人工湿地植物生物质资源能源化利用潜力评估

Assessment of Constructed Wetland Plant Biomass for Energy Utilization

通过测定不同人工湿地植物的纤维素组分和热值,并采用NaOH–酶解工艺研究不同人工湿地植物水解液组分,对在人工湿地技术体系中起重要作用的湿地植物能源化利用潜力进行系统评估.结果显示,15种人工湿地植物的纤维素含量在19.78%～36.9%之间,半纤维素含量在4.51%～19.67%之间,木质素含量在10.79%～20.47%之间,具有与玉米秸秆相当的热值,其热值在14.002～17.839 MJ/kg之间.在NaOH–酶解工艺条件下,不同人工湿地植物水解液中存在5种糖类组分,主要为葡萄糖和木糖.研究表明,人工湿地植物是一种较好的生物质资源,可通过生物质固体成型燃料技术、沼气技术和燃料乙醇技术加以利用,进而建立人工湿地植物生物质资源能源化藕联利用模式.

Different constructed wetland plants were systematically assessed for energy utilization by measuring their cellulosic contents, caloricvalues and hydrolyzate of NaOH-cellulase pretreatment. The results showed that the cellulose, hemicellulose and lignin contents of the fifteen different constructed wetland plants were 19.78% to 36.9%, 4.51% to 19.67% and 10.79% to 20.47%, respectively. All wetland plants used in this study showed the same thermal value （ranged from 14.002 to 17.839 MJ/kg） as corn stover. Among the five types of sugar existed in the hydrolyzate, glucose and xylose were the main components. The results indicated that the constructed wetland plant could be used as one of suitable raw material resources for biomass briquette fuel, biogas and bioethanol production, and the coupled mode of constructed wetland plant biomass and bioenergy also could be constructed in the future. Fig 2, Tab 2, Ref22