生态浮床-简易湿地组合系统对富营养化水体净化效果研究

[目的]研究生态浮床-简易湿地处理系统对富营养化水体的净化效果,以期为进一步开展人工湿地和生态浮床技术相组合的研究及污水、富营养化水体的生态修复提供科学的理论依据。[方法]将生态浮床-简易湿地组合成复合的生态浮床-简易湿地处理系统,通过室内模型试验和在该系统内种植黑麦草,研究该组合系统对富营养化水体中TN、TP、CODMn、BOD5、NH4-N等指标的净化效果。[结果]在冬季,生态浮床-简易湿地组合系统处理效果相当好,其对富营养化水体中TN、TP、CODMn、BOD5、NH4-N的平均去除率分别为53.5%、74.3%、41.8%、65.5%和37.8%以上。[结论]生态浮床-简易湿地组合系统对富营养化水体的净化效果明显较单一的生态浮床或简易人工湿地系统要好。

微曝气生态浮床净化井研县茫溪河水质工程设计

近年来茫溪河水质日益恶化,河水中氮、磷富营养化程度不断加剧,从而造成井研县内水资源紧缺,因此对于茫溪河水质净化迫在眉睫。通过资料查找,得到目前茫溪河水质类别为Ⅴ类甚至是劣Ⅴ类,属于氨氮营养型污染。针对上述问题,在传统生态浮床基础上设计了一套完整的微曝气生态浮床系统,以此来净化茫溪河水质,此系统主要由湿式有框浮床悬挂弹性立体填料+微曝气系统组成。

SFTWs中浮游植物特征及其与水环境的相关性研究

[目的]研究SFTWS中浮游植物特征及其与水环境的相关性。[方法]以上海虹桥交通枢纽河段的梯级生态浮床系统为研究对象,探究浮游植物群落结构、多样性指数及其与水质净化效果的相关性。[结果]该河段共鉴得浮游植物7门57种。其中,蓝藻门12种,隐藻门2种,硅藻门10种,黄藻门1种,裸藻门7种,甲藻门1种,绿藻门24种;浮游植物优势种多为蓝藻门、硅藻门和绿藻门;生物密度远大于10×105ind./L,均为富营养型;香侬指数为0.6~2.2,丰富度为0.5~2.5,均匀度为0.35~0.85,说明水体属于富营养型;生物密度和种类与温度和N含量呈极显著正相关,说明浮游植物对N的吸收是系统除N的重要途径。[结论]该研究结果为城市河道治理与生态修复提供了参考。

水生经济植物根际氮循环细菌及其作用的研究

利用生态浮床系统,在室内研究了浮床植物单作和混作对氮的去除效果及其根际周围硝化与反硝化菌种群数量以及硝化与反硝化作用速率的变化规律。结果表明,浮床植物混作系统对氮的去除效果优于植物单作和无植物系统,而植物系统又优于无植物系统;植物单作与混作根际硝化细菌种群数量和硝化作用速率、反硝化细菌种群数量和反硝化作用速率均具有明显的差异;处理15 d后,硝化细菌种群数量在水芹系统中的减少较比豆瓣菜和混作系统多,硝化作用速率在水芹系统中的降低较豆瓣菜和混作系统明显(P<0.05);反硝化细菌种群数量由多到少的顺序分别为水芹系统,豆瓣菜系统,混作系统,无植物系统;且反硝化作用速率由高到低的顺序分别为水芹系统,豆瓣菜系统,混作系统,无植物系统。

Characteristics of Phytoplankton and Its Correlation with Water Environment in SFTWs

[Objective] The aim was to carry out study on characteristics of phytoplankton and its correlation with water environment in SFTWs. [Method] Based on the pilot-scale SFTWs in Hongqiao transportation hub of Shanghai,phytoplankton＇s community structure,diversity index and their correlation with water purification performance were investigated. [Result] 57 species of seven phylum of phytoplankton were detected in this tested river,including 12 species of Cyanophyta,2 of Cryptophyta,10 of Bacillariophyta,1 of Xanthophyta,7 of Euglenophyta,1 of Pyrrophyta and 24 of Chlorophyta,respectively. Additionally,it was found that Cyanophyta was the dominant phytoplankton,followed by Bacillariophyta and Cyanophyta. Biological density was far more than 10×105 ind./L,thus it could be considered that the river was eutrophic. The range of Shannon-Wiener index was 0.6-2.2,Pielou index was 0.5-2.5 and Margalef index＇s range was 0.35-0.85,which could further prove that the water was eutrophic. The biological density and species were significantly positively correlated with temperature and N content,indicating that the absorption of N by phytoplankton was the main N-removal pathway in SFTWs. [Conclusion] This study had provided basis for the river regulation and ecological restoration.