| 一种CANON工艺处理低氨氮废水的新模式 |
| 摘要点击 3444 全文点击 1172 投稿时间：2016-09-26 修订日期：2016-10-20 |
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| 中文关键词 厌氧氨氧化 全程自养脱氮工艺(CANON) 复氧回流 NOB的抑制 |
| 英文关键词 ANAMMOX completely autotrophic nitrogen removal over nitrite(CANON) reoxygenation reflux NOB inhibition |
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| 中文摘要 |
| 利用上流式污泥床反应器，以出水复氧回流的方式快速启动CANON工艺，并研究了启动及运行过程特征.结果表明，以出水复氧进行回流的方式可以快速启动并稳定运行CANON工艺；在污泥体积分数为25%，进水NH4+-N为157 mg·L-1，HRT为2 h的条件下，经过50 d的稳定运行，总氮去除速率NRR从1.31 kg·（m3·d）-1逐渐升高到1.47 kg·（m3·d）-1.复氧回流的方式有效地控制了反应器内溶解氧的量，使得DO<0.01 mg·L-1，对系统中的NOB起到了良好的抑制效果，同时也为AnAOB提供了一个良好的生长环境；通过控制回流量的大小可以精确地控制NO2-的产生速率，使得与NO2-消耗速率达到一个良好的平衡状态，避免了NO2-的积累及其硝化反应的发生.因此，复氧回流CANON工艺在运行的稳定性方面表现出了很大的优势，为CANON工艺处理低氨氮废水提供了一个新模式. |
| 英文摘要 |
| Automatic aeration and recirculation of effluent were used to start CANON process with up flow sludge bed reactor, and the start-up and operation characteristics of the process were studied. The results showed that the CANON process could be started quickly and stably by the method of reoxygenation reflux under the conditions of sludge volume fraction 25%, NH4+-N 157 mg·L-1, HRT 2 h. After 50 days of operation, the total nitrogen removal rate increased from 1.31 kg·(m3·d)-1 to 1.47 kg·(m3·d)-1; the reoxygenation reflux manner could effectively control the amount of dissolved oxygen in the reactor, resulting in DO<0.01 mg·L-1, which had a good inhibitory effect on the NOB in the system, and meanwhile provided a good growth environment for AnAOB; By controlling the reflux flow, the production rate of NO2- could be precisely controlled, reaching a good balance with NO2- consumption rates, and thus avoiding the accumulation of NO2- and occurrence of nitration reactions. Therefore, reoxygenation reflux CANON process showed a great advantage in the operation stability, which provided a new model for the start-up and stable operation of CANON process. |
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