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菌糠与不同种类原料混合对厌氧发酵产气性能的影响

Effect of Mixing Mushroom Bran with Different Kinds of Raw Materials on Gas Production Performance of Anaerobic Fermentation

  • 摘要: 为提高菌糠和畜禽粪便的利用率,研究了菌糠与不同原料混合厌氧发酵产气效率。即将菌糠与鸡粪、牛粪、鸭粪混合作为发酵原料,通过厌氧发酵试验装置进行厌氧发酵产气试验。结果表明,从产沼气量方面看,菌糠与鸡粪、牛粪、鸭粪混合平均日产气量分别为279.291 L/(kg·d)、282.696 L/(kg·d)、342.76 L/(kg·d),菌糠与鸭粪混合发酵产气效率分别比与鸡粪、牛粪提高了22.7%、21.25%,最优产气组合为菌糠与鸭粪;从甲烷浓度方面看,菌糠与鸡粪、牛粪、鸭粪混合平均日产甲烷的体积分数分别为56.8%、62.54%、60.38%,最优产甲烷组合为菌糠与牛粪。

     

    Abstract: To provide scientific basis for improving the effective utilization of bacterial chaff and livestock manure resources, the efficiency of anaerobic fermentation of bacterial chaff mixed with different raw materials was studied. The anaerobic fermentation gas production test was carried out through the anaerobic fermentation test device using the mixture of bacterial bran, chicken dung, cow dung and duck dung as fermentation raw materials. The results showed that from the analysis of biogas production, the average daily gas production of the mixture of mushroom bran and chicken manure, cow manure and duck manure was 279.291 L/(kg·d), 282.696L/(kg·d) and 342.76 L/(kg·d), respectively. The biogas production efficiency of the mixture of mushroom bran and duck manure was22.7% and 21.25% higher than that of chicken manure and cow manure respectively; According to the analysis of methane concentration, the average daily methane production of the mixture of mushroom bran and chicken dung, cow dung and duck dung is 56.8%,62.54% and 60.38%, respectively. The best methanogenic combination is mushroom bran and cow dung.

     

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