Portable fluorescence instrument for detecting membrane integrity in membrane bioreactor (MBR)

IF 6.1 2区 环境科学与生态学 Q2 ENGINEERING, ENVIRONMENTAL
Yang Yu, Changchun Xin, Yuxiang Liu, Fei Gao, Lei Zhang, Hui Jia, Jie Wang
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Abstract

This study proposed the design, fabrication, and assembly of membrane integrity detection instruments in membrane bioreactors (MBR) based on fluorescence spectroscopy. Based on the PARAFAC model, we found that the peak at 280/335 nm strengthened after membrane breakage. The peak at 340/430 nm reflected the sludge concentration in the MBR and reduced the influence of internal filtration effects on detection. Therefore, we determined that the dual-LED light source excitation detection system can detect tryptophan-like substances at 280 nm (T-peak) and humic acid at 340 nm (C-peak). T-peak was identified as the core index indicating membrane integrity. Moreover, the C-peak is the reference indicator factor for a sensitive response to changes in the sludge concentration. The portable fluorescence instrument exhibited high sensitivity and good feedback accuracy compared to particle counting and turbidity detection, where the log reduction value was greater than 3.5. This overcomes the disadvantage of false alarms in particle counters and is not affected by the position of the pump system. This portable instrument provides a flexible and highly sensitive method for the assessment of industrial membrane integrity.

Abstract Image

便携式荧光仪用于膜生物反应器(MBR)膜完整性检测
本研究提出了基于荧光光谱的膜生物反应器(MBR)中膜完整性检测仪器的设计、制造和组装。基于PARAFAC模型,我们发现280/335 nm处的峰在破膜后增强。340/430 nm处的峰值反映了MBR中污泥浓度,降低了内过滤效应对检测的影响。因此,我们确定双led光源激发检测系统可以检测280 nm (t峰)色氨酸样物质和340 nm (c峰)腐植酸。t峰被确定为反映膜完整性的核心指标。此外,c峰是对污泥浓度变化敏感响应的参考指标因子。与颗粒计数和浑浊度检测相比,便携式荧光仪灵敏度高,反馈精度好,对数约简值均大于3.5。这克服了粒子计数器虚警的缺点,并且不受泵系统位置的影响。该便携式仪器为工业膜的完整性评估提供了一种灵活、高灵敏度的方法。
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来源期刊
Frontiers of Environmental Science & Engineering
Frontiers of Environmental Science & Engineering ENGINEERING, ENVIRONMENTAL-ENVIRONMENTAL SCIENCES
CiteScore
10.90
自引率
12.50%
发文量
988
审稿时长
6.1 months
期刊介绍: Frontiers of Environmental Science & Engineering (FESE) is an international journal for researchers interested in a wide range of environmental disciplines. The journal''s aim is to advance and disseminate knowledge in all main branches of environmental science & engineering. The journal emphasizes papers in developing fields, as well as papers showing the interaction between environmental disciplines and other disciplines. FESE is a bi-monthly journal. Its peer-reviewed contents consist of a broad blend of reviews, research papers, policy analyses, short communications, and opinions. Nonscheduled “special issue” and "hot topic", including a review article followed by a couple of related research articles, are organized to publish novel contributions and breaking results on all aspects of environmental field.
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