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Monitoring Microalgal Biofilm Growth and Phenol Degradation With Fiber-Optic Sensors

Monitoring Microalgal Biofilm Growth and Phenol Degradation With Fiber-Optic Sensors

Nianbing Zhong, Yongwu Wu, Zhengkun Wang, Haixing Chang, Dengjie Zhong, Yunlan Xu, Xinyu Hu, Liwen Huang

Anal Chem. 2019 Dec 3;91(23):15155-15162.

PMID: 31663721

Abstract:

Simple D-type plastic optical fiber (POF) probes (i.e., sensor, reference, and photochemical probes) were created to accurately monitor the progression and phenol degradation of a Chlorella vulgaris biofilm. The sensor and reference probes were used to monitor the biofilm growth (thickness). The sensor probe, which consisted of a D-shaped POF and Canada balsam doped with GeO2 (CBG) coating, was developed to monitor the biofilm growth and change in the liquid-phase composition and its concentration inside the biofilm. The reference probe, which comprised a D-shaped POF, CBG coating, and glass fiber membrane (to separate the liquids from Chlorella vulgaris), was used to measure the response to changes in the liquid phase. A model was developed to demonstrate the accurate measurement of the biofilm thickness. The photochemical POF probe was coupled with a high-permselectivity phenol polymer membrane to monitor the phenol concentration and analyze the degradation time of 50 mg/L phenol with microalgal biofilms. A fixed relationship was obtained between the biofilm sensor output information and biofilm thickness for a biofilm thickness range of 0-290 μm with a periodic supply of 50 mg/L phenol solution. The highest phenol degradation rate occurred at a biofilm thickness of 191-222 μm. The proposed system can be used to investigate microalgal biomass and can provide a promising avenue for research on renewable resources and pollutant degradation.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP8007474-B	Canada balsam solution		8007-47-4	Price

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