| 15℃ SBBR短程硝化快速启动和稳定运行性能 |
| 摘要点击 1632 全文点击 439 投稿时间：2018-10-30 修订日期：2018-12-03 |
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| 中文关键词 碳源 溶解氧(DO) 生物膜法 短程硝化 序批式生物膜反应器(SBBR) |
| 英文关键词 carbon source dissolve oxygen (DO) biofilm method partial nitrification sequenced batch biofilm reactor (SBBR) |
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| 中文摘要 |
| 本文通过控制C/N研究了15℃序批式生物膜反应器（SBBR）低氨氮污水短程硝化工艺的快速启动和稳定运行性能.结果表明，启动运行60个周期C/N为1.5时成功快速启动短程硝化，C/N为0和3时快速启动失败；荧光原位杂交和激光共聚焦显微镜联用技术（FISH-CLSM）结果表明，生物膜载体在C/N为1.5时成功富集氨氧化菌（AOB），C/N为0和3时，几乎没有AOB与亚硝酸盐氧化菌（NOB）的存在；启动成功的短程硝化在运行过程中可以不加入碳源，但投加适量的碳源可提升硝化性能，对短程硝化的稳定运行更有利.本实验在高溶解氧（DO）（约9mg·L-1）下成功启动短程硝化，稳定运行过程中平均DO维持为6.5mg·L-1左右，成功将实现短程硝化的DO值从低浓度解离出来.反应器内充足甚至过量的NH4+-N可以有效抑制NOB的生长，保证短程硝化的稳定运行.15℃工况下，全量亚硝化工艺更适合处理高氨氮负荷的污水，而半量亚硝化更适合降解低氨氮污水. |
| 英文摘要 |
| In this study, controlled C/N effects on fast start-up and stable performance of partial nitrification process at 15℃ in a Sequenced Batch Biofilm Reactor (SBBR) were investigated. The results showed that partial nitrification successfully fast initiated when C/N was 1.5 but failed when C/N was 0/3 during 60 cycles. Fluorescence in situ hybridization and confocal laser scanning microscope (FISH-CLSM) results showed that ammonia oxidizing bacteria (AOB) was found as the dominant bacteria population when C/N was 1.5. When C/N were 0/3, there were almost no existence of AOB and nitrite oxidative bacteria (NOB). Partial nitrification could be stably achieved without carbon source. However, the addition of an appropriate amount of carbon can effectively improve the nitrification performance, and it is better for the stable operation of partial nitrification. In this experiment, partial nitrification was successfully initiated at high dissolved oxygen (DO) (about 9 mg·L-1) conditions. The average DO was maintained at about 6.5 mg·L-1 during the stable operation, which successfully decoupled partial nitrification from low DO concentration. Excessive residual ammonium concentration in the reactors effectively repressed the growth of NOB and guaranteed the stable operation of partial nitrification. At 15℃, full nitritation was more suitable for sidestream wastewater, while mainstream wastewater was more suitable for partial nitritation. |
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