玉米秸秆发酵产氢研究

Influence factors of hydrogen production in corn stalks fermentation

传统能源储量日益减少以及能源需求的不断增长使21世纪的能源问题面临巨大的挑战,人们越来越认识到可再生能源的巨大潜力和发展前景。利用农业固体废弃物和污泥联合厌氧发酵制氢,既可解决农业废物和污泥的环境污染问题,又可制备清洁的燃料能源,因此具有非常重要的研究价值。以厌氧活性污泥为接种物,以玉米秸秆为发酵底物进行发酵产氢实验,研究了不同秸秆粒径、预处理方法、发酵液pH值和金属离子对玉米秸秆发酵产氢速率以及产氢气量的影响。结果表明:玉米秸秆粒径越小越利于发酵产氢;经过H2SO4预处理后,玉米秸秆单位总产氢量大于经NaOH预处理样品;pH值为6左右可以提高玉米秸秆的发酵产氢气速率;Fe2+和Mg2+对发酵产氢效果有一定的影响。

With traditional fuel energy decreased and the environment problem deteriorated,the great potential and prospect of renewable energy has been recently realized.Hydrogen production from agricultural solid wastes and sewage sludge by anaerobic fermentation can solve the environment pollution not only,but also produce clean energy which is friend for environment.It is necessary to study on hydrogen production from food waste and sewage sludge by anaerobic fermentation.Bio-hydrogen production from corn stalks by anaerobic fermentation of digested sludge was studied in this paper.The influence of the main parameters such as particle size,pretreatment method,pH value and metallic ion on the corn stalks fermentation was investigated.The results show that corn stalks with small particle size were in favor for fermentative bio-hydrogen production.The total volume hydrogen production of the corn stalks with H2SO4 pretreatment was larger than that with NaOH pretreatment.The pH around 6 increased hydrogen production velocity.Fe2＋ and Mg2＋ have certain effect on hydrogen production.