曝停比对低温单级自养脱氮系统效能影响研究  

Effect of Aeration/Idle Time Ratio on Single-stage Autotrophic Nitrogen Removal System at Low Temperature

作　　者：韩懿 张建兵[2] 黄巍[3] 林子源 周健[3] HAN Yi;ZHANG Jian-bing;HUANG Wei;LIN Zi-yuan;ZHOU Jian(School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;Tianjin Municipal Engineering Design ＆ Research Institute,Tianjin 300051,China;Key Laboratory of Three Gorges Reservoir Region＇s Eco-Environment 〈 Ministry of Education 〉,Chongqing University,Chongqing 400045,China)

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市市政工程设计研究院,天津300051 [3]重庆大学三峡库区生态环境教育部重点实验室,重庆400045

出　　处：《中国给水排水》2018年第21期70-73,共4页China Water & Wastewater

基　　金：天津市科委企业科技特派员项目(18JCTPJC60400);天津市教委科研计划项目(2016CJ10)

摘　　要：针对现有单级自养脱氮技术普遍需要中高温(25～35℃)运行条件、处理成本高的突出问题,以高浓度氨氮(≥2 000 mg/L)废水为研究对象,考察曝停比对低温(15℃)单级自养脱氮系统脱氮效能的影响。结果表明,曝停比对系统的脱氮效能有影响,在15℃、DO为2. 5 mg/L条件下,反应器曝停比分别为2 h∶2 h、4 h∶4 h、6 h∶6 h、12 h∶12 h时,系统出水TN浓度分别为267. 5、238. 0、275. 1、367. 6 mg/L,去除率分别为86. 6%、88. 1%、86. 2%和81. 6%;曝停比为4 h∶4 h时,系统对TN的去除率较高。反应器停曝时间越长,反应器内液相DO、ORP值越低,液相DO、ORP水平影响自养脱氮系统微环境区域分布比例。The existing single-stage autotrophic nitrogen removal technology generally requires high temperature （25 - 35℃） operating conditions and high costs of treatment. Using high ammonia nitrogen wastewater （ ≥2 000 mg/L）, influence of aeration/idle time ratio on the single-stage autotrophic nitrogen removal system was investigated and confirmed. Under the temperature of 15 ℃ and DO of 2.5 mg/L, when the time ratios were 2 h ： 2 h, 4 h ： 4 h, 6 h ： 6 h and 12 h ： 12 h, the effluent concentrations of TN were 267.5 mg/L, 238.0 mg/L, 275.1 mg/L and 367.6 mg/L, and removal rates were 86.6% , 88.1%, 86.2% and 81.6%, respectively. When the time ratio was 4 h ： 4 h, the TN removal rate was the highest. The longer the idling, the lower the DO and the ORP in the liquid phase, which subsequently affected the microenvironment distribution ratio of the autotronhic nitrogen removal system.

关 键 词：高氨氮废水 单级自养脱氮 曝停比 低温 

分 类 号：TU992.3[建筑科学—市政工程]