Effects of Electric Current on the Performance of the Bio-hydrogen Production

• Main Authors: Sih-hua Zeng, 曾思華
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/43995199563539696537

碩士 === 雲林科技大學 === 環境與安全工程系碩士班 === 98 === In recent years the global energy demand increased, in order to satisfy the a large amount of energy demand, humanity''s unlimited use tradition energy: Fossil fuels and so on coal and petroleum, cause the fossil fuel silently ground to be already near the depletion to exhaust. The traditional energy use creates the focal point to the environment which it affects internationally into gazes, therefore seeks clean also regeneration energy the zero emissions (Renewable energy), namely becomes the present most important research subject. The hydrogen ability is one of the renewable energy focused attention most currently, and the living creature produce hydrogen procedure to only need in the normal temperature and often press down to carry on and have the advantage that the cleanness, economy energy and resource are recycled, past the living creature produce hydrogen is and have green environmental protection and sustainable development of procedure. This research makes use of CSTR to respond slot, inquire into the in addition electric current produces the influence of hydrogen effect good and bad on microorganism. Germ kind the dirty water field that come from science and technology university in Yunlin abandons live dirty mire, first with hot Shai method processing behind raise and train for more than a year, again with the water power stop over a time(HRT)6 hrs, the cane sugar density 20 gCOD/L for Ji quality, at the pH 6.6 and temperature 35 ℃ carry on a continuous operation, and the in addition little electric current 10~40 mA(the electric current density 0.6~2.1 mA/cm2) is at the RuO2 electrodes it produce hydrogen slot. Expect to be disgusted with making use of oxygen to produce a hydrogen mechanism: The ferredoxin delivers the electronics to the hydrogenase, ATP of formation makes electronics and proton combined to produce the principle of the hydrogen, and the study can produce a hydrogen density to have influence towards producing hydrogen velocity and; Also take into to examine to produce the appearance of the hydrogen germ whether has a change because the in addition electric current relates to. The research shows as a result the in addition little electric current is at the RuO2 electrode, contribute to increment to respond germ inside the slot to consider; And RuO2 the electrodes have to defend causticity and have acceleration to oxidize revivification reaction. Along with the increment of electric current strength, produce a hydrogen velocity, hydrogen density to increase first anti- reduce. Don''t add electric current, it producing and annoying the velocity is a 940 mL/L.hr, hydrogen density is 32%;And through the in addition electric current 0.6~2.1 mA/cm2 behind produce the spirit velocity as 1020~1306 mL/L.hr, its hydrogen density is 36~45%.When the electric current density is a 1.1 mA/cm2, produce hydrogen velocity the best is a 560 mL/L.hr. But produce hydrogen germ over the 1.6 mA/cm2, it produces hydrogen ability and then starts decelerating and reduces. Grow consultation to know this research through the germ, it produces the hydrogen slot advantage germ to grow for the Clostridium ljungdahlii; And make use of the field deliver type the electronic microscope observe germ stub appearance, detection be produce hydrogen germ in produce a hydrogen efficiency better, the appearance then is longer. When producing hydrogen germ is shorter, it produces hydrogen ability more slow-moving. And didn''t add the comparison of the germ stub of electric current and in addition electric current, was after the in addition electric current germ stub length a little bit consistently stable, and the germ stub''s appearance is under the in addition electric current 10 mA(0.6 mA/cm2) and the 20 mA(1.1 mA/cm2) germ stub the amount is obviously more, its appearance more didn''t add electric current to have to grow but the surface is rougher. The surface of the in addition electric current 20 mA germ stub is obviously rough and slightly has the type of cave convex gravamen, make the path of the cell membrane hole just a little enlarged and make proton inside the cell and the electronics that cathode provide knotted.