螺旋藻光合微生物燃料电池产电性能的研究

Studies on the Power Production of Microalgae Photosynthetic Microbial Fuel Cell of Spirulina

将微藻与微生物燃料电池(简称MFC)相结合,可以将太阳能转化成电能,这是一种可再生、稳定、高效的产能方式。本论文主要研究了螺旋藻作为MFC阳极产电微生物,以碳酸氢盐或葡萄糖作为底物的产电性能,并通过改变光照强度等条件,探讨影响微藻MFC产电性能的主要因素。以0.1mol/L的铁氰化钾溶液作为阴极液,外电阻为1000Ω,光照强度为12000lx,温度为28℃或30℃,进行电池的运行。螺旋藻MFC可以得到200mV的稳定输出电压,最大功率密度为41.33mW/m2,内阻为2000Ω。研究发现,螺旋藻MFC产生的电压主要依赖于生物膜上的藻,而与悬浮在阳极液中的藻无关。光照强度是影响产电的最主要因素之一,藻的输出电压随着光暗周期的变化表现出明显的周期性。

The combination of microalgae and microbial fuel cell （MFC） can change solar energy into electrical energy, and it is a renewable, stable and efficient production methods. In this thesis, Spirulina were produced as the MFC anode power microbes, using bicarbonate or glucose as substrate. And by changing the conditions like light intensity to explore the major factor that impact the micro - electrical properties of algae MFC. Using O. lmol/L of potassium ferricyanide solution as the cathode solution, external resistance 10001Ω, light intensity was 12000lx, the temperature were 28 ℃ or 30 ℃. Spirulina MFC can get 200mV stable output voltage, maximum power density were 41.33mW/m2, resistance were 2000Ω . Study found that the load voltage depends mainly on the biofilm, and had nothing to do with the suspension of algae in the anode solution. The light intensity is the most important factor affecting production of electricity. The output voltage showed significant periodicity with the light and dark cycle.