不同形态铁及根表铁膜与除磷的关系[J].农业工程学报,2016,32(5):228-232.doi:10.11975/j.issn.1002-6819.2016.05.032 http://www.tcsae.orgLiu Wen,Zhang Jiantao,Zhou Yipin,Chen Ping,Lei Zexiang,Liu Hui

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