Department of Environmental Engineering, Technical University of Denmark, DK-2800 Lyngby, Denmark.
Bioelectrochemistry. 2011 Jun;81(2):99-103. doi: 10.1016/j.bioelechem.2011.02.002. Epub 2011 Feb 16.
The biological oxygen demand (BOD) may be the most used test to assess the amount of pollutant organic matter in water; however, it is time and labor consuming, and is done ex-situ. A BOD biosensor based on the microbial fuel cell principle was tested for online and in situ monitoring of biodegradable organic content of domestic wastewater. A stable current density of 282±23mA/m(2) was obtained with domestic wastewater containing a BOD(5) of 317±15mg O(2)/L at 22±2°C, 1.53±0.04mS/cm and pH 6.9±0.1. The current density showed a linear relationship with BOD(5) concentration ranging from 17±0.5mg O(2)/L to 78±7.6mg O(2)/L. The current generation from the BOD biosensor was dependent on the measurement conditions such as temperature, conductivity, and pH. Thus, a correction factor should be applied to measurements done under different environmental conditions from the ones used in the calibration. These results provide useful information for the development of a biosensor for real-time in situ monitoring of wastewater quality.
生物需氧量 (BOD) 可能是评估水中污染物有机物质含量最常用的测试方法；然而，它既费时又费力，而且是在现场外进行的。本研究基于微生物燃料电池原理，测试了基于微生物燃料电池原理的 BOD 生物传感器，以在线和原位监测生活污水中可生物降解的有机含量。在 22±2°C、1.53±0.04mS/cm 和 pH 6.9±0.1 的条件下，含 BOD(5) 为 317±15mg O(2)/L 的生活污水中可获得稳定的电流密度 282±23mA/m(2)。电流密度与 BOD(5)浓度呈线性关系，范围从 17±0.5mg O(2)/L 到 78±7.6mg O(2)/L。BOD 生物传感器的电流产生取决于测量条件，如温度、电导率和 pH。因此，应在与校准中使用的环境条件不同的环境条件下进行测量时应用校正因子。这些结果为开发用于实时原位监测废水质量的生物传感器提供了有用的信息。
