一种CANON工艺处理低氨氮废水的新模式

发布时间：2018-06-11 12:57

本文选题：厌氧氨氧化 + 全程自养脱氮工艺(CANON)　；参考：《环境科学》2017年03期

【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NH_4~+-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·(m~3·d)~(-1)逐渐升高到1.47 kg·(m~3·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DO0.01 mg·L~(-1),对系统中的NOB起到了良好的抑制效果,同时也为An AOB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NO_2~-的产生速率,使得与NO_2~-消耗速率达到一个良好的平衡状态,避免了NO_2~-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.
[Abstract]:Using upflow sludge bed reactor, the canon process was quickly started by reoxygenation of effluent, and the characteristics of start-up and operation process were studied. The results show that the canon process can be started quickly and run stably by reoxygenation of effluent, when the sludge volume fraction is 25 and the influent NH4- N is 157mg / L ~ (-1) HRT is 2 h, after 50 days of stable operation. The total nitrogen removal rate (NRR) increased from 1.31 kg / d ~ (-1) to 1.47 kg / d ~ (-1). The reoxygenation method effectively controlled the amount of dissolved oxygen in the reactor, which made DO0.01 mg / L of doxorubicin (DO0.01 mg / L) play a good role in the inhibition of NOB in the system, and also provided a good growth environment for an AOB. By controlling the amount of reflux, we can accurately control the production rate of no _ 2 ~ (-), and make the consumption rate of no _ 2 ~ + reach a good equilibrium state, thus avoiding the accumulation of no _ 2 ~ (-) and the occurrence of nitrification reaction. Therefore, the reoxygenation reflux CANON process has a great advantage in the stability of operation, which provides a new model for the treatment of low ammonia nitrogen wastewater by the reoxygenation reflux CANON process.
【作者单位】：苏州科技大学环境科学与工程学院;苏州科技大学环境生物技术研究所;
【基金】：国家重点研发计划项目(2016YFC0401108) 国家自然科学基金项目(51478284,51408387) 江苏省特色优势学科二期立项项目江苏省水处理技术与材料协同创新中心项目苏州科技学院科研基金项目青年项目(341410031);苏州科技学院人才引进科研项目(331411202)
【分类号】：X703.1

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