| 盐度对好氧颗粒污泥硝化过程中N2O产生量的影响 |
| 摘要点击 2233 全文点击 1048 投稿时间：2014-04-18 修订日期：2014-06-12 |
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| 中文关键词 盐度 好氧颗粒污泥 生物脱氮 硝化过程 N2O |
| 英文关键词 salinity aerobic granular sludge biological nitrogen removal nitrification process N2O |
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| 中文摘要 |
| 采用好氧SBR反应器，考察盐度在0、5、10 g·L-1条件下好氧颗粒污泥全程硝化过程中N2O产生量的变化情况以及对系统脱氮效果的影响. 结果显示，随着污水中盐度增加，N2O产生量呈递增趋势. 在3个盐度下（0、5、10 g·L-1），溶解态N2O产生量分别为1.21、8.99、24.81 mg·m-3，释放态N2O产生量分别为0.95、3.46、16.45mg·m-3. 在盐度为5 g·L-1和10 g·L-1条件下，N2O释放速率分别为0 g·L-1时的3.6倍和17.4倍. 在3种盐度条件下无论是溶解态N2O还是释放态N2O产生量在硝化过程的变化趋势均是先上升后下降，且溶解态N2O产生量大于释放态产量. 另外当盐度浓度较低时（低于5 g·L-1），对NH4+-N去除效果影响较小，NH4+-N的去除率与盐度为0 g·L-1时基本相同，均在98%以上；但当盐度升至10 g·L-1后，NH4+-N的去除率降到了70%. 因此，污水中盐度增加不仅影响NH4+-N的去除效率，而且增加N2O产生量. |
| 英文摘要 |
| An aerobic SBR biological wastewater treatment system was adopted to measure the N2O production and nitrogen removal using aerobic granular sludge nitrification process under 0,5,10 g·L-1 salinity conditions. The results showed that the N2O production increased with the increase of salinity concentration. At three salinity levels (0,5, 10 g·L-1), the dissolved N2O production was 1.21, 8.99, 24.81mg·m-3, respectively, and the released N2O was 0.95, 3.46, 16.45 mg·m-3, respectively. The N2O release rates at the 5 g·L-1 and 10 g·L-1 salinity levels were 3.6 and 17.4 times as high as that at the 0 g·L-1 salinity level. Under various salinity conditions both the dissolved and releasing state N2O production first increased and then decreased, and the dissolved N2O production was greater than that in the releasing state. In addition, when the salinity was low (less than 5 g·L-1), the NH4+-N removal rate was less affected and almost the same with the condition of 0 g·L-1, both over 98%. When the salinity was increased to 10 g·L-1, the NH4+-N removal rate dropped to 70%. Thus, increasing the salinity of wastewater not only affected the system nitrogen removal rate but also increased the amount of N2O production. |
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