消除內(nèi)回流液中溶解氧對(duì)反硝化過(guò)程影響的對(duì)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(xué)環(huán)境與市政工程學(xué)院西北水資源與環(huán)境生態(tài)教育部重點(diǎn)實(shí)驗(yàn)室 新疆大學(xué)建筑工程學(xué)院
[1]郭耀,李志華,李黔花,等.消除內(nèi)回流液中溶解氧對(duì)反硝化過(guò)程影響的對(duì)策[J].中國(guó)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(diǎn)擊復(fù)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(nèi)回流液中溶解氧對(duì)反硝化過(guò)程影響的對(duì)策
中國(guó)給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 36 期數(shù): 2020年01期 頁(yè)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(nèi)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(wèn)題，為了簡(jiǎn)單有效地消除內(nèi)回流液中溶解氧對(duì)反硝化過(guò)程的影響，針對(duì)典型的傳統(tǒng)A/O工藝和多段進(jìn)水A/O工藝，考察了有限提升進(jìn)水C/N值、導(dǎo)入內(nèi)源耗氧過(guò)程以及調(diào)整進(jìn)水碳源組分等策略的可行性。結(jié)果表明，在傳統(tǒng)A/O工藝中，有限提高進(jìn)水C/N值對(duì)消除內(nèi)回流液中的溶解氧有一定作用，但在多段進(jìn)水A/O工藝中此消除作用受到削弱;在兩種工藝中，導(dǎo)入內(nèi)源耗氧過(guò)程均對(duì)內(nèi)回流液中溶解氧有明顯的消除作用，能確保缺氧段進(jìn)水碳源不被溶解氧消耗，使反硝化正常進(jìn)行;進(jìn)水碳源組分對(duì)內(nèi)回流液中溶解氧的消除有一定影響，慢速可生物降解有機(jī)物含量過(guò)高，在傳統(tǒng)A/O工藝中對(duì)內(nèi)回流液中溶解氧的消除不利，對(duì)TN的去除有負(fù)面影響，但在多段進(jìn)水A/O工藝中，由于慢速可生物降解有機(jī)物在好氧條件下不會(huì)被完全降解，而且會(huì)跟隨內(nèi)回流液轉(zhuǎn)移到缺氧段，這對(duì)消除內(nèi)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.
