为了引进和推广GET(Methane gas as renewable energy at rice fields tian)技术,并有效改善土壤肥力,开展了基于GET技术的农家肥和水稻秸秆混合厌氧发酵,生产生物甲烷的田间试验。通过对利用和未利用该技术的土壤全氮、全磷、有机质含...为了引进和推广GET(Methane gas as renewable energy at rice fields tian)技术,并有效改善土壤肥力,开展了基于GET技术的农家肥和水稻秸秆混合厌氧发酵,生产生物甲烷的田间试验。通过对利用和未利用该技术的土壤全氮、全磷、有机质含量的测定,探讨了试验过程中农家肥类型(猪粪和牛粪)、水稻秸秆施用量2个试验因子及其交互作用对土壤肥力的影响。试验结果表明,农家肥类型、水稻秸秆施用量及其交互作用均对土壤肥力产生了一定影响。农家肥类型对土壤有机质含量有极显著影响,其中,以猪粪+水稻秸秆处理对土壤有机质含量的促进效果较好,其土壤有机质含量比牛粪+水稻秸秆、水稻秸秆处理分别提高7.67%、29.86%,水稻秸秆处理土壤全氮、全磷含量相比对照分别增加35.72%、 59.97%。水稻秸秆施用量对土壤有机质、全磷含量分别有极显著、显著影响,不同施用量的水稻秸秆使土壤全氮、全磷、有机质含量最高分别增加24.70%、71.12%、156.15%,但水稻秸秆施用量超过100 kg/垄以后,土壤有机质含量的增加不再显著。2种农家肥+水稻秸秆配比中,均以农家肥∶水稻秸秆(质量比)=120∶125对土壤的增肥效果较好。展开更多
The present work dealt with the generation, purifying and liquefaction of biomethane to improve energy density using local materials for domestic applications. Cow dung was sourced at JKUAT dairy farm and experiments ...The present work dealt with the generation, purifying and liquefaction of biomethane to improve energy density using local materials for domestic applications. Cow dung was sourced at JKUAT dairy farm and experiments were conducted at JKUAT Bioenergy laboratory using biogas generated in laboratory scale 1 m<sup>3</sup> bioreactors. Experiments were done in triplicates and repeated under different conditions to get the optimal conditions. The results showed that enhanced cow dung substrate displayed an improved fermentation process with increased biogas yields. Purified biogas optimized methane content from 56% ± 0.18% for raw biogas to 95% ± 0.98% for biomethane which was ideal for liquefaction.展开更多
Bio-methane,as a promising renewable green energy,the component and thermal value of which are very close to that of natural gas,indicates an enormous resource potential and could be employed as the alternative of fos...Bio-methane,as a promising renewable green energy,the component and thermal value of which are very close to that of natural gas,indicates an enormous resource potential and could be employed as the alternative of fossil energy through the development of agro-industrial integration and efficient bio-methane system. Establishment of high efficient agro-industrial integrated bio-methane system is an important component of the renewable energy system and also a significant way of emission reduction.展开更多
沼气作为一种典型的生物质能源通过提纯可制得生物甲烷(BNG),低温提纯作为一种制取生物甲烷的技术目前仍处于实验室阶段,并没有任何工程应用。从原理出发,提出了沼气进行低温提纯的两种方式,即气液分离与气固分离。通过对相图的研究与...沼气作为一种典型的生物质能源通过提纯可制得生物甲烷(BNG),低温提纯作为一种制取生物甲烷的技术目前仍处于实验室阶段,并没有任何工程应用。从原理出发,提出了沼气进行低温提纯的两种方式,即气液分离与气固分离。通过对相图的研究与沼气热力学参数的计算得出结论。结果表明:气液分离难以保证CH4含量,可行性较差,气固分离模式可达到分离目的,可行性较强。随后从能耗的角度对低温提纯进行分析。计算结果表明,BNG纯度要达到车用天然气要求(CH4含量95%)时,低温分离所消耗的冷能约为77.2 k W。通过合理设计工艺可有效降低其能耗。展开更多
文摘为了引进和推广GET(Methane gas as renewable energy at rice fields tian)技术,并有效改善土壤肥力,开展了基于GET技术的农家肥和水稻秸秆混合厌氧发酵,生产生物甲烷的田间试验。通过对利用和未利用该技术的土壤全氮、全磷、有机质含量的测定,探讨了试验过程中农家肥类型(猪粪和牛粪)、水稻秸秆施用量2个试验因子及其交互作用对土壤肥力的影响。试验结果表明,农家肥类型、水稻秸秆施用量及其交互作用均对土壤肥力产生了一定影响。农家肥类型对土壤有机质含量有极显著影响,其中,以猪粪+水稻秸秆处理对土壤有机质含量的促进效果较好,其土壤有机质含量比牛粪+水稻秸秆、水稻秸秆处理分别提高7.67%、29.86%,水稻秸秆处理土壤全氮、全磷含量相比对照分别增加35.72%、 59.97%。水稻秸秆施用量对土壤有机质、全磷含量分别有极显著、显著影响,不同施用量的水稻秸秆使土壤全氮、全磷、有机质含量最高分别增加24.70%、71.12%、156.15%,但水稻秸秆施用量超过100 kg/垄以后,土壤有机质含量的增加不再显著。2种农家肥+水稻秸秆配比中,均以农家肥∶水稻秸秆(质量比)=120∶125对土壤的增肥效果较好。
文摘The present work dealt with the generation, purifying and liquefaction of biomethane to improve energy density using local materials for domestic applications. Cow dung was sourced at JKUAT dairy farm and experiments were conducted at JKUAT Bioenergy laboratory using biogas generated in laboratory scale 1 m<sup>3</sup> bioreactors. Experiments were done in triplicates and repeated under different conditions to get the optimal conditions. The results showed that enhanced cow dung substrate displayed an improved fermentation process with increased biogas yields. Purified biogas optimized methane content from 56% ± 0.18% for raw biogas to 95% ± 0.98% for biomethane which was ideal for liquefaction.
文摘Bio-methane,as a promising renewable green energy,the component and thermal value of which are very close to that of natural gas,indicates an enormous resource potential and could be employed as the alternative of fossil energy through the development of agro-industrial integration and efficient bio-methane system. Establishment of high efficient agro-industrial integrated bio-methane system is an important component of the renewable energy system and also a significant way of emission reduction.
文摘沼气作为一种典型的生物质能源通过提纯可制得生物甲烷(BNG),低温提纯作为一种制取生物甲烷的技术目前仍处于实验室阶段,并没有任何工程应用。从原理出发,提出了沼气进行低温提纯的两种方式,即气液分离与气固分离。通过对相图的研究与沼气热力学参数的计算得出结论。结果表明:气液分离难以保证CH4含量,可行性较差,气固分离模式可达到分离目的,可行性较强。随后从能耗的角度对低温提纯进行分析。计算结果表明,BNG纯度要达到车用天然气要求(CH4含量95%)时,低温分离所消耗的冷能约为77.2 k W。通过合理设计工艺可有效降低其能耗。
