潜流式人工湿地消纳城市污水厂尾水微生物特性及机制

发布时间：2018-05-12 20:02

本文选题：尾水 + 磷脂脂肪酸　；参考：《土木建筑与环境工程》2016年06期

【摘要】：为揭示潜流式人工湿地消纳城市污水厂尾水微生物特性及机制,以位于常州市城北污水处理厂内的潜流式人工湿地消纳城市污水厂尾水旁路试验系统中的植物根系、湿地填料及湿地土壤中微生物为研究对象,通过镜检、脲酶、磷脂脂肪酸(PLFA)等分析手段对其进行相关研究。结果表明,植物根系、填料中含有团藻等菌胶团和轮虫、变形虫等原生动物,团藻等菌胶团通过自身新陈代谢及光合作用,利用尾水中N、P进行生物代谢,去除低碳源条件下尾水中的N、P等。湿地脲酶平均含量(N)约为22.43mg/g,其活性与TN的去除呈线性相关,活性越高,TN去除率越高。消纳城市污水厂尾水湿地填料中饱和脂肪酸(PLFA)含量为99.30%,不饱和脂肪酸含量仅为0.70%,这与潜流式人工湿地处理城市污水中的PLFA含量有很大差别(分别为76.97%、23.03%)。以脂肪酸生物标记量为指标,显示湿地填料中形成了以好养细菌为优势种群的微生物生态结构。团藻、好氧微生物是低碳源尾水中TN等污染物去除的主要载体微生物。
[Abstract]:In order to reveal the characteristics and mechanism of microorganism in the tail water of subsurface constructed wetland, the plant roots in the tail water bypass system of the subsurface constructed wetland in Changzhou City North sewage treatment Plant were studied. Wetland fillers and microbes in wetland soil were studied by microscopic examination, urease, phospholipid fatty acid (PLFA) and other analytical methods. The results showed that plant roots and fillers contained micelles such as algae, rotifers, amoeba and other protozoa, and micromicelles such as alga were metabolized by their own metabolism and photosynthesis. Removal of Nu P in tail water under low carbon source conditions. The average content of urease in wetland is about 22.43 mg / g, and its activity is linearly related to the removal of TN, and the higher the activity is, the higher the removal rate of TN is. The content of saturated fatty acid (PLFAA) and unsaturated fatty acid (0.70m) in the packing of tail water wetland of the municipal sewage treatment plant were 99.30 and 0.70 respectively, which were different from the content of PLFA in the treatment of municipal sewage by subsurface flow constructed wetland (76.97N 23.03g, respectively). Taking fatty acid biomarker amount as the index, it was shown that the ecological structure of microorganisms was formed in the packing of wetland, which was dominated by well-bred bacteria. Algae, aerobic microorganism is the main carrier microorganism for removal of TN and other pollutants in low carbon source water.
【作者单位】：常州大学环境与安全工程学院;常州市环境科学研究院;
【基金】：“十二五”国家水体污染控制与治理科技重大专项(2012zx07301-001) 国家自然科学基金(41571471) 常州市和武进区科技支撑项目(CE20155061;WS201521)~~
【分类号】：X703

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