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Microbial fuel cell biosensor for the determination of biochemical oxygen demand of wastewater samples containing readily and slowly biodegradable organics
Biotechnology Letters ( IF 2.7 ) Pub Date : 2020-11-27 , DOI: 10.1007/s10529-020-03050-5
Gábor Márk Tardy 1 , Bálint Lóránt 1 , Miklós Gyalai-Korpos 2, 3 , Vince Bakos 1 , David Simpson 4 , Igor Goryanin 4, 5, 6
Affiliation  

OBJECTIVES Single-chamber air cathode microbial fuel cells (MFCs) were applied as biosensors for biochemical oxygen demand (BOD) measurement of real wastewaters with considerable suspended and/or slowly biodegradable organic content. RESULTS The measurement method consists of batch sample injection, continuous measurement of cell voltage and calculation of total charge (Q) gained during the biodegradation of organic content. Diverse samples were analyzed: acetate and peptone samples containing only soluble readily biodegradable substrates; corn starch and milk samples with suspended and colloidal organics; real domestic and brewery wastewaters. Linear regression fitted to the Q vs. BOD5 measurement points of the real wastewaters provided high (> 0.985) R2 values. Time requirement of the measurement varied from 1 to 4 days, depending on the composition of the sample. CONCLUSIONS Relative error of BOD measured in the MFCs comparing with BOD5 was less than 10%, thus the method might be a good basis for the development of on-site automatic BOD sensors for real wastewater samples.

中文翻译:

微生物燃料电池生物传感器用于测定含有易和缓慢生物降解有机物的废水样品的生化需氧量

目标 单室空气阴极微生物燃料电池 (MFC) 被用作生物传感器,用于测量具有大量悬浮和/或缓慢生物降解有机物的真实废水的生化需氧量 (BOD)。结果 测量方法包括分批进样、连续测量电池电压和计算有机物生物降解过程中获得的总电荷 (Q)。分析了不同的样品:醋酸盐和蛋白胨样品仅含有可溶性易生物降解底物;含有悬浮有机物和胶体有机物的玉米淀粉和牛奶样品;真正的生活和啤酒厂废水。拟合实际废水的 Q 与 BOD5 测量点的线性回归提供了高 (> 0.985) R2 值。测量的时间要求从 1 到 4 天不等,取决于样品的成分。结论 MFC 中测量的 BOD 与 BOD5 的相对误差小于 10%,因此该方法可能是开发用于实际废水样品的现场自动 BOD 传感器的良好基础。
更新日期:2020-11-27
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