研究报告

  • 高超龙,狄斐,宋舒兴,徐东耀,魏源送,隋倩雯.一体式膜曝气生物膜反应器实现部分亚硝化-厌氧氨氧化耦合生物除磷[J].环境科学学报,2022,42(9):18-29

  • 一体式膜曝气生物膜反应器实现部分亚硝化-厌氧氨氧化耦合生物除磷
  • Integrated partial nitrification-anammox with biological phosphorus removal process in a one-stage membrane aerated biofilm reactor
  • 基金项目:国家重点研发计划项目(No.2021YFC3200601);中国科学院青年创新促进会项目(No.2021042);广西重点研发计划项目(No.AB21196036)
  • 作者
  • 单位
  • 高超龙
  • 中国矿业大学(北京),化学与环境工程学院,北京 100083;中国科学院生态环境研究中心,水污染控制实验室,北京 100085;中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京 100085
  • 狄斐
  • 中国矿业大学(北京),化学与环境工程学院,北京 100083;中国科学院生态环境研究中心,水污染控制实验室,北京 100085;中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京 100085
  • 宋舒兴
  • 中国科学院生态环境研究中心,水污染控制实验室,北京 100085;中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京 100085;河北工程大学,能源与环境工程学院,邯郸 056038
  • 徐东耀
  • 中国矿业大学(北京),化学与环境工程学院,北京 100083
  • 魏源送
  • 中国科学院生态环境研究中心,水污染控制实验室,北京 100085;中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京 100085
  • 隋倩雯
  • 中国科学院生态环境研究中心,水污染控制实验室,北京 100085;中国科学院生态环境研究中心,环境模拟与污染控制国家重点联合实验室,北京 100085
  • 摘要:针对我国城市生活污水碳氮比低、处理成本高及氮磷同步去除存在碳源竞争等问题,构建了一体式膜曝气生物膜反应器(Membrane aerated biofilm reactor, MABR),分别采用纯生物膜系统和生物膜-絮体污泥复合系统,逐步实现了部分亚硝化-厌氧氨氧化与生物除磷工艺在单一反应器中的耦合及低碳氮比城市生活污水中氮、磷的高效去除.结果表明,第1阶段(纯生物膜系统),在进水中仅含有氨氮的条件下, 部分亚硝化-厌氧氨氧化工艺的NH4+-N和TN去除率分别为65.39%和50.67%.第2阶段(生物膜-絮体污泥复合系统),进水中增加了有机物,在COD/TN为3的条件下,TN和PO43--P的去除率分别达到89.90%和70.42%,实现了氮和磷的同步高效去除.微生物群落分析结果表明,反应器内存在大量的变形菌门(Proteobacteria)和拟杆菌门(Bacteroidota),其中,Proteobacteria在生物膜和絮体污泥均有分布,而Bacteroidota主要分布于絮体污泥;反应器内还检测到了Candidatus KueneniaCandidatus JetteniaCandidatus Brocadia 3种厌氧氨氧化菌,且 Candidatus Brocadia为优势菌属,其在生物膜上的丰度达到了3.23%;此外,Candidatus Competibacter、Defluviicoccus等聚糖菌和聚磷菌Candidatus AccumulibacterDechloromonas在反应器内均有大量富集,共同构成了该生物膜-絮体污泥复合系统,实现了低碳氮比城市生活污水的同步脱氮除磷.
  • Abstract:Aiming at the issues of low C/N ratio, high operation & maintenance costs and carbon source competition during the simultaneous removal of nitrogen and phosphorus for urban domestic sewage, a membrane aerated biofilm reactor (MABR) was established in this study. The combination of the partial nitrification-anammox (PN/A) and biological phosphorus removal was gradually realized in a one-stage reactor through only biofilm reactor and the hybrid of biofilm and activated sludge in the MABR, resulting in high removals of nitrogen and phosphorus for urban sewage with low C/N ratio. In the first stage (straight MABR) with the influent only consisting of ammonia nitrogen (NH4+-N), the PN/A process achieved the removal efficiencies of NH4+-N and TN of 65.39% and 50.67%, respectively. In the second stage (hybrid MABR) with influent at COD/TN of 3, the removal efficiencies of TN and PO43--P reached as high as 89.90% and 70.42%, respectively, realizing the simultaneous removals of nitrogen and phosphorus. The results of microbial community analysis showed that Proteobacteria and Bacteroidota were highly abundant in the reactor. Among them, Proteobacteria was evenly distributed in biofilm and floc, while Bacteroidota was mainly distributed in floc. Three genera of anaerobic ammonia oxidation bacteria were detected in the reactor, including Candidatus Kuenenia, Candidatus Jettenia and Candidatus Brocadia, and Candidatus Brocadia took the dominance. AnAOB reached the highest abundance of 3.16% on the biofilm. In addition, glycogen accumulating organisms (Candidatus Competibacter and Defluviicoccus) and polyphosphate accumulating organisms Candidatus Accumulibacter and Dechloromonas) were also enriched in the reactor, forming the biofilm-floc sludge composite system, which promoted the simultaneous removals of nitrogen and phosphorus for municipal wastewater at low C/N ratio.

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