| 炭膜曝气生物膜反应器硝化作用及其微生物群落结构分析 |
| 摘要点击 1765 全文点击 994 投稿时间：2006-11-09 修订日期：2007-01-08 |
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| 中文关键词 炭膜曝气生物膜反应器 氧的利用 氨氮去除速率 荧光原位杂交（FISH） 群落结构分析 |
| 英文关键词 carbon membrane-aerated biofilm reactor (CMABR) oxygen utilization removal rate of NH+4-N fluorescent in situ hybridization (FISH) community analysis |
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| 中文摘要 |
| 采用炭膜曝气生物膜反应器处理无机含氮废水，通过改变进水氨氮浓度和水力停留时间，研究了反应器硝化性能、氧利用情况以及氨氮去除负荷，并对生物膜表面特性和硝化菌优势菌种进行分析.结果表明， 在膜内气压0.017 MPa，进水NH+4-N 50 mg/L,HRT为8 h条件下，NH+4-N去除率达到96%，出水NO-2-N平均为17 mg/L，一定程度上实现了短程硝化，炭膜所供给氧气被生物膜全部消耗；系统比表面氨氮最大去除速率为9.7 g/(m2·d)，炭膜表面有限的生物量制约了去除速率的进一步提高； 荧光原位杂交技术分析揭示生物膜内亚硝化单胞菌（Nitrosomonas）和亚硝化螺菌（Nitrosospira）为亚硝化细菌优势菌种，分别占细菌总菌数的19%和21%，硝化螺菌（Nitrospira）为硝化细菌优势菌种，占总菌数的20%，未检测到硝化杆菌（Nitrobacter）的存在. |
| 英文摘要 |
| A carbon membrane-aerated biofilm reactor was developed to treat nitrogenous inorganic wastewater. Influent NH+4-N concentrations and HRT were changed to investigate nitrification performance of reactor，oxygen utilization and NH+4-N's removal loading. Biofilm's surface characteristics and dominant bacteria of nitrifier were analyzed. The results show that under the conditions of intra-membrane pressure of 0.017 MPa, influent NH+4-N of 50 mg/L and HRT of 8 h NH+4-N removal efficiency reaches 96% and effluent average nitrite is 17 mg/L, which benefits short-cut nitrification to a certain extent. The bacteria within biofilm consume all oxygen supplied through carbon membrane. The maximum specific removal rate of NH+4-N is 9.7 g/(m2·d), which is limited by the amount of bacteria grown onto carbon membrane's surface. Fluorescent in situ hybridization analysis indicates that within the biofilm Nitrosomonas and Nitrosospira are main ammonia-oxidizing bacteria and occupy about 19% and 21% of the total bacteria number, respectively. The Nitrobacter are not observed and Nitrospira are dominant nitrite-oxidizing bacteria, the fraction of which is 20 % of total bacteria. |
