氨遷移對(duì)陰極反硝化雙室微生物燃料電池產(chǎn)電性能及脫氮效率的影響實(shí)驗(yàn)
[Abstract]:Microbial fuel cell (MFC) is a kind of equipment which converts the chemical energy in fuel into electric energy by using microorganism as catalyst. MFC is a clean and renewable energy technology which uses microorganism to treat wastewater and generates electricity simultaneously. In addition, because of the wide sources of fuel, mild reaction conditions and no combustion process in the energy conversion process, the conversion efficiency is relatively high, so it is a new green sewage treatment technology. According to the separation of anode chamber and cathode chamber, MFC can be divided into single chamber MFC and double chamber MFC.. The cathode denitrification reaction in two-compartment MFC is called cathodic denitrification double-compartment MFC. The development of dual-chamber MFC with cathode denitrification is restricted by the long start-up time, low denitrification efficiency and complex reaction process. In this study, the start-up process of cathode denitrification dual-chamber MFC was carried out by means of continuous influent. The effects of ammonia transfer on the electrical properties and denitrification efficiency of MFC and the amount of nitrous oxide produced in the denitrification process of MFC with cathodic denitrification were studied. The conclusions are as follows: 1. In the start-up stage of dual-chamber MFC of cathodic denitrification, the voltage reversal phenomenon of anode potential will be reduced rapidly and the cathode potential will be stabilized, and the cathode potential will have a slight upward trend. The addition of DC power can promote the stability of the anode and the cathode, but the effect is not obvious. 2. The addition of DC power source makes the output current of MFC increase obviously under the same external resistance, which can promote the optimization of MFC internal resistance. 3. After the ammonia nitrogen diffused from anode to cathode, the output voltage of MFC decreased sharply and the removal rate of total nitrogen decreased. The migration of ammonia nitrogen can inhibit the electric performance and denitrification efficiency of microbial fuel cells. 4. The concentration of NO3-N,NO2-N,NH4-N,N2O in double-chamber MFC of cathodic denitrification has different trends under different concentration of ammonia nitrogen and dissolved oxygen. Nitrification, denitrification, short-cut nitrification and denitrification will occur in the cathode room without controlling dissolved oxygen, and a series of nitrous oxide reactions may occur.
【學(xué)位授予單位】:長安大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:TM911.45
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