摘要:
设计构建了植物-水生动物-填料生态反应器，以强化景观水体生态修复效果。实验中构建了美人蕉-组合填料-泥鳅生态反应器，以上海市绥宁河富营养化河水为实验用水。采用近自然的静态处理方式，经过120 h，TP、NH+4-N和TN去除率分别为68.5%、46.0%和53.8%，较对照1（无美人蕉和泥鳅，其他条件相同）分别提高52.3%、40.4%和43.3%。反应器中美人蕉根系生物膜中异养细菌、硝酸细菌、亚硝酸细菌数量分别为3.98E+08 CFU/g、8.20E+04 CFU/g和6.01E+03 CFU/g，较填料生物膜中相应细菌分别高出5.6倍、3.4倍和4.0倍。而根系和填料生物膜中反硝化细菌的数量水平相当，分别为1.09E+03 CFU/g和1.41E+03 CFU/g。根系泌氧能够改善根系生物膜含氧状态，使其成为硝化作用的主要场所。植物根系和填料生物膜内部存在兼性厌氧微环境，使反硝化作用得以进行，有利于总氮的去除。微生物群落的ERIC-PCR指纹图分析说明，美人蕉、泥鳅为填料生物膜微生物提供了有利的生存和作用的生态环境。
Abstract:
A plant-aquatic animal-combined packing eco-reactor(PAPER) was constructed to enhance the ecological remediation effects of scenic water. In this study, a Canna indic-combined packing-Cantor PAPER was built to treat the eutrophic Suining River in Shanghai. The polluted river water was inpoured into the device, batch process was used. 120 hours later, TP, NH+4-N, and TN removal rates were 68.5%, 46.0% and 53.8% respectively，which were 52.3%, 40.4% and 43.3% higher than those in the contrast experiment (without Canna indic and Cantor). Amounts of heterotrophic bacteria, nitrate bacteria, nitrite bacteria in root biofilms were 3.98E+08 CFU/g, 8.20E+04 CFU/g, 6.01E+03 CFU/g respectively, which were 5.6,3.4 and 4.0 times higher than those in the packing biofilms. Denitrifying bacteria amounts in PAPER root films and packing films were respectively 1.09E+03 CFU/g and 1.41E+03 CFU/g. Roots could provide root biofilm with oxygen, so that nitrification could take place. There was unique anaerobic micro-environment in root biofilms and packing biofilms. Under this condition, denitrification could carry out and TN removal could have good effects. Analysis of ERIC-PCR fingerprints of biofilms shows that Canna indic and Cantor could provide packing biofilm microorganisms with advantageous ecological environment.
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