摘要
常温(25±1)℃条件下,研究了不同曝气模式对亚硝化启动和稳定运行的影响。结果表明:长期的连续曝气模式(曝气时间为10 h)无法实现亚硝化的启动,而短期连续曝气模式(曝气时间6 h)和间歇曝气模式(曝气30 min/停曝30 min)皆能够实现亚硝化的启动及稳定运行,NO_(2)^(-)-N累积率可分别达到88.81%和64.48%。曝气/停曝模式的切换,能够有效降低亚硝酸氧化菌的活性,同时由于好氧/缺氧环境的切换,也降低了部分氨氧化细菌活性,使得间歇曝气模式的出水NO_(2)^(-)-N/NH_(4)^(+)-N能够满足后续厌氧氨氧化工艺的进水需求。连续曝气模式由于较长时间的曝气,可以提供一个稳定的生存环境,虽然有利于氨氧化细菌的生长和代谢,实现较高的亚硝态氮累积率,但无法满足后续的厌氧氨氧化对于NO_(2)^(-)-N/NH_(4)^(+)-N的进水要求。
The effects of different aeration modes on the start-up and stable operation of nitrification were studied at room temperature(25±1)℃.The results showed that a long continuous aeration mode(aeration time of 10 h)could not achieve nitrification.However,long continuous aeration mode(aeration time of 6 h)and intermittent aeration mode(aeration time of 30 min/anaerobic of 30 min)could both achieve the start-up and stable operation of nitrification,and the accumulation rate of nitrite nitrogen could reach 88.81%and 64.48%,respectively.The switching mode of aeration/anaerobic could effectively reduce the activity of nitrite-oxidizing bacteria.Meanwhile,the switching of aerobic/anoxic mode could also reduce the activity of some ammonia-oxidizing bacteria,therefore,the effluent NO_(2)^(-)-N/NH_(4)^(+)-N of the intermittent aeration mode could meet the influent demand of the subsequent anammox process.Continuous aeration mode could provide a stable living environment due to long-time aeration,which was advantageous to the growth and metabolism of ammonia-oxidizing bacteria and to achieve a higher nitrite accumulation rate,but it cannot meet the subsequent anammox influent’s requirements on ratio of NO_(2)^(-)-N to NH_(4)^(+)-N.
作者
张驰
沙宏举
孙剑平
律泽
胡筱敏
ZHANG Chi;SHA Hongju;SUN Jianping;LÜZe;HU Xiaomin(School of Municipal&Environmental Engineering,Shenyang Jianzhu University,Shenyang 110168,China;School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第8期51-56,64,共7页
Environmental Engineering
基金
国家重大科技专项“辽河流域水污染物排放限值研究”(2012ZX07505002)。
关键词
常温
亚硝化
曝气模式
氨氧化细菌
亚硝酸氧化菌
room temperature
nitrification
aeration mode
ammonia oxidizing bacteria
nitrite-oxidizing bacteria
作者简介
第一作者:张驰(1990-),男,讲师,主要研究方向为污水微生物治理。64831713zc@sina.com;通讯作者:胡筱敏(1958-),男,教授,博士生导师,主要研究方向为微生物治理和污水处理。hxmin_jj@163.com。
