曝气调控恢复主流自养脱氮性能及脱氮菌群特性研究  

Recovery performance of mainstream autotrophic nitrogen removal and characteristics of functional microbes under aeration control

作　　者：刘人源 罗红梅 涂智 瞿畏 彭阳[4] 陈宏[3] LIU Renyuan;LUO Hongmei;TU Zhi;QU Wei;PENG Yang;CHEN Hong(Guangdong Zi Yuan Environmental Protection Co.Ltd.,Meizhou 514700,China;Hunan Meteorological Service Center,Changsha 410118,China;School of Hydraulic and Environmental Engineering,Changsha University of Science&Technology,Changsha 410114,China;Jiangxi Environmental Engineering Vocational College,Ganzhou 341000,China)

机构地区：[1]广东自远环保股份有限公司,广东梅州514700 [2]湖南省气象服务中心,湖南长沙410118 [3]长沙理工大学水利与环境工程学院,湖南长沙410114 [4]江西环境工程职业学院,江西赣州341000

出　　处：《环境保护科学》2022年第5期105-109,共5页Environmental Protection Science

基　　金：湖南省重点研发计划项目(2022SK2091);水沙科学与水灾害防治湖南省重点实验室开放基金(2020SS05)。

摘　　要：针对主流条件下部分亚硝化-厌氧氨氧化(PNA)工艺难以维持长期稳定运行的问题,采用气升式内循环反应器构建一段式反应系统,探究高溶解氧浓度导致工艺脱氮性能失稳后,原位恢复工艺脱氮性能的可行性及调控策略。结果表明,仅通过适宜的曝气调控,主流PNA工艺的脱氮性能可以实现原位恢复。在进水氨氮浓度为(50±1.81)mg/L、曝气速率为0.30 L/min的条件下,工艺的氮去除率可恢复至74.8%,氮去除速率达0.46 kg N/m^(3)·d。此外,曝气调控能够提高胞外聚合物中蛋白质的含量,从而提升污泥浓度和促进污泥颗粒化;氨氧化活性和厌氧氨氧化活性得到了增强,亚硝酸盐氧化活性得到了有效的控制。在恢复策略的实施下,Candidatus Brocadia属和Nitrosomonas属的相对丰度恢复至5.3%和8.7%,Nitrospira属的相对丰度减少至0.2%。研究结果为厌氧氨氧化技术在主流条件下的应用提供理论指导和技术支持。To solve the stability of partial nitrification-anammox process(PNA)under mainstream conditions,a one-stage PNA system was constructed by an airlift internal circulation reactor.The feasibility of the in-situ recovery and the control strategy of PNA process were explored under an instability condition of nitrogen removal by a high concentration dissolved oxygen.The results showed that the performance of the PNA process could be recovered under an appropriate aeration control.The nitrogen removal efficiency reached 74.8%and the nitrogen removal rate reached 0.46 kg N/m^(3)·d with the influent concentration of(50±1.81)mg/L and the aeration rate of 0.30 L/min.Furthermore,aeration control could improve the protein contents and enhance the sludge concentration.It also promoted the sludge granulation.The specific activity of ammonia oxidation and anammox were enhanced,and the specific activity of nitrite oxidation was inhibited.With the implementation of recovery strategy,the relative abundance of Candidatus Brocadia and Nitrosomonas returned to 5.3%and 8.7%,and the Nitrospira abundance decreased to 0.2%.This study provided a scientific basis for the application of the mainstream anammox process.

关 键 词：部分亚硝化-厌氧氨氧化 主流 性能恢复 曝气调控 氮去除 

分 类 号：X703[环境科学与工程—环境工程]