| 硫酸盐还原-氨氧化反应的特性研究 |
| 摘要点击 2619 全文点击 1486 投稿时间：2013-02-28 修订日期：2013-04-16 |
| 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 硫酸盐还原 厌氧氨氧化 单质硫 特性 |
| 英文关键词 sulfate reduction ANAMMOX elemental sulfur characteristics |
|
| 中文摘要 |
| 将接种的ANAMMOX污泥进行自养条件下的硫酸盐还原-氨氧化反应,实验发现硫酸盐还原-氨氧化反应是pH下降的过程,其产物为单质硫和氮气,NO3--N是其中间产物. NH4+-N/SO42--S的转化比随着原水n(N)/n(S)比的减小而减小,其中原水n(N)/n(S)比对氨的转化率影响不大,低的n(N)/n(S)比可以提高SO42--S的转化率,但却使NH4+-N转化为NO3--N的比率增大,导致n(TN)/n(TS)的去除比减小. 这表明硫酸盐还原-氨氧化反应不是基元反应. 硫酸盐能把氨氧化为NO-2-N或NO3--N,其中转化为NO3--N的反应是限速步骤,缩短反应时间有利于氮损失. |
| 英文摘要 |
| The sulfate reduction-ammonia oxidation reaction with ANAMMOX sludge at autotrophic condition was implemented. It was found that the pH level decreased during the reaction. Elemental sulfur and nitrogen gas were the final products, while NO3--N was the intermediate product during the sulfate reduction-ammonia oxidation reaction. The conversion ratio of NH4+-N/SO42--S decreased with the decrease in n(N)/n(S) (molar ratio) of raw water. n(N)/n(S) of raw water had little effect on the ammonia conversion ratio. Lower n(N)/n(S) could improve the SO42--S conversion ratio, but with more NH4+-N oxidized into NO3--N, resulting in decreased n(TN)/ n(TS) removal ratio. This indicates that the sulfate reduction-ammonia oxidation reaction is not an elementary reaction. Ammonia can be oxidized into NO-2-N or NO3--N by sulfate. Shortening the reaction time would be conducive to nitrogen losses,because the reaction of NO3--N production is the rate-limiting step. |
|
|
|
