一段式部分亚硝化-厌氧氨氧化工艺处理中低浓度模拟氨氮废水  

Treatment of simulated medium and low-strength ammonia wastewater by single-stage partial nitritation-anammox process

作　　者：赵良杰 彭党聪[1,2] 吕恺 王静 ZHAO Liangjie;PENG Dangcong;LYU Kai;WANG Jing(School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China;Key Laboratory of Northwest Water Resource,Environment and Ecology,Ministry of Education,Xi'an 710055,China;Xi'an Branch of North China Municipal Engineering Design&Research Institute Co.Ltd.,Xi'an 710016,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]西北水资源与环境生态教育部重点实验室,西安710055 [3]中国市政工程设计院华北设计研究总院有限公司西安分公司,西安710016

出　　处：《环境工程学报》2021年第1期143-151,共9页Chinese Journal of Environmental Engineering

基　　金：陕西省2019年重点研发计划(2019ZDLSF06-05)。

摘　　要：采用序批式反应器(sequencing batch reactor,SBR)研究了一段式部分亚硝化-厌氧氨氧化工艺处理中低浓度氨氮废水的运行稳定性。结果表明,在温度为35℃、进水氨氮浓度为200 mg·L^(-1)、溶解氧为0.2~0.4 mg·L^(-1)条件下,一段式部分亚硝化-厌氧氨氧化反应器去除负荷(以TN计)可达到0.24 kg·(m^(3)·d)^(-1),平均去除率为75.84%,成功实现了一段式部分亚硝化-厌氧氨氧化的稳定运行。污泥中氨氧化菌(ammonia oxidizing bacteria,AOB)和厌氧氨氧化菌(anaerobic ammonia oxidation,Anammox)活性(以NH4+-N计)分别稳定在877.24 mg·(g·d)^(-1)和127.61 mg·(g·d)^(-1),(以NO^(2-)-N计)下降至18.54 mg·(g·d)^(-1),NOB被成功抑制,AOB与Anammox菌之间形成良好的协同作用,保证了稳定的脱氮效果。FISH结果表明,污泥中的优势菌为AOB和Anammox菌,从微生物角度佐证了一段式部分亚硝化-厌氧氨氧化反应器维持较好脱氮效果的长期运行稳定性。一段式部分亚硝化厌氧氨氧化工艺的稳定运行可为厌氧氨氧化技术处理中低浓度氨氮废水提供参考。The stability of single-stage partial nitritation-anammox process was studied using a sequencing batch reactor(SBR)treating medium and low-strength ammonia wastewater.Results showed that TN removal loading and average TN removal efficiency could reach 0.24 kg·(m^(3)·d)^(-1) and 75.84%in the single-stage partial nitritation-anammox reactor,respectively,at 35℃,the influent ammonia concentrations of 200 mg·L^(-1) and the dissolved oxygen of 0.2~0.4 mg·L^(-1).The stable running of the reactor was achieved with high performance of nitrogen removal.The activities of ammonia oxidizing bacteria(AOB)and anaerobic ammonia oxidation bacteria(Anammox)stably maintained at about 877.24 mg·(g·d)^(-1) and 127.61 mg·(g·d)^(-1)(as respectively.At the same time,the activity of nitrite oxidizing bacteria(NOB)decreased from 60.84 mg·(g·d)^(-1) to 18.54 mg·(g·d)^(-1)(as NO^(2-)-N),thus NOB was successfully inhibited.AOB and Anammox bacteria could build a better collaborative relationship that ensured the stable nitrogen removal effect.The FISH results indicated that AOB and Anammox bacteria were dominant bacteria,which proved the long stability of efficient nitrogen removal for the single stage partial nitritation-anammox process from the viewpoint of microbiology.The stable operation of the single stage partial nitritation-anammox process provides reference for medium and lowstrength concentration ammonia wastewater treatment by anaerobic ammonia oxidation technology.

关 键 词：部分亚硝化 厌氧氨氧化 一段法 间歇曝气 氨氮 亚硝氮积累 

分 类 号：X703.1[环境科学与工程—环境工程]