Fe_(3)O_(4)纳米颗粒对玉米秸秆光发酵产氢的影响

EFFECT OF Fe_(3)O_(4)NANOPARTICLES ON PHOTO-FERMENTATIVE BIO-HYDROGEN PRODUCTION FROM CORN STRAW

以HAU-M1光合菌群作为发酵细菌,以玉米秸秆为发酵底物,研究Fe_(3)O_(4)纳米颗粒对光发酵产氢过程的影响。结果表明:粒径60 nm的Fe_(3)O_(4)纳米颗粒浓度为100 mg/L时,比产氢量达到(46.68±1.00)mL/g VSS,与对照组的(35.07±0.56)mL/g VSS相比提升(33.11±0.01)%,此时的能量转化率也提高33.10%。产氢动力学分析结果也表明Fe_(3)O_(4)纳米颗粒对反应体系有明显的影响,粒径60 nm的Fe_(3)O_(4)纳米颗粒浓度为100 mg/L时,最大产氢潜能和最大产氢速率分别为46.97 mL/g VSS和1.06 mL/(g VSS·h)。适宜的Fe_(3)O_(4)纳米颗粒的粒径和浓度能显著促进光发酵产氢能力,而浓度过高则会产生抑制作用。

The effect of Fe_(3)O_(4) nanoparticle addition on photo-fermentative bio-hydrogen production process is investigated.HAU-M1 is taken as photo-fermentation bacteria,and corn straw is used as substrate.When the concentration of Fe_(3)O_(4) nanoparticles with 60 nm particle size is 100 mg/L,the specific hydrogen yield reaches(46.68±1.00)mL/g VSS,which is increased by(33.11±0.01)%compared with the(35.07±0.56)m L/g VSS of the control group.The energy conversion efficiency was also improved by 33.10%.The results of hydrogen production kinetic analysis also showes that Fe_(3)O_(4) nanoparticles have a significant effect on the reaction system.When the concentration of Fe_(3)O_(4) nanoparticles with a particle size of 60 nm is 100 mg/L,the maximum hydrogen production potential and the maximum hydrogen production rate are 46.97 mL/g VSS and 1.06 m L/(gVSS·h),respectively.The suitable particle size and concentration of Fe_(3)O_(4) nanoparticles can significantly promote the hydrogen yield capacity through photo-fermentation pathway,while the high concentration of Fe_(3)O_(4) nanoparticles can inhibit it.The experimental results provide a scientific reference for further improving the theoretical system of photo-fermentative bio-hydrogen production from straw biomass.