多次回流条件下间歇厌氧/好氧反应器的低碳脱氮  

Mechanisms of Nitrogen Removal from Wastewater with Low Carbon Source in Anaerobic/Oxic Batch Reactor under Multiple Recycling Conditions

作　　者：李巍巍[1] 王晓昌[1] 唐嘉陵[1] 夏四清[1,2] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,陕西西安710055 [2]同济大学环境科学与工程学院,上海200092

出　　处：《中国给水排水》2014年第15期25-28,共4页China Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07310);陕西省污水处理与资源化重点科技创新团队项目(2013KCT-13);陕西省"百人计划"项目

摘　　要：回流是影响脱氮过程的重要因素之一。利用间歇厌氧/好氧反应器经过四次回流对低碳源污水进行处理,在40 d的运行中,对NH+4-N、TN、COD的去除率分别为99%、70%和90%。在低C/N值条件下,反应器对高NH+4-N负荷具有较强的抗冲击能力和较高的去除率。较低的COD浓度是限制脱氮效率进一步提高的主要因素。周期内沿程试验表明,利用污泥的吸附性能,上清液经过四次回流,好氧硝化与厌氧反硝化过程被完全分离并交替进行,污染物被逐级转换,完成脱氮过程。此外,好氧池中DO浓度和厌氧池中ORP值的变化进一步验证了硝化与反硝化过程的变化规律。Recycling is one of the critical factors for nitrogen removal. Wastewater with low carbon source was treated by 4-time recycling in anaerobic/oxic batch reactor. The removal rates of NH4＋ - N, TN and COD were 99% , 70% and 90% respectively during the operating time of 40 days. The reactor had a strong resistance to high NH4 - N loading and high removal rate of NH4＋ - N under low C/N ratio condition. However, low COD was a limiting factor for improving nitrogen removal. The tests showed that based on adsorption of biomass and by recycling the supernatant 4 times, nitrification and denitrification were separated and performed alternately, and pollutants ORP confirmed the pathways of nitrogen removal in two were removed gradually. The changes of DO and completely different conditions.

关 键 词：间歇厌氧 好氧反应器 回流 低碳源污水 脱氮 

分 类 号：X703[环境科学与工程—环境工程]