摘要
为解决因生物质秸秆降解能力差而导致秸秆转化为高品位能源的能量转化率低的问题，提出了生物质秸秆热复合预处理。采用单因素方法研究了常温静置、水浴加热、碱处理和热复合预处理4种方式的光合产氢效果及影响热复合预处理效果的因素。结果表明，热复合预处理的产氢效果最好，其产氢量和还原糖得率最大，其次是碱处理的体系，水浴加热随之，而常温静置预处理的产氢效果最差。对于玉米秸秆热复合预处理光合产氢，碱质量分数、水浴加热时间、秸秆颗粒度对产氢能力有不同程度的影响，其中碱质量分数0.75%-1%、水浴加热4 h、颗粒度80-96 μm和超微粉碎的热复合预处理产氢效果较佳。
The given paper aims to propose an alkali and heat compound pretreatment method of the corn stalk for the photosynthetic hydrogen production in hoping to solve the problem of biomass the straw＇s low conversion capacity caused by the recalcitrance of biomass straw. We have made an exploration of the effect of photosynthetic hydrogen production by using a single factor analysis method to be satisfied with the following four conditions： the normal temperature, the water bath heating, the alkali treatment and the compound pretreatment of alkali and heat. The results of our pretreatment experiments prove that alkali and heat compound pretreatment can bring about the best effects, which is said to be followed by a descending order of the alkali treatment and the water bath heating system, the worst is the treatment at the normal temperature. Technically speaking, the concentration of alkali, water bath heating time and the particle size prove to play their due important functions in the effect of alkali and heat compound pretreatment. What is more, when the corn stalk is ground to a certain extent, it would be necessary to undermine the high-level structure of plant fiber, which can then result in making the macromolecular structure loose and promoting the crystallization transformation. As the particles are getting smaller, the area of the effective reaction tends to be larger, in turn enhancing the conversion of the available materials in the biomass straw into sugar. The most available particle size should be superfinely ground, in a size range of 80-96 μm. The right alkali concentrations are also conducive to promote the metabolism of photosynthetic bacteria in their own realms. If the alkali concentration of 1% is supposed to produce the highest hydrogen rate, it can be followed by that of 0.75%. Nevertheless, while the hydrogen production rate enjoys a small difference between the alkali concentration 1% and 0.75%, the hydrogen production rate with the alkali concentration 2% can be said to be markedly lower
出处
《安全与环境学报》
CAS
CSCD
北大核心
2014年第3期268-271,共4页
Journal of Safety and Environment
基金
国家自然科学基金项目(51376056)
国家高技术研究发展计划(863计划)项目(2012AA051502)
关键词
农业工程
玉米秸秆
热复合预处理
光合产氢
还原糖得率
agricultural engineering
corn stalk
alkali and heat compound pretreatment
photosynthetic hydrogen production
reducing sugar yield
