Studies On Structure Improvement And Chinese Medicine Wastewater Treatment Abilities Of Two-chamber Microbial Fuel Cell

The improvement of two-chamber microbial fuel cell power generation ability and reducing internal resistance and cost are the premises of practical engineering. This paper attempts to improve the structure of salt bridge two-chamber MFC in order to improve the power generation, reduce the internal resistance, and at the same time degrade the organic substrate. This paper also discusses the three different based PbO2 electrode (Ti-base, steel-base, graphite-base) production methods, and compares them with Pt electrode on their potential power generation ability to find out a suitable PbO2 electrode in MFC. With the above conclusions, this paper studies on simultaneous high concentration Chinese medicine wastewater bio-treatment and power generation by two-chamber MFC. The experiment results are listed below: After structural improvements, the small resistance proton-wall MFC is the best. Its maximum power density is 250 mW?m-2, COD degradation is up to 90%,. However, each MFC reactor will increase the internal resistance during operation: the proton bridge MFC reactor increased from 2000? to 18000?, the two kinds of proton wall MFC reactor increased from 600? to 2000?. MFC systems degrade the organic substance more than ordinary anaerobic systems.Ti-PbO2 electrode, prepared by electro-deposition, has the following advantages: high purity, dense structure, corrosion resistance and good stability. So as a cathode material, it has good performance in power generation and COD degradation in proton wall MFC reactor.The small resistance proton-wall MFC is feasible to degrade Chinese medicine wastewater. This system can generate 40 mW?m-2 power density continuously, with the internal resistance--600 ?. The COD degradation is 67 %. The chrominance degradation is 97 %. And the B/C of wastewater can change from 14 % to 26 %, which shows the system improved the biodegradability of Chinese medicine wastewater.This paper's results show that the improved 2-chamber MFC can increase the energy output in the basis of lower costs, and it is conducive to carrying out the project. At the same time, the improved MFC has power generation potential in dealing with high concentration Chinese medicine wastewater.