文章研究了柠檬酸添加量对牛粪中温(35±1℃)厌氧发酵产沼气的日产气量、累积产气量、p H值以及COD降解率等的影响。结果表明:添加适量的柠檬酸对牛粪厌氧发酵产沼气具有显著的促进作用,0.6%的柠檬酸添加量取得了最高日产气量38.46 ...文章研究了柠檬酸添加量对牛粪中温(35±1℃)厌氧发酵产沼气的日产气量、累积产气量、p H值以及COD降解率等的影响。结果表明:添加适量的柠檬酸对牛粪厌氧发酵产沼气具有显著的促进作用,0.6%的柠檬酸添加量取得了最高日产气量38.46 m L/g(VS);0.7%的柠檬酸添加量取得了最高累积产气量545.48 m L/g(VS);0.3%的柠檬酸添加量可以大幅提高COD去除率,达到了34.5%;随着柠檬酸添加量的增加,第二次产气高峰依次推迟,p H值从6.76逐渐降低到5.41,当柠檬酸添加量为0.9%时,p H值达到5.57。该研究结果为牛粪厌氧发酵规模化沼气工程的高效运行提供了技术参考。展开更多
Oil was extracted from seeds of Jatropha Curcas,in high yields(up to 40% by weight).The extracted Jatropha oil was converted in a laboratory reactor to biodiesel by transesterification.Analysis of Jatropha oil and Jat...Oil was extracted from seeds of Jatropha Curcas,in high yields(up to 40% by weight).The extracted Jatropha oil was converted in a laboratory reactor to biodiesel by transesterification.Analysis of Jatropha oil and Jatropha biodiesel by GC/MS and GC/SIMDIS showed that Jatropha oil could be readily converted to a biodiesel product through NaOH catalyzed transesterification.The resulting biodiesel has desirable properties such as high cetane number and low flash point,which are major improvements over the properties of commercial biodiesel fuels.展开更多
文摘文章研究了柠檬酸添加量对牛粪中温(35±1℃)厌氧发酵产沼气的日产气量、累积产气量、p H值以及COD降解率等的影响。结果表明:添加适量的柠檬酸对牛粪厌氧发酵产沼气具有显著的促进作用,0.6%的柠檬酸添加量取得了最高日产气量38.46 m L/g(VS);0.7%的柠檬酸添加量取得了最高累积产气量545.48 m L/g(VS);0.3%的柠檬酸添加量可以大幅提高COD去除率,达到了34.5%;随着柠檬酸添加量的增加,第二次产气高峰依次推迟,p H值从6.76逐渐降低到5.41,当柠檬酸添加量为0.9%时,p H值达到5.57。该研究结果为牛粪厌氧发酵规模化沼气工程的高效运行提供了技术参考。
文摘Oil was extracted from seeds of Jatropha Curcas,in high yields(up to 40% by weight).The extracted Jatropha oil was converted in a laboratory reactor to biodiesel by transesterification.Analysis of Jatropha oil and Jatropha biodiesel by GC/MS and GC/SIMDIS showed that Jatropha oil could be readily converted to a biodiesel product through NaOH catalyzed transesterification.The resulting biodiesel has desirable properties such as high cetane number and low flash point,which are major improvements over the properties of commercial biodiesel fuels.
