氨氮抑制对于餐厨垃圾厌氧发酵的影响研究（包含对餐厨产气量的影响等内容）.docVIP

编号 本科生毕业设计（论文） 题目：氨氮抑制对于餐厨垃圾厌氧发酵的影响研究 环境与土木工程 学院 环境工程 专业 学 号 1003080221 学生姓名 指导教师 ***年六月 摘 要 餐厨垃圾中富含大量的淀粉和纤维素等有机物质生物可降解性强因此生物方法已经逐渐成为处理厨余物的主要发展方向．厌氧发酵作为一种生物处理技术存在着生化抑制．本课题主要研究氨氮胁迫对产甲烷代谢途径的影响. 本实验以厌氧颗粒污泥为菌种主要研究了以下几个方面的内容：1) 氨氮胁迫对餐厨产气量的影响2) 氨氮胁迫对餐厨垃圾厌氧发酵过程中TOC去除率的影响．3) 氨氮胁迫对餐厨垃圾厌氧发酵过程中有机酸的影响以及对厌氧发酵过程中酶F420的影响． 实验首先通过氨氮负荷梯度实验确定餐厨垃圾厌氧发酵产甲烷的抑制作用以及抑制整个反应过程的有机酸种类和浓度TOC去除率以及产甲烷过程关键酶—辅酶F420．研究氨氮胁迫前后餐厨垃圾厌氧发酵产甲烷代谢途径的变化． 实验结果表明：1) 不同的氨氮浓度对产气量有一定的影响随着氨氮浓度的增加相同反应时间内餐厨垃圾厌氧发酵的产气量依次减少．2)当氨氮浓度大于4500mg时对于TOC的去除率影响较大去除率较0mg的降低30% 3) 不同的氨氮浓度不仅影响有机酸的种类也影响反应水解酸化阶段有机酸的产生速率．4) 氨氮胁迫对餐厨垃圾厌氧发酵过程中pH的影响不大pH大约都在7. 5)随着浓度的增加F420呈先增加后减少的趋势变化当氨氮浓度在1500mg时F420的浓度大约为0.008mmol 关键词：氨氮胁迫；产甲烷菌；有机酸；F420；TOC ABSTRACT Food waste is rich in organic substances such as starch and cellulose, which have strong biodegradability. applied that the treatment of food waste using the biological method, and the anaerobic digestion has become the most promising approach in food waste treatment. The paper investigated the ammonia stress on the metabolic of methane production during anaerobic digestion of food waste for preventing of biochemical inhibition. The study, using anaerobic granular sludge as bacteria inculum in digestion, focused on the following 3 aspects: 1) Ammonia stress on waste food production ; 2) Ammonia stress on the TOC removal of food waste anaerobic fermentation process, ; 3) Ammonia stress on the influence of organic acids in the food waste anaerobic fermentation process and the impact on the anaerobic fermentation process of a special enzyme F420. The main results were as follows: 1) TThe ammonia concentration has some influence on gas production with the increase ofammonia concentration, the same reaction time, anaerobic fermentation of food wastegas production in order to reduce . 2) When the ammonia concentration greater than 4,500 mg /L influenced, for TOC removal, the removal efficiency of 30% was significantly lower than the 0 mg / L. 3) Di