养殖场鸡粪废水碳氮质量比对厌氧发酵产氢的影响  

Effect of carbon nitrogen ratio on hydrogen production by anaerobic fermentation from poultry farms wastewater

作　　者：田京雷[1] 冯雅丽[1] 李浩然[2] 唐新华[2] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国科学院过程工程研究所生化工程国家重点实验室,北京100190

出　　处：《中国农业大学学报》2011年第1期79-83,共5页Journal of China Agricultural University

基　　金：国家高技术研究发展项目(863)计划(2007AA05Z158)

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pH5.0、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1.855L、H2产量1.128L,最大比产氢速率370.46mL/(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。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.

关 键 词：鸡粪废水 米糠 厌氧污泥 生物制氢 碳氮质量比 

分 类 号：X382[环境科学与工程—环境工程]