氨氮抑制对于餐厨垃圾厌氧发酵的影响研究.doc

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 学生姓名王晓平指导教师赵明星副教授二〇一二年六月摘要 I 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,,. 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)) 氨氮胁迫对餐厨垃圾厌氧发酵过程中 TOC )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产甲烷辅酶 F 420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对产甲烷的抑制作用,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 F . 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[具体产气数据].2)当氨氮浓度大于 4500mg /L时,对于 TOC 的去除率影响较大,去除率较 0mg /L的降低 30% .3)不同的氨氮浓度,不仅影响有机酸的种类,)氨氮胁迫对餐厨垃圾厌氧发酵过程中 pH 的影响不大,pH )随着浓度的增加,F 420呈先增加后减少的趋势变化,当氨氮浓度在 1500mg /L时,F 420的浓度大约为 /L 关键词: 氨氮胁迫;产甲烷菌;有机酸; F 420; TOC 摘要 II ABSTRACT Food waste is rich anic substances such as starch and cellulose, which have strong biodegradability. It has been widely applied that the treatment of food waste using the biological method, and the anaerobic digestion has bec o me 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, us ing anaerobic granular sludge as bacteria inculum in digestion, focused on the following 3 aspects: 1) Ammonia stress on waste food production ;2)A mmonia stress on the TOC removal of food waste anaerobic fermentation process, ;3) Ammonia stress on the influence anic acids in the food waste anaerobic fermentation process and the impact on the anaerobic fermentation process ofa 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 signifi