工业水处理 ›› 2022, Vol. 42 ›› Issue (6): 92-99. doi: 10.19965/j.cnki.iwt.2022-0050

• 可持续发展污水处理专题 • 上一篇    下一篇

两级厌氧氨氧化工艺对厨余废水的脱氮性能研究

王思琦1,2,3(), 李贇2, 陈福明2, 刘淑杰2, 王伟3   

  1. 1. 深圳清华大学研究院,广东 深圳 518057
    2. 清研环境科技股份有限公司,广东 深圳 518057
    3. 清华大学环境学院,北京 100084
  • 收稿日期:2022-03-02 出版日期:2022-06-20 发布日期:2022-06-22
  • 作者简介:

    王思琦(1992— ),博士,工程师。电话:13020028182,E-mail:

Performance research on two-stage anaerobic ammonia oxidation(Anammox) process for removing nitrogen in kitchen wastewater

Siqi WANG1,2,3(), Yun LI2, Fuming CHEN2, Shujie LIU2, Wei WANG3   

  1. 1. Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China
    2. Qingyan Environmental Technology Co. , Ltd. , Shenzhen 518057, China
    3. School of Environment, Tsinghua University, Beijing 100084, China
  • Received:2022-03-02 Online:2022-06-20 Published:2022-06-22

摘要:

厨余废水具有氨氮浓度高的特点,常用的两级硝化反硝化脱氮工艺停留时间长、占地面积大,难以广泛应用。厌氧氨氧化(Anammox)作为一种节能高效的脱氮方式,可大幅缩短水力停留时间、减少占地。本研究提出采用Anammox处理厨余废水厌氧出水,探究两级Anammox工艺处理厨余废水厌氧出水并实现高效脱氮的可行性和稳定性。结果表明,两级Anammox工艺处理厨余废水厌氧出水实现了最高的总氮去除率(90.1%),总氮去除效率达到2 050 mg/(L·d)以上。两级Anammox工艺对总氮的去除是通过Anammox和反硝化耦合作用实现的,其中Anammox贡献了87.7%,反硝化贡献了2.4%。微生物群落分析结果表明,Anammox反应器中主要的厌氧氨氧化菌为Candaditue kuenenia,两级Anammox反应器相对于一级反应器具有较高的适应性,可保持较高的Candaditue kuenenia相对丰度,有助于实现高效稳定脱氮。该研究结果为厨余废水处理提供了高效省地的新工艺。

关键词: 厨余废水, 厌氧氨氧化, 脱氮, 微生物

Abstract:

Kitchen wastewater has high ammonia nitrogen concentration and was usually treated by two-stage nitrification and denitrification process. It needed long hydraulic retention time and a large area,so that it was difficult to be widely used. Anaerobic ammonia oxidation(Anammox) is an efficient nitrogen removal method,which greatly shorten the hydraulic retention time and reduce the area. Therefore,in this study,two-stage Anammox process was used to treat anaerobic effluent of kitchen wastewater and its feasibility and stability were further explored. The results showed that the two-stage Anammox process achieved the highest nitrogen removal rate of 90.1% and the total nitrogen removal efficiency reached 2 050 mg/(L·d). The total nitrogen removal by the two-stage Anammox process was achieved through the coupling of Anammox and denitrification,in which Anammox contributed 87.7%,denitrification contributed 2.4%. Microbial community analysis showed that the main Anammox bacteria in Anammox reactors was Candidatus kuenenia. The two-stage Anammox reactor had higher adaptability relative to the one-stage reactor and it could maintain a high relative abundance of Candaditue kuenenia,which was propitious to achieve efficient and stable nitrogen removal. The results of this study provided an efficient and land-saving new process for the treatment of kitchen wastewater.

Key words: kitchen wastewater, anaerobic ammonia oxidation, nitrogen removal, microorganisms

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