水稻秸秆经漆酶预处理后产沼气研究

Research on Biogas Production with Rice Straw Pretreated by Laccase

利用秸秆产沼气是秸秆无害化处理解决环境污染问题的可行手段。本研究针对秸秆特殊结构而导致产沼气少、启动慢、利用率低等问题,采用自培养漆酶预处理水稻秸秆,提高了秸秆产气率及利用率。通过研究发现,当漆酶添加量为40 m L、发酵温度为35℃、预处理7 d的条件下,秸秆的产气量最高;同时发现,金属离子的添加对沼气产量有很大影响,其中Cu2+添加后产气量提高最多。另外,研究发现预处理天数为24 d的秸秆木质素纤维素降解率最高。

Biogas production is a viable method to recycle rice straw harmlessly and solve environmental pollution problems.This paper researched the special structure of straw which leads to the problems of less biogas production,start slow,and low utilization by using self- cultivation laccase to pretreat rice straw to increase gas production rate and utilization. The research shows that biogas production is the highest when laccase dosage is 40 m L,fermentation temperature is 35℃,treatment time of 7d. It is also found that the addition of metal ions,especially Cu2 ＋,have a significant impact on the biogas production. In addition,the study found that 24 days of pretreatment can achieve the highest lignocellulosic degradation rate.