碳氮比对好氧流化床生物膜反应器氮去除机制研究  

Effect of Carbon Nitrogen Ratio on Nitrogen Removal Mechanism in Aerobic Biofilm Reactor

作　　者：席晨晨 程文[1] 焦梦 任杰辉 张杏 万甜[1] XI Chenchen;CHENG Wen;JIAO Meng;REN Jiehui;ZHANG Xing;WAN Tian(Institute of water Resources and Hydro-Electric Engineering,Xi'an University of Technology,710048;Power China Construction Northwest Engineering Corporation Limited,710065,Xi'an,China)

机构地区：[1]西安理工大学水利水电学院,西北旱区生态水利国家重点实验室,710048 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《水处理技术》2022年第5期76-80,共5页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(51679192);陕西省重点研发计划(2017SF-392)。

摘　　要：以好氧流化床生物膜反应器为研究对象,探究了不同碳氮比条件下系统运行过程中污染物的去除效果,解析了24 h内不同时间氮的去除规律,旨在深入完善该系统的脱氮机制。研究发现,碳氮比显著(P<0.01)改变了总氮(TN)、氨氮(NH_(4)^(+)-N)和总磷(TP)的去除效果,去除率分别可达84.22%、84.83%和87.33%;低碳氮比条件(C/N=4.8)下NH_(4)^(+)-N的质量浓度呈降低趋势(t<10 h),当运行时间t≥10 h,其含量基本稳定不变;在较高碳氮比(C/N≥9.5)时,随着运行时间的增加NH_(4)^(+)-N质量浓度呈现逐渐降低的趋势,且高碳氮比增加了NH_(4)^(+)-N的去除。合适的碳氮比有助于改善处理污水中脱氮过程的进行。Taking aerobic biofilm reactor as the research object,the removal effect of pollutants in the process of system operation under different C/N ratios was explored and the rule of nitrogen removal at different time within 24 hours was analyzed,which was aimed to further improve the nitrogen removal mechanism of the system.The results showed that the C/N ratio changed the removal efficiencies of TN,NH_(4)^(+)-N and TP significantly(P<0.01),and the removal rates were 84.22%,84.83%and 87.33%,respectively.The concentration of NH_(4)^(+)-N showed a decreasing trend(t<10 h)under the condition of a low carbon nitrogen ratio(C:N=4.8).When the running time was above 10 h,the content of NH_(4)^(+)-N was basically stable.At a high carbon nitrogen ratio(C:N≥9.5),NH_(4)^(+)-N concentration decreased with the increase of operation time,and the removal of NH_(4)^(+)-N increased with the increase of carbon nitrogen ratio.An appropriate carbon nitrogen ratio is helpful to improve the denitrification process.

关 键 词：碳氮比 生物膜 脱氮机制 去除规律 

分 类 号：TQ028.8[化学工程]