单级自养脱氮工艺亚硝化段试验研究.pdf

重庆大学硕士论文中文摘要

摘要

由于传统生物脱氮工艺反硝化过程需要有机碳源作为电子供体因此在处理
低 C/N 比废水其面临的主要问题就是有机碳源不足为克服这一限制性因素却导
致能耗大运行费用高等弊端难以适应污水处理技术可持续性发展的普遍要求
单级自养脱氮技术就是在不外加有机碳源且在一个反应器内实现脱氮的积极探
索该工艺具有简易高效低能耗的显著优点本论文是在中低氨氮浓度的人
工配水中进行的单级自养脱氮工艺试验研究以掌握该工艺适宜的运行控制条件
和初步探讨了自养脱氮可能的机理
在四组生物膜 SBR 反应器内以普通好氧活性污泥和厌氧污泥为接种污泥进
行单级自养脱氮工艺运行控制条件的对比试验研究结果表明在水温 30 2 时
进水氨氮浓度 80 120mg/l DO 为 HRT 为 1d 和 FA 为
的条件为系统最优控制条件运行 125d 左右可实现稳定的亚硝化亚硝化积累率
平均为 % 系统运行至 180d 后系统脱氮率达到约 40% 污泥负荷为
+
-N/kgMLSS·d
微生物镜检显示系统内异养菌被淘汰而自养型细菌开始富集的污泥特征为出
现杆状絮体稳定的亚硝化系统建立并具有一定自养脱氮功能时期的污泥典型特
征为花瓣状絮体此时通过菌种分离鉴别试验发现亚硝酸菌与硝酸菌数量比高达
相对原始接种污泥中亚硝酸菌数量而言增殖了 155 倍
从自养脱氮工艺运行和微生物菌种分离试验推测单级自养脱氮工艺很可能为
亚硝化和厌氧氨氧化工艺的组合

关键词单级自养脱氮亚硝化 SBR 中低氨氮废水生物脱氮

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重庆大学硕士论文英文摘要

ABSTRACT
Traditional biological nitrogen removal process utilzes anic carbon as
electron donor in the denitrification phase, which is not favor to treat the low C/N
wastewater for the shortage anic carbon. The methods, such as delivering
methanol, which may bring to much energy waste and high operation cost etc in
practice. All this is much far away from the sustaining-development aim of wastewater
technologies. One-step autotrophic nitrogen removal process, which means the
experiment is carried out in one reactor and no anic carbon is affixed, has the
advantages of facility, high efficiency and low energy requirement. In this dissertation
the experiment on treatment of mid-low ammonia concentration synthetic wastewater
was carried out to get the optimized operation conditions and explore the possible
mechanism of one-step autotrophic nitrogen removal process.
The experiment was carried out in four SBR reactors pare to get the best
operation condition of one-step autotrophic nitrogen removal process, and used ordinary
aerobic sludge and anaerobic sludge as the inoculation sludge and the synthetic mid-low
ammonia concentration wastewater as nitrogen resource. The results showed that on the