| CSTR和MBR反应器的短程硝化快速启动 |
| 摘要点击 2166 全文点击 714 投稿时间：2017-01-11 修订日期：2017-03-16 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 短程硝化 完全混合反应器 膜生物反应器 快速启动 间歇曝气 |
| 英文关键词 shortcut nitrification continuous stirred tank reactor (CSTR) membrane bioreactor (MBR) fast start-up intermittent aeration |
| 作者 | 单位 | E-mail | | 张婷 | 苏州科技大学环境科学与工程学院, 苏州 215009 | zt70919@163.com | | 吴鹏 | 苏州科技大学环境科学与工程学院, 苏州 215009
江苏省水处理技术与材料协同创新中心, 苏州 215009
江苏省环境科学与工程重点实验室, 苏州 215009 | | | 沈耀良 | 苏州科技大学环境科学与工程学院, 苏州 215009
江苏省水处理技术与材料协同创新中心, 苏州 215009
江苏省环境科学与工程重点实验室, 苏州 215009 | | | 闾刚 | 苏州科技大学环境科学与工程学院, 苏州 215009 | | | 徐乐中 | 苏州科技大学环境科学与工程学院, 苏州 215009
江苏省水处理技术与材料协同创新中心, 苏州 215009
江苏省环境科学与工程重点实验室, 苏州 215009 | kgre505@163.com | | Samwine Thomas | 苏州科技大学环境科学与工程学院, 苏州 215009 | |
|
| 中文摘要 |
| 为实现短程硝化的快速启动，采用完全混合反应器（CSTR）和膜生物反应器（MBR）进行短程硝化启动性能对比研究，考察两个反应器在启动时间、氮素转化和污泥性能3个方面的差异. 结果表明在进水C/N=1，温度为30℃±1℃，pH为7.5~8.0，DO为0.6~1.0 mg·L-1，结合缺氧/好氧比为1∶3（15 min∶45 min）和缩短HRT，CSTR和MBR分别运行56 d和44 d成功启动短程硝化，MBR启动周期较短. 运行至第14 d、第28 d和第56 d时，CSTR和MBR亚硝累积率平均为51%、66%、89%和50%、71%、93%，硝酸盐氮生成速率（以NO3--N/MLVSS计）依次为7.4、4.0、1.7和7.6、3.5、1.0 mg·（g·h）-1，MBR在第28 d和第56 d表现出较高的亚硝累积率和较低的NO3--N产率，有利于短程硝化的快速启动. 整个运行过程中，两个反应器内的亚硝化污泥均呈黄色，SVI在55~110 mL·g-1，MLVSS/MLSS稳定在0.6~0.8左右，良好的污泥性能为CSTR和MBR短程硝化的快速启动创造了有利条件. MBR在短程硝化快速启动中展现出更明显的优势. |
| 英文摘要 |
| In order to achieve fast start-up of shortcut nitrification, a continuous stirred tank reactor (CSTR) and a membrane bioreactor (MBR) were selected for a comparative study about the start-up characteristic of shortcut nitrification. The differences in three aspects of the two reactors were investigated, namely start-up time, nitrogen transformation, and sludge performance. The results showed that the start-up of shortcut nitrification was successfully achieved in the CSTR and MBR after 44 and 56 days of operation, respectively, with influent C/N=1, temperature around 30℃±1℃, pH of 7.5-8.0, and dissolved oxygen (DO) of 0.6-1.0 mg·L-1, as well as combining anoxic/aerobic ratio 1:3 (15 min:45 min) with shortened hydraulic retention time (HRT). The start-up period of the MBR was shorter. On the 14th, 28th, and 56th day, the average nitrite accumulation efficiencies in the CSTR were 51%, 66%, and 89%, respectively, and 50%, 71%, and 93% in the MBR, and nitrate formation rates of the CSTR was successively 7.4, 4.0, and 1.7 mg·(g·h)-1 (NO3--N/MLVSS), respectively, and 7.6, 3.5, and 1.0 mg·(g·h)-1 (NO3--N/MLVSS) for the MBR. A higher nitrite accumulation efficiency and a lower nitrate formation rate were detected in the MBR on the 28th and 56th day, respectively, which could be beneficial to the fast start-up of shortcut nitrification. During the operation period, the shortcut nitrification sludge in the two reactors was yellow, the sludge volume index (SVI) was between 55 and 110 mL·g-1, and the mixed liquor volatile suspended solids (MLVSS)/mixed liquor suspended solids (MLSS) ratio was around 0.6-0.8. The good sludge performance created favorable conditions for the fast start-up of shortcut nitrification in both the CSTR and MBR. In conclusion, the MBR exhibited better performance in the fast start-up of shortcut nitrification. |
|
|
|
