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Fiber sensor of online biomass testing

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Abstract

A new testing method for biomass concentration and sensor design is developed to realize online testing of biomass concentration in the microbial bacterium liquid. The sensor structure theory, optical path, theory analysis and experiment are studied in-depth. First, the optical absorption and optical scattering are related to the optical distance and incidence energy. The change in biomass concentration will cause the change in optical absorption and optical scattering, and then lead to the change in the receiving energy. Based on the physical phenomena and theory, the paper relates the receiving energy to biomass concentration testing, and a new method to measure the biomass concentration is set up. In the experiment, a lamp-house with 760 nm wavelength is chosen. Under the 20°C constant temperature, the experiment is performed on the biomass concentration test. The results indicate that the method is good for testing bacterium liquid concentration, with maximum relative error less than 0.2%. The method, which has merits such as precise online testing, high sensitivity and long life, is a practical new style biomass concentration sensor.

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Authors and Affiliations

  1. Department of Electronic Engineering, Chongqing Institute of Technology, Chongqing, 400050, China

    Mingfu Zhao, Yan Chen & Nianbing Zhong

  2. Institute of Engineering Thermophysics, Chongqing University, Chongqing, 400044, China

    Mingfu Zhao & Qiang Liao

Authors
  1. Mingfu Zhao
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  2. Qiang Liao
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  3. Yan Chen
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  4. Nianbing Zhong
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Corresponding author

Correspondence to Mingfu Zhao.

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Translated from Optics and Precision Engineering, 2007, 15(4): 478–485 [译自: 光学精密工程]

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Zhao, M., Liao, Q., Chen, Y. et al. Fiber sensor of online biomass testing. Front. Optoelectron. China 1, 85–90 (2008). https://doi.org/10.1007/s12200-008-0035-z

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  • DOI: https://doi.org/10.1007/s12200-008-0035-z

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