摘要
利用白腐菌、木霉菌以及白腐菌和木霉菌复合菌在相同的条件下对玉米秸秆进行预处理,对预处理后的秸秆进行厌氧发酵制取沼气。结果表明,利用微生物进行秸秆预处理能促进秸秆厌氧发酵产沼气的进程,提高产气量和产气效率,其中以混合菌预处理效果最好,产气量比未经预处理秸秆的产气量提高11.95%、产气时间提前6 d、产气高峰期提前16 d,容积产气率达到1.196 mL/(mL.d),原料产气率达到518.33 mL/g。仅利用白腐菌进行秸秆预处理也具有良好的效果,而利用木霉进行秸秆预处理对厌氧发酵的促进作用效果较差。说明利用木质素降解菌株进行秸秆预处理对提高秸秆的厌氧发酵效率具有重要的作用。
The straw contains a high content of lignin, which cannot be well utilized by anaerobic bacteria in anaerobic digestion process. This paper presents the experimental study of the straw pretreatment with microorganism, which aims to enhance its anaerobic digestion. The straw is pretreated by different fungi including white-rot fungi, Trichoderma and the compound fungi of whiterot fungi and Trichoderma. The pre-treating effects are expressed by biogas production, biogas production time, peak time of biogas production. The results show that compound fungus is the most effective pre-treatment method among the three different fungi. Compared with CK, the pre-treatment with compound fungus can increase the biogas production by 11.95% , advance biogas production time and peak time of biogas production by 6 days and 16 days respectively. The effect of white-rot fungi pre-treatment is also significant. Howerver, using Trichoderma pre-treatment straw doesn＇t gain good results. The results show that using strains of lignin degradation to pre-treat straw can enhance the rate of anaerobic fermentation.
出处
《可再生能源》
CAS
北大核心
2013年第5期80-83,共4页
Renewable Energy Resources
基金
河北省重大技术创新项目(10226718Z)
关键词
白腐菌
木霉
生物预处理
厌氧发酵
white-rot fungi
trichoderma
biological pretreatment
anaerobic fermentation
