氨氮对餐厨垃圾厌氧发酵产氢的影响  

THE INFLUENCE OF AMMONIA ON BIO-HYDROGEN PRODUCTION FROM FOOD WASTE

作　　者：曹先艳[1] 赵由才[1] 袁玉玉[1] 牛冬杰[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《太阳能学报》2008年第6期751-755,共5页Acta Energiae Solaris Sinica

基　　金：国家科技部攻关项目(No.05dz05818);上海市科学技术委员会科研计划项目(No.06dz12006)

摘　　要：研究了以尿素作为氮源时对餐厨垃圾厌氧发酵产氢的影响。研究结果表明,随着尿素添加量的增大,体系中氨氮的浓度逐渐增大,当氨氮浓度在3.58～7.89g/L的范围内,对氢气的产生有促进作用;氨氮浓度超过7.89 g/L时,体系的氢气产量开始下降,氨氮浓度为6.24 g/L时得到最大氢气产率(126.8 mL/g VS);然而,当氨氮浓度超过5.93g/L时,体系反应的延迟时间超过了13.64 h,因此综合考虑氢气产量和产氢效率,应该控制反应过程中氨氮的浓度低于6 g/L。反应后,液相中的主要产物是乙酸和丁酸,随着尿素投加量的增大,体系中丁酸的浓度逐渐减少,乙酸的浓度增大,但两者的浓度和所占总有机酸的比例都约为80%,没有明显变化;丙酸和戊酸含量较少,且变化不大。The influence of urea as nitrogen resource on the bio-hydrogen production from food waste was investigated in the paper. The hydrogen yield increased with the ammonia concentration at 3.58 - 7.89 g/L and decreased at the concentration over 7.89 g/L, the maximum yield 126.8 mL/g VS was obtained at 6.24 g/L. But considering both the yield and the efficiency, the ammonia concentration should be controlled under 6 g/L for the lag time exceeds 13.64 h at 5.93 g/L. The acetic acid and butyric acid is primary by-product in the liquid phase, and acetic acid increased with ammonia concentration and butyric acid decreased but the total concentration kept almost stable, the concentration of propionic acid and pentonic acid is a little.

关 键 词：餐厨垃圾 厌氧发酵 产氢 氨氮 影响 

分 类 号：TK511.4[动力工程及工程热物理—热能工程]