Microfluidic chip-based microbial metabolism-indexed BOD sensor for rapid determination of biochemical oxygen demand

文献类型： 外文期刊

第一作者： Lin, Haifeng

作者： Lin, Haifeng;Wang, Xiaorui;Lin, Ling;Lin, Haifeng;Xing, Gaowa;Shang, Yuting;Xu, Ning

作者机构：

关键词： Microfluidic chip; Microbial metabolism; BOD5; Rapid determination; Biochemical demand; BOD sensor

期刊名称：SENSORS AND ACTUATORS B-CHEMICAL （ 影响因子：8.4； 五年影响因子：7.2 ）

ISSN：

年卷期： 2024 年 400 卷

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收录情况： SCI

摘要： Reliance on five-day biochemical oxygen demand (BOD5) as an indicator of water quality has inhibited the development of efficient process control due to the associated uncertainty and lag time. In the work, we proposed a novel strategy for rapid on -site BOD5 determination by a microfluidic chip -based microbial metabolismindexed BOD sensor (MCB-MMI BOD sensor). The rapid on -site BOD5 detection was achieved by quantifying the equilibrium concentration of tryptophan involved in aerobic biodegradation for alternating the traditional 5day monitoring of dissolved oxygen variation. The regulated metabolized tryptophan was identified by fluorescence spectrum and converted into BOD5 value. The prominent performance for MCB-MMI BOD sensor BOD5 determination was accessible in the field application, such as decreasing detection time from 5 days to 10 min, lowering sample volume from 250 mL to 2.5 mL, diminishing the working area, extending the detection range (without dilution) from 6 mg/L to 27 mg/L, featured with 83% accuracy, and free -labor automation, which exhibited the infinite potential for MCB-MMI BOD sensor on rapid on -site BOD5 monitoring. We believe the MCBMMI BOD sensor would broaden its practical applications in BOD5-contained multiple -parameters water quality sensing, and would favorably supply a new tool for sewage -treatment process control, environmental monitoring, and aquaculture.

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