摘要
通过改变曝气方式和进水COD浓度,研究了未添加和添加固体碳源的生物填料床反应器(分别称为R1和R2)对低温(5℃)人工模拟河水的净化效果。在间歇曝气、连续曝气和不曝气三种情况下,两个反应器的总氮去除率分别为35%、24%、95%和91%、50%、95%,COD去除率分别为94%、95%、95%和75%、95%、54%,R1的的最佳运行方式为不曝气,R2的最佳运行方式为间歇曝气。在进水总氮浓度为14mg/L、不曝气情况下,进水COD浓度较高时,R1对总氮和COD的去除率较高;在进水COD浓度较高或较低时,R2对总氮去除率均较高,表明添加固体碳源有利于反应器对总氮的有效去除。由基于16SrDNA微生物高通量分析结果可知,两个反应器中的优势菌属为简易螺旋菌属、芽殖杆菌属、动胶菌属和不动杆菌属等。
The purification effect of bio-packed bed reactors (called R1 and R2 respectively) without or with solid carbon source on synthetic river water at low temperature (5 ℃) was studied by changing aeration mode and influent COD concentration. Under the three conditions of intermittent aeration, continuous aeration and non-aeration, the total nitrogen removal rates of R1 and R2 were 35 %, 24 %, 95 % and 91 %, 50 % and 95 %, respectively. COD removal rates were 94 %, 95 %, 95 % and 75 %, 95 % and 54 %, respectively. The best operation mode of R1 is non-aeration and of R2 is intermittent aeration. When the influent TN concentration is 14 mg/L and the influent COD concentration was higher, the removal rates of TN and COD were higher in the R1 reactor. The removal rate of TN in R2 were good no matter when the influent COD concentration was higher or lower, which indicated the addition of solid carbon source was benefit to the effective removal of TN. The results of high-throughput microbial analysis based on 16S rDNA showed that the dominant bacteria in R1 and R2 were Simplicispira, Gemmobacter, zoogloea and Acinetobacter.
作者
任海腾
左剑恶
黄帅辰
于恒
Sanjena ND
Ren Haiteng;Zuo Jian’e;Huang Shuaichen;Yu Heng;Sanjena ND(State Key Joint Laboratory of Environment Simulation and Pollution Control (SKLESPC), School of Environment, Tsinghua University, Beijing100084, China)
出处
《广东化工》
CAS
2019年第15期1-4,共4页
Guangdong Chemical Industry
基金
国家十三五水专项“北京城市副中心高品质水生态建设综合示范项目”(项目号2017ZX07103)
关键词
低温
低污染河水
生物反硝化
生物填料床
微生物群落
low temperature
low polluted river water
biological denitrification
bio-packed bed
microbial community
