化学生物联用技术对稻秆腐熟的影响及红外光谱研究

Studies on Effects of Combined Chemo-Biological Technique on Rice Straw Decomposition and Its IR Characteristics

采用化学生物联用技术对稻田稻秆进行快速腐熟处理.结果表明,稻秆经化学生物联用技术处理7d,腐熟效果明显,稻秆呈深黑色,容易拉断,腐熟味浓,且水体颜色发黑.利用傅立叶变换红外光谱(FTIR)分析表明:稻秆中的酚羟基、醇羟基和甲基的含量增加,脂肪族化合物部分降解,有机态N变成无机态NH+4的过程明显,聚合态Si进行了转化,生成无定形SiO2,同时氧化缩合作用增强,芳构化成分增多.腐熟稻秆的结构性变化表明化学生物联用处理技术加速了稻秆的腐殖化进程.

Decomposition of rice straw was studied by applyinga combined chemiobiological technique. The results showed that the treated rice straw turned deeply black, was easily drawn apart and gave out strong odor. The water submerging the treated rice straw became black too. The treated rice straw was studied with FTIR technique. The results indicated that there was an increase in the contents of phenylic and alcohol hydroxy and methyl radicals. The fatty group compounds were partly decomposed. Carboxylic acid lipid compounds and ketone compounds were hydrolyzed. There was an obvious process of organic nitrogen being changed into inorganic nitrogen in the form of ammonium ion. Available silicon existing in amorphous form was obtained from the decomposition of polymeric silicon and even brought into accumulation. Oxidation and condensation of the organic compounds were intensified and the contents of aryl compoonds inereased. The structural variation of the treated rice straw showed that the decomposition of rice straw was accelerated by the combined chemobiological technique.