缺氧-好氧连续流亚硝化颗粒污泥反应器的启动及稳定运行  

Startup and Stabilization of Nitrosation in an Anoxic-aerobic Continuous-flow Reactor with Granules

作　　者：李冬[1] 郭跃洲 劳会妹 曹美忠 张杰[1,2] LI Dong;GUO Yue-zhou;LAO Hui-mei;CAO Mei-zhong;ZHANG Jie(Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering,Beijing University of Technology,Beijing 100124,China;State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《环境科学》2019年第1期369-375,共7页Environmental Science

基　　金：北京市青年拔尖团队项目(2014000026833TD02)

摘　　要：在室温下(17~19℃),通过接种成熟的亚硝化颗粒污泥于缺氧-好氧连续流反应器中,研究连续流亚硝化颗粒污泥的启动及稳定运行.结果表明,在启动阶段,颗粒污泥系统的亚硝态氮积累率(NAR)平均超过95%,成功启动了缺氧-好氧连续流亚硝化颗粒污泥系统.将好氧区溶解氧(DO)由(3±0.2) mg·L^(-1)提高到(4.5±0.2) mg·L^(-1),探究DO对于该连续流系统的影响.结果表明,在较高DO下,缺氧-好氧连续流亚硝化颗粒污泥系统仍能保持良好的亚硝化性能,平均NAR大于95%.另外,通过改变进水的水力停留时间(HRT),探究HRT对于该连续流系统的影响.较短的水力停留时间(8.4 h)会加快污泥颗粒在系统中的循环,使破碎的颗粒污泥不能及时重组,致使污泥颗粒沉淀性变差,造成污泥颗粒的流失.HRT增加到12.2h时,颗粒污泥系统得到了恢复,并且可以稳定运行.在运行末(166 d),氨氮去除率和NAR分别为86.7%和96.2%.Matured nitrosation granules were inoculated to an anoxic-aerobic continuous-flow reactor at room temperature (17-19℃). The startup and stabilization of nitrosation with granules were studied. The results show that the nitrosation of the continuous-flow was successfully achieved with an average nitrite accumulation rate (NAR) above 95%. With the increase of the dissolved oxygen (DO) content from (3±0.2) to (4.5±0.2) mg·L^-1 in the aerobic zone, the NAR remained above 95%. The effect of the hydraulic retention time (HRT) of the continuous-flow reactor was investigated. The short HRT (8.4 h) sped up the circulation of the sludge particles in the continuous-flow system such that the broken granular sludge could not be integrated in time, resulting in the deterioration of granular sludge settling and the loss of sludge granules. The performance of the system was restored with the increase of the HRT to 12.2 h and the continuous-flow system stabilized. The ammonia removal efficiency and NAR were 86.7% and 96.2% on day 166, respectively.

关 键 词：亚硝化颗粒污泥 缺氧-好氧 亚硝态氮积累率(NAR) 溶解氧(DO) 水力停留时间(HRT) 

分 类 号：X703[环境科学与工程—环境工程]