| 产电微生物反应系统内电阻的快速测定 |
| 摘要点击 1796 全文点击 852 投稿时间：2010-01-06 修订日期：2010-03-28 |
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| 中文关键词 产电微生物 内阻测定 极化曲线 稳定时间 调节步长 |
| 英文关键词 electricigenic microorganism internal resistance measurement polarization curve stabilizing time step width |
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| 中文摘要 |
| 内阻是表征反应器内部状态的重要参数.传统的极化曲线法存在耗时长、对系统日常运行干扰严重等问题.本研究尝试通过减小可变外阻的调节范围，使系统内阻的测定可以在非常接近于系统日常运行状态的有限外阻变化范围内完成，在实现内阻快速测定的同时，有效控制了测定过程对系统运行状态的干扰.在外阻调节步长为10 Ω，电压稳定时间1 min条件下，单次测定用时缩短到10 min,测定前后系统电流的变化<1.5%.不同稳定时间对内阻测定结果的影响不大.减小外阻调节步长虽然有助于降低测量过程对系统运行的干扰，但在相同万用表精度下，测量误差有增大的趋势.本研究所提出的方法能够比较实时地反映系统内阻的变化情况. |
| 英文摘要 |
| Internal resistance (Rint is an important parameter for kinetic studies on an electricigenic microorganism reaction system (EMRS). The traditional polarization curve measurement method is too laborious and tedious,usually leads to remarkable disturbance on system running. An improved method was put forward in this study,by decreasing the adjustment range of the external resistance value (Rext). In the situation of 10 Ω of Rext step length and 1min of voltage stabilization time,the whole test can be finished in 10 min,and the differences of the system current before and after Rint determination were less than 20 μA. Different stabilization time has little influence on the results. Though to shorten the Rext step length can lessen the disturbance on the system running,it simultaneously leads to a larger measurement errors because of the multimeter precision limitation. The method advanced may be used to monitor the real-time Rint change of EMRS. |
