Research On Electrode Adjacent Area Substrate Concentration And Real-time Temperature Measurement Of MFC Battery

Microbial fuel cell(MFC) as a new generation of clean-energy technology. At the same time of produce new energy, it also can accelerate the degradation of organic matters in the waste water. Many factors affect the performance of the microorganism to generate electricity in the process of biochemical reaction, such as, microbial species, cell structure, PH value, substrate concentration and temperature. In many of these factors, the influence of substrate temperature and concentration is most important, because these parameters has the character of distribution, instantaneous change, which has a direct impact on the growth of microorganism, and then affect the performance of battery. Through the real time measurement of temperature and concentration on substrate, we can have a good understanding of biochemical reaction production which has important significance on the feature of electricity. In this paper, a type of FBG temperature-density sensor to have the real-time measurement on battery-electrode interface for substrate’s temperature and density. Though the analysis of matrix equation which measure temperature and density at the same time, we can solve the temperature and density cross-sensitivity, have the value of temperature and density with high accuracy. In this paper, the main content contains several points as below.(1)Designed and built a two-chamber microbial fuel cell’s experimental facility, analysis the factors that affect the electrical properties of the battery capacity. Successful operation of the microbial fuel cells, provided experimental basis for subsequent measurements.(2)Based on the theoretical analysis of the ordinary fiber Bragg grating, studied the relationship between corrosion type optical fiber Bragg grating’s reflection spectrum and external medium’s refractive index, received functional relationship between refractive index of external medium and effective refractive index of optical fiber Bragg transmission mode.(3)Designed and manufactured a corrosion-type FBG temperature – density sensor. By analyze the unique sensor structure, obtained the sensitive matrix equation, through the analysis of experimental data, obtained the high sensitive sensor with temperature compensation effect.(4)Designed and constructed of the experimental system which can measure temperature and density at the same time. This design made use of corrosion-type FBG temperature-density sensor simultaneous measure of temperature and density of sucrose solution. Experiments proved that, with the increase of the density of sucrose solution, the central wavelength of corrosion sensors are also linear drift, sensitivity coefficient reach to 5.42 nm / riu.(5)The design and construction of the experimental system of microbial fuel cell matrix simultaneous measurement of temperature and concentration. By calibrating temperature in sensitive matrix and refractive index, we can measure temperature and concentration of battery substrate in real time. Through experiments we got the change of substrate temperature and the change of voltage values is positive correlation,while density has some degree of decline.In this paper, the research work provides an excellent way for microscopic mechanism of biochemical reaction for microbial fuel cells. The fruit achieved in this paper have important significance to guide FBG sensor develop to multi-parameter measurement and highly sensitive.