【作者】 阮渊；

【导师】 肖波；

【作者基本信息】 华中科技大学 ， 环境工程， 2006， 硕士

【摘要】 随着农林业和畜禽养殖业的发展,我国生物质垃圾日益增多造成了严重的环境污染,而能源日益匮乏,影响了经济发展。若将生物质垃圾能源化,这不仅可以减少生物质垃圾对环境的污染,还可以为经济建设提供一定的能源。本论文提出暗河式生物质垃圾流态化厌氧发酵技术,将厌氧发酵技术和生活污水处理技术结合起来处理垃圾,使垃圾在可减少土地占用的卧式反应器中,在流动过程中完成厌氧发酵反应,从而实现生物质垃圾处理的连续化和动态化。本论文研究了各因素对垃圾厌氧发酵的影响,并运用四因素三水平正交实验设计的方法,研究了温度为35℃,pH值为6.7~7.25,间歇式搅拌条件下,各因素对垃圾厌氧发酵产沼效率的影响。通过对实验结果分析,得出垃圾厌氧发酵产沼的最佳工艺条件:垃圾粒径0.4mm ,总固体含量10%,C/N比值20,接种物量20%。最后,在最佳工艺条件下,通过暗河式生物质垃圾流态化厌氧发酵系统进行了中试研究。研究小型暗河式沼气池以猪粪和青草为发酵原料,在适当pH值、总固体含量、垃圾粒径、接种物量和碳氮比的条件下,沼气产量和单位池容产气率与温度之间的关系。该试验为暗河式生物质垃圾流态化厌氧发酵技术在工程上实现提供了更进一步的技术支持,为实现垃圾处理和生活污水处理的一体化提供了进一步的理论基础。采用暗河式生物质垃圾流态化厌氧发酵技术处理生物质垃圾有利于降低生物质垃圾处理成本,实现生物质垃圾厌氧产沼连续化、自动化和工业化,对于生物质垃圾能源化处理具有重大意义和广阔的应用前景。更多还原

【Abstract】 With the development of agriculture and breed aquatics domestic animals , the biomass wastes is rapidly increasing in China and severity pollute the environment while the energy sources is quickly decreasing. By the way of energy recovery of biomass wastes, not only can we reduce influence of biomass wastes on the environment, but also save and create energy sources.In this paper, the author researches a novel pathway–“UR”anaerobic digestion technology of fluidized biomass wastes, which combines the anaerobic digestion and sewerage disposal - to dispose biomass wastes in the process of flow, anaerobic digestion was completed and continuity and dynamic of biomass wastes disposal were realized.The effects of many factors on the anaerobic digestion from municipal solid waste are studied. Furthermore, as the condition of proper PH value and agitation, the effects of particle diameter, total solid (TS), C/N and inoculation amount on the anaerobic digestion from municipal solid waste are researched by the L9(34) orthogonal design experiment .The optimum technology of anaerobic digestion is found out by orthogonal test analysis with the value: particle diameter 0.4 mm , TS 10% , C/N 20, inoculation amount 20%. Finally, through middling-scale test under the condition of the optimum technology of anaerobic digestion. The study regarded pig excrement and green grass as fermented raw materials, under the condition of proper pH value , total solid content, particle diameter , inoculation amount and C/N to find out the relationship between the methane yield and temperature and methane generation rate . This makes it possible that UR anaerobic digestion technology of fluidized biomass wastes is realized in engineering.Biomass wastes disposal by“UR”anaerobic digestion technology of fluidized biomass wastes is beneficial to realized continuity, automation and industrialization. Furthermore, the technology with wide applied perspective is of great significance for energy recovery of biomass wastes.更多还原