| 基于呼吸图谱的自养菌与异养菌内源呼吸过程分析 |
| 摘要点击 2489 全文点击 1382 投稿时间：2014-01-27 修订日期：2014-03-19 |
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| 中文关键词 内源呼吸 比呼吸速率 异养菌 自养菌 饥饿 衰减速率 |
| 英文关键词 endogenous respiration specific respiration rate heterotrophic microbe autotrophic microbe starvation decay rate |
| 作者 | 单位 | E-mail | | 李志华 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | lizhihua@gmail.com | | 白旭丽 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | | | 张芹 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | | | 刘毅 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | | | 贺春博 | 西安建筑科技大学环境与市政工程学院, 西北水资源与环境生态教育部重点实验室, 西安 710055 | |
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| 中文摘要 |
| 内源呼吸是活性污泥重要的代谢过程，但目前对内源呼吸过程的认识较为模糊. 本研究采用呼吸图谱的方法，对以去除BOD为代表的异养菌和以硝化菌为代表的自养菌的内源呼吸特征进行了解析. 结果表明，上述两类细菌进入内源呼吸时间几乎相同，但异养菌进入休眠期较快，且处于休眠期的易恢复生物量比例较高，表明异养菌具有较强的环境适应能力，而自养菌则相反，因此，本研究从内源呼吸角度证实了自养菌较为脆弱. 另外，研究还发现，内源呼吸速率比例的增大反映出污泥活性变差，是表征活性污泥活性的重要参数，可作为活性污泥健康状态的定量描述指标. 本研究成果深化了内源呼吸过程的进一步认识，为污水处理厂运行管理提供理论基础. |
| 英文摘要 |
| The endogenous process is an important metabolic part of the activated sludge, and the understanding of this process is still unclear. Characteristics of endogenous respiration for heterotrophic bacteria and autotrophic nitrifiers were analyzed using respirogram. Results showed that both heterotrophic and autotrophic bacteria entered the stage of endogenous respiration at almost the same time, but heterotrophic bacteria first entered the stage of dormancy i. e., they were easier to recover a higher proportion of biomass during the dormancy stage, indicating that heterotrophic bacteria exhibited strong environmental adaptability. Autotrophic bacteria were, however, quite different. This finding confirmed that autotrophic bacteria were more vulnerable from the viewpoint of endogenous respiration. In addition, the study also found that the increase of endogenous respiration rate ratio reflected the decreased sludge activity. And the proportion of endogenous respiration was an important parameter to characterize the activity of activated sludge, which can be used as a quantitative index for the health status of activated sludge. The findings further deepened the understanding of endogenous respiration process and provided a theoretical basis for the operation and management of wastewater treatment plants. |
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