| 缺氧-好氧连续流亚硝化颗粒污泥反应器的启动及稳定运行 |
| 摘要点击 2881 全文点击 1158 投稿时间：2018-07-07 修订日期：2018-07-16 |
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| 中文关键词 亚硝化颗粒污泥 缺氧-好氧 亚硝态氮积累率(NAR) 溶解氧(DO) 水力停留时间(HRT) |
| 英文关键词 nitrosation granules anoxic-aerobic nitrite accumulation rate (NAR) dissolved oxygen (DO) hydraulic retention time (HRT) |
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| 中文摘要 |
| 在室温下（17~19℃），通过接种成熟的亚硝化颗粒污泥于缺氧-好氧连续流反应器中，研究连续流亚硝化颗粒污泥的启动及稳定运行.结果表明，在启动阶段，颗粒污泥系统的亚硝态氮积累率（NAR）平均超过95%，成功启动了缺氧-好氧连续流亚硝化颗粒污泥系统.将好氧区溶解氧（DO）由（3±0.2）mg·L-1提高到（4.5±0.2）mg·L-1，探究DO对于该连续流系统的影响.结果表明，在较高DO下，缺氧-好氧连续流亚硝化颗粒污泥系统仍能保持良好的亚硝化性能，平均NAR大于95%.另外，通过改变进水的水力停留时间（HRT），探究HRT对于该连续流系统的影响.较短的水力停留时间（8.4 h）会加快污泥颗粒在系统中的循环，使破碎的颗粒污泥不能及时重组，致使污泥颗粒沉淀性变差，造成污泥颗粒的流失.HRT增加到12.2 h时，颗粒污泥系统得到了恢复，并且可以稳定运行.在运行末（166 d），氨氮去除率和NAR分别为86.7%和96.2%. |
| 英文摘要 |
| Matured nitrosation granules were inoculated to an anoxic-aerobic continuous-flow reactor at room temperature (17-19℃). The startup and stabilization of nitrosation with granules were studied. The results show that the nitrosation of the continuous-flow was successfully achieved with an average nitrite accumulation rate (NAR) above 95%. With the increase of the dissolved oxygen (DO) content from (3±0.2) to (4.5±0.2) mg·L-1 in the aerobic zone, the NAR remained above 95%. The effect of the hydraulic retention time (HRT) of the continuous-flow reactor was investigated. The short HRT (8.4 h) sped up the circulation of the sludge particles in the continuous-flow system such that the broken granular sludge could not be integrated in time, resulting in the deterioration of granular sludge settling and the loss of sludge granules. The performance of the system was restored with the increase of the HRT to 12.2 h and the continuous-flow system stabilized. The ammonia removal efficiency and NAR were 86.7% and 96.2% on day 166, respectively. |
