消除內回流液中溶解氧對反硝化過程影響的對策
郭耀1, 李志華1, 李黔花1, 王慧娟2, 楊成建1西安建筑科技大學環(huán)境與市政工程學院西北水資源與環(huán)境生態(tài)教育部重點實驗室 新疆大學建筑工程學院
[1]郭耀,李志華,李黔花,等.消除內回流液中溶解氧對反硝化過程影響的對策[J].中國給水排水,2020,36(01):1-6.
GUO Yao,LI Zhi-hua,LI Qian-hua,et al.Countermeasures for Eliminating Influence of Dissolved Oxygen in Internal Reflux Liquid on Denitrification Process[J].China Water & Wastewater,2020,36(01):1-6.
點擊復制
GUO Yao,LI Zhi-hua,LI Qian-hua,et al.Countermeasures for Eliminating Influence of Dissolved Oxygen in Internal Reflux Liquid on Denitrification Process[J].China Water & Wastewater,2020,36(01):1-6.
消除內回流液中溶解氧對反硝化過程影響的對策
中國給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 36 期數(shù): 2020年01期 頁碼: 1-6 欄目: 出版日期: 2020-01-01
- Title:
- Countermeasures for Eliminating Influence of Dissolved Oxygen in Internal Reflux Liquid on Denitrification Process
- 摘要:
- 內回流液中的溶解氧濃度偏高是活性污泥法中普遍存在的問題，為了簡單有效地消除內回流液中溶解氧對反硝化過程的影響，針對典型的傳統(tǒng)A/O工藝和多段進水A/O工藝，考察了有限提升進水C/N值、導入內源耗氧過程以及調整進水碳源組分等策略的可行性。結果表明，在傳統(tǒng)A/O工藝中，有限提高進水C/N值對消除內回流液中的溶解氧有一定作用，但在多段進水A/O工藝中此消除作用受到削弱;在兩種工藝中，導入內源耗氧過程均對內回流液中溶解氧有明顯的消除作用，能確保缺氧段進水碳源不被溶解氧消耗，使反硝化正常進行;進水碳源組分對內回流液中溶解氧的消除有一定影響，慢速可生物降解有機物含量過高，在傳統(tǒng)A/O工藝中對內回流液中溶解氧的消除不利，對TN的去除有負面影響，但在多段進水A/O工藝中，由于慢速可生物降解有機物在好氧條件下不會被完全降解，而且會跟隨內回流液轉移到缺氧段，這對消除內回流液中的溶解氧是有利的。
- Abstract:
- The high concentration dissolved oxygen in the internal reflux liquid is a common problem in the activated sludge process. In order to eliminate the influence of dissolved oxygen in internal reflux liquid on denitrification process simply and effectively,the feasibility of strategies such as limited increase of C/N ratio of the influent,introduction of endogenous oxygen consumption process and adjustment of influent carbon source components were investigated in typical traditional A/O process and step-feeding A/O process. The limited increase of C/N ratio had a certain effect on eliminating the dissolved oxygen in the internal reflux liquid of the traditional A/O process,but the effect was weakened in the step-feeding A/O process. The introduction of endogenous oxygen consumption process had an obvious effect on elimination of the dissolved oxygen in the internal reflux liquid of the two processes. The strategy could ensure that the carbon source in the anoxic section was not consumed by the dissolved oxygen,so that the denitrification could proceed normally. The carbon source components in the influent had a certain effect on the elimination of dissolved oxygen in the internal reflux liquid. Excessively high content of slowly biodegradable organic matter was detrimental to the elimination of dissolved oxygen in the internal reflux liquid of the traditional A/O process and had a negative impact on the removal of TN.However,the slowly biodegradable organic matter would not be completely degraded under aerobic conditions and would be transferred to the anoxic section along with the reflux in the step-feeding A/O process,which was beneficial to eliminate dissolved oxygen in the internal reflux liquid.
