【摘要】 为评估木质纤维类农林加工废弃物直接作为沼气发酵原料的可行性,采用批次试验,选取其中产量大、分布广的甘蔗渣、棉籽壳、花生壳和木屑4种原料,在中温(37℃)条件下进行厌氧发酵产甲烷潜力(BMP)试验。结果表明:甘蔗渣、棉籽壳、花生壳及木屑4种农林加工废弃物的VS累积甲烷产量(m L/g)分别为205.67,180.30,35.09及4.52,产气高峰期主要集中在厌氧发酵的前26 d;供试原料的产甲烷潜力与其半纤维素、纤维素含量均呈极显著正相关(P<0.01),与木质素含量呈显著负相关(P<0.05)。木质素的存在显著降低了木质纤维类农林加工废弃物的产甲烷潜力。甘蔗渣、棉籽壳具有较高的产甲烷潜力,可直接作为沼气发酵原料;而花生壳、木屑则需进行有效的预处理才可应用到沼气发酵中。更多还原

【Abstract】 In order to assess feasibility of lignocellulosic agriculture and forestry processing wastes: bagasse,cotton seed hull,peanut hull and sawdust served as anaerobic digestion substrates directly,batch tests were used to analysis biochemical methane potential(BMP) at 37 ℃.The results showed that: accumulative methane production(m L/g VS) were 205.67,180.30,35.09 and 4.52,respectively. BMP was extremely significant positively correlated with hemicellulose and cellulose content(P<0.01), while significant negtively correlated with lignin content(P<0.05). In a word,bagasse and cotton seed hull had relatively high biochemical mathane potential,they can be used as anaerobic digestion substrate directly;while peanut hull and sawdust need more effective pretreatment.更多还原