溶氧状况对美人蕉根系特征和畜禽废水处理效果的影响  

Effecs of Oxygenation on Canna Root Characteristics and Treatment of Swine Waster Water

作　　者：范子红[1] 刘超翔[1] 于鑫[1] 高春芳[1] 

机构地区：[1]中国科学院城市环境研究所,福建厦门361021

出　　处：《土木建筑与环境工程》2011年第1期124-128,共5页Journal of Civil,Architectural & Environment Engineering

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-451)

摘　　要：分别采用标准氧化染色法和正立荧光电子显微镜研究了美人蕉在自然、缺氧和好氧3种溶氧条件下的根部径向泌氧(radial oxygen loss,ROL)类型和特征以及不同ROL位置的空隙和泌氧屏障变化,分析溶氧条件对美人蕉浮床系统处理畜禽废水的影响。自然状况下ROL在任何位置都很强,且不随根的部位的变化而变化;缺氧情况下,根尖区域泌氧最强烈,沿根基方向迅速降低;好氧条件下,根部任何位置泌氧都非常微弱。ROL越强对应的根部孔隙越大,泌氧屏障也越厚。水体缺氧时泌氧作用能使水体达到好氧状态。好氧条件下,美人蕉浮床系统对氨氮和总氮的去除率分别达到62.36%和47.90%。并出现硝酸盐氮累积增加的现象。The patterns and characteristics of radial oxygen loss（ROL）under natural,aerobiotic and anoxic conditions were investigated respectively by the standard oxidized dye（methylene blue agar）method.And the characteristics of pore and oxygen loss barriers were observed by using the front stand fluorescence microscope.Based on these experiments,the effects of oxygenation conditions on treatment of swine waste water controlled by canna floating bed technology were analyzed.ROL is very low in any pot in aerobiotic conditions,and it reaches its peak in root apex zone and declines dramatically along the rhizel in anoxic condition.ROL is high in every pot under natural conditions.Corresponding to the higher ROL,the pore is bigger and the oxygen loss barrier is thicker.ROL makes water aerobiotic.The removal rates of NH3-N and TN were 62.36% and 47.9% respectively by taking canna floating bed technology,and NO3＋-N accumulated and increased under aerobiotic condition.

关 键 词：美人蕉 径向泌氧 泌氧屏障 污水处理 

分 类 号：X703.1[环境科学与工程—环境工程]