微生物燃料电池表观内阻的构成和测量

将微生物燃料电池内部各种阻力用表观内阻统一表征，在建立其等效电路的基础上将表观内阻分为欧姆内阻和非欧姆内阻2部分.通过稳态放电法测量微生物燃料电池表观内阻，在改变外电阻后稳定时间需要60 s以上方能保证测定准确性，通过稳态放电法测定一室型微生物燃料电池的表观内阻为289 Ω，当外电阻等于表观内阻时微生物燃料电池对外输出功率达到最大，为241 mW/m²；通过电流中断法测量一室型微生物燃料电池的欧姆内阻为99 Ω，测定结果与断电前电流强度无关；当一室型微生物燃料电池对外供电分别处于活化极化区、欧姆极化区和浓差极化区时，非欧姆电阻占总内阻的比例分别为93％、66％和75％，在电池对外供电达到最大时非欧姆占总内阻比例最低.提高微生物燃料电池产电能力需要同时降低电池的欧姆内阻和非欧姆内阻.

Composition and Measurement of the Apparent Internal Resistance in Microbial Fuel Cell

Used a two-stage bench-scale temperature adjustable biofilter, biological treatment of medium and high concentration waste benzene and toluene vapor was investigated. The inlet vapor concentration (c(i)) was 0.9 - 5.0 g/m3. The results show that the biofilter can obtained good performance at 30 - 40 degrees C, and at 32.8 degrees C for benzene and toluene, the maximum elimination capacity (EC) of 136 g/(m3 x h) and 150 g/(m3 x h) is obtained at an inlet loading of 673.5 g/(m3 x h) and 665.0 g/(m3 x h), respectively. High media moisture is adverse to the biofilter performance. The optimum moisture for the biofilter is about 45% and the biofilter can obtain good performance at the moisture ranging from 40% to 50%. With the biofilter operation, pressure drop is increasing from 18 Pa to 39 Pa and leachate is changing from colorless to yellow, and these phenomena show that bioaccumulation is existent.