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Five thermophilic strains that can degrade cellulose were isolated from the compost of a waste management in Guangzhou, China. Since one of them degraded cellulose effectively, it was chosen as the study strain. Based on its morphology, spores‘ susceptibility to heat, cell wall composition and other characteristics, the organism was classified as Thermomonospora fusca. Conditions for production of carboxy methyl cellulase (CMCase) were examined. The optimal temperature and pH value for enzyme production were 50℃ and 10.5, respectively. Cellulosic materials and easily metabolisable carbohydrates served as carbon sources for the growth of the strain. Only cotton, avicel,carboxy methyl cellulose (CMC) acted as potent inducers for the production of cellulases by this strain. Despite excellent growth on easily metabolisable carbohydrates, only constitutive levels of cellulases were produced. The optimal carbon and nitrogen sources for CMCase production were cotton and soybean respectively. The high thermostability, wide pH stability, and cheap nitrogen source show well potential use for composting treatment and commercial detergents. 相似文献
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为考察玉米秸秆与猪粪混合厌氧发酵产沼气特性,以10L的厌氧发酵装置,并用单一玉米秸秆发酵和单一猪粪发酵作为对照,对以玉米秸秆和猪粪混合发酵进行研究.发现玉米秸秆猪粪混合发酵可以加快玉米秸秆产气并可大幅度提高玉米秸秆产气量,试验组最高日产沼气量分别比单一玉米秸秆组、猪粪组提高47.36％和32.22％;实验组的甲烷含量与单一猪粪组相似,高于单一玉米秸秆组;各组的pH均在8.20左右.相关性分析表明,原料中含混合发酵组的pH与日产沼气量间呈极显著性负相关(P＜0.01). 相似文献
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国外城市生活垃圾管理政策及启示 总被引：3，自引：0，他引：3
垃圾是伴随着人类生产、生活而产生的。随着工业化和城市化的推进,城市人民的物质文化生活日益提高,垃圾的产量与成分也迅速增加和变化。在当今世界上处理垃圾的难度越来越大,给城市的发展和管理带来了新的困难,直接或间接地影响着生态环境,对居民的健康和生存构成了严重的威胁。现在一座百万人口的城市一天要产上千吨的垃圾。处理和处置这些垃圾的过程中,不仅要占用大量土地,甚至占用良田,而且会污染空气、土壤和水体,破坏环境景观。所以世界各国特别是发达国家对城市生活垃圾的管理处治制定政策、法规,限制垃圾的产生,减少垃圾的排放量。… 相似文献
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