| 摘要: |
| 以经过热处理的厌氧污泥为接种物,将鸡粪废水和米糠废水按不同体积比例混合进行发酵产氢研究,考察碳氮质量比对发酵产氢的影响;并对液相末端产物、COD去除率和产氢动力学进行分析。结果表明:初始pH 5.0、发酵温度为36 ℃时,最佳碳氮质量比为40~50,最大累积生物气产量1.855 L、H2产量1.128 L,最大比产氢速率370.46 mL/( g·d);COD去除率随发酵液碳氮质量比的增大先升高后降低,最大去除率为32.6%,液相末端产物主要转化为乙酸和丁酸等挥发性有机酸;利用Gompertz模型对鸡粪废水和米糠废水产氢过程进行模拟,实验曲线和拟合变化趋势一致,说明Gompertz模型可很好的模拟该产氢过程。 |
| 关键词: 鸡粪废水 米糠 厌氧污泥 生物制氢 碳氮质量比 |
| DOI：10.11841/j.issn.1007-4333.2011.01.013 |
| 投稿时间：2010-07-19 |
| 基金项目:国家高技术研究发展项目(863)计划(2007AA05Z158) |
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| Effect of carbon nitrogen ratio on hydrogen production byanaerobic fermentation from poultry farms wastewater |
|
TIAN Jing-lei1, FENG Ya-li1, LI Hao-ran2, TANG Xin-hua2
|
| (1.Civil and Environmental Engineering School,University of Science and Technology Beijing 100083,China;2.Key State Laboratory of Biochemical Engineering,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China) |
| Abstract: |
| Hydrogen production from poultry farms and rice bran was studied by using heated anaerobic sludge as inoculums of hydrogen-producing bacteria.The effects of the carbon nitrogen ratio of fermentation liquid on hydrogen production,the liquid fermentation products,COD removal rate and hydrogen production kinetics were investigated.The results indicated that poultry dung wastewater could produce hydrogen by anaerobic fermentation and the cumulative gas yield was 1.855 L under the conditions of carbon nitrogen ratio 50,pH 5.0,and temperature 36 ℃.Under above conditions the hydrogen production was 1.128 L,the maximum hydrogen production rate 370.46 mL/(g·d),and the maximum COD removal rate 32.6%.The COD removal rate ascended first and then descended as the carbon nitragen ratio increased.Most of the substrate was transferred into intermediate metabolization products such as acetic acid and butyric acid.A modified Gompertz model can adequately describe the H2 production. |
| Key words: poultry farms wastewater rice bran anaerobic sludge hydrogen production carbon nitrogen ratio |
