The Study On The Electricity Generation And Anline Wastewater Treatment In Photosynthetic Algal Microbial Fuel Cell With Chlorella Vulgari

The phenomena such as the over-use of energy, water resources shortage as well as environmental pollution are increasingly severe and seriously restrict the development of human beings and the countries. Therefore, so far our country focuses on the technology of development and utilization in the new energy and Microbial Fuel Cell (MFC) has attracted much attention in the field of environmental engineering. MFC is the sustainable energy and environment technology. In general, just as the common cell, there are both anode and cathode in the traditional MFC. The cathode can be divided into biological cathode and non-biological cathode based on the different filler types since there are a lot of fillers for the cathode. For instance, air cathode is non-biological cathode, which is widely used in the research; however, there are still quite a few defects such as high cost, relatively complex production process, difficult to recycle and high risk in the secondary pollution etc. Therefore, this thesis integrates MFC and the algae and puts forward a new technology of wastewater treatment, that is, photosynthetic alga microbial fuel cell (PAMFC). This thesis studies the different factors'influence on PAMFC electricity generation performance, the optimal operation conditions and its feasibility of PAMFC through the degradation of aniline and COD and the growth conditions of chlorella in PAMFC, and finally get the conclusions as below:(1) Under the conditions with different substrates on the anode, different temperature, light intensity and the anolyte pH value, contrastive analysis on the voltage curve with time, polarization curve and power density curve while PAMFC is running are made. The study shows that optimum operation conditions of PAMFC is 30?,12W illumination intensity and a pH value of 6, taking the sodium acetate as the anode substrates. The electricity generation performance of cells is closely related with the environment and it can be effectively improved by changing its influential factors.(2) PAMFC is running under 30?,12W illumination intensity and a pH value of 6, taking the sodium acetate as the anode substrates and this thesis makes the study on the removal efficiency of aniline wastewater and chemical oxygen demand (COD) on the basis of PAMFC's electricity generation. It studies the cell performance while taking sodium acetate and aniline with different initial concentration as PAMFC's substrates as well as the degradation of aniline and COD under the optimal operation conditions of PAMFC. The research shows that PAMFC has preferable removal effect on aniline and COD, and PAMFC not only has good electricity generation performance and also improves the removal rate of aniline and COD (achieving 80%) when adding moderate sodium acetate solution in the anolyte. In addition, PAMFC is more advantageous to the degradation of aniline when it is in the closed circuit.(3) This thesis analyzes the growth status, growth curve, chlorophyll content and nutrient content of chlorella under three different conditions:PAMFC not dealing with aniline wastewater, PAMFC dealing with aniline wastewater and the control group. It draws the conclusion that PAMFC is able to obtain the additional algal biomass, pigment value as well as nutritional value in dealing with the aniline material and getting the electrical energy.