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Experimental and numerical study of biogas, methane and carbon dioxide produced by pre-treated wheat straw and pre-digested cow dung

机译:预处理的小麦秸秆和预先消化的牛粪产生的沼气,甲烷和二氧化碳的实验和数值研究

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The biogas constituting majorly CH_4 and CO_2 has been produced by Ca(OH)_2 pre-treated wheat straw with pre-digested cow dung. Some of the key thermodynamic parameters like specific heat capacity, density and heating capacity of the biogas produced have also been calculated per day as well as throughout the hydraulic retention time. The governing equations of biogas with appropriate phase and interfacial conditions describing the physics of the biogas have been derived. The control volume approach has been used to predict the total volume (ml) of biogas, CH_4 and CO_2 throughout the experiment and on the daily basis. The effects of feedstock, temperature and pressure on the production of biogas, CH_4 and CO_2 in anaerobic digestion have also been studied. The average number of molar fraction and conversion ratio of CH_4 and CO_2 are correlated with number of carbon atoms available in feedstock. Numerical calculations by using developed model and Modified Gompertz model have shown proficient agreement with the experimental observations.
机译:Ca(OH)_2预处理的小麦秸秆与预先消化的牛粪一起产生了主要构成CH_4和CO_2的沼气。每天以及在整个水力停留时间内,还计算了一些关键的热力学参数,例如所产生沼气的比热容,密度和热容。推导了具有适当相态和界面条件的沼气控制方程,描述了沼气的物理性质。在整个实验过程中,每天都使用对照量方法来预测沼气,CH_4和CO_2的总体积(ml)。还研究了进料,温度和压力对厌氧消化中沼气,CH_4和CO_2产生的影响。 CH_4和CO_2的平均摩尔分数和转化率与原料中可用的碳原子数相关。通过使用改进的模型和改进的Gompertz模型进行的数值计算显示出与实验结果的充分吻合。

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