Mishima D, Tateda M, Ike M, Fujita M
Department of Environmental Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamada-Oka, Suita, Osaka 565-0871, Japan.
Bioresour Technol. 2006 Nov;97(16):2166-72. doi: 10.1016/j.biortech.2005.09.029. Epub 2005 Nov 23.
In this study, enzymatic hydrolysis of two floating aquatic plants which are suitable for water purification, water hyacinth (Eichhornia crassipes) and water lettuce (Pistia stratiotes L.), was performed to produce sugars. Twenty chemical pretreatments were comparatively examined in order to improve the efficiency of enzymatic hydrolysis. As a result, the alkaline/oxidative (A/O) pretreatment, in which sodium hydroxide and hydrogen peroxide were used, was the most effective pretreatment in terms of improving enzymatic hydrolysis of the leaves of water hyacinth and water lettuce. The amount of reducing sugars in enzymatic hydrolysate of water lettuce leaves was 1.8 times higher than that of water hyacinth leaves, therefore water lettuce seems to be more attractive as a biomass resource than water hyacinth. Although roots of these plants contained large amounts of polysaccharides such as cellulose and hemicellulose, they generated less monosaccharides than from leaves, no matter which chemical pretreatment was tested.
在本研究中，对两种适合水质净化的漂浮水生植物凤眼莲（Eichhornia crassipes）和大薸（Pistia stratiotes L.）进行酶解以生产糖类。为提高酶解效率，对20种化学预处理方法进行了比较研究。结果表明，使用氢氧化钠和过氧化氢的碱/氧化（A/O）预处理在提高凤眼莲和大薸叶片酶解效率方面是最有效的预处理方法。大薸叶片酶解产物中还原糖的含量比凤眼莲叶片高1.8倍，因此大薸作为生物质资源似乎比凤眼莲更具吸引力。尽管这些植物的根部含有大量多糖，如纤维素和半纤维素，但无论测试哪种化学预处理方法，根部产生的单糖都比叶片少。
