您好，欢迎访问中国水产科学研究院 机构知识库！
中国水产科学研究院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Encapsulation of microorganisms for simultaneous nitrification and denitrification in aerobic reactors

文献类型： 外文期刊

作者： Li, Hua 1 ; Liu, Qingsong 1 ; Yang, Ping 1 ; Duan, Yafei 1 ; Zhang, Jiasong 1 ; Li, Chunhou 1 ;

作者机构： 1.Minist Agr, Key Lab South China Sea Fishery Resources Exploit, Beijing, Peoples R China

2.Guangdong Prov Key Lab Fishery Ecol Environm, Guangzhou, Guangdong, Peoples R China

3.Chinese Acad Fishery Sci, South China Sea Fisheries Res Inst, Guangzhou 510300, Peoples R China

关键词： Aerobic reactor; Encapsulation; Microorganism immobilization; Simultaneous nitrification and denitrification

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：5.909； 五年影响因子：5.649 ）

ISSN：

年卷期： 2021 年 9 卷 4 期

页码：

收录情况： SCI

摘要： A special denitrifying capsule that was designed according to the theory of maldistribution of DO (dissolved oxygen) for simultaneous nitrification and denitrification (SND) in an aerobic reactor was prepared by an encapsulation technique. The morphology of the denitrifying capsule and its SND performance in an aerobic reactor used for treating synthetic low C/N wastewater were systematically investigated. The spherical capsule comprised a porous membrane, denitrifying active sludge and semen litchi powder, which were cohered together by a physical method. Well-shaped pores were distributed in the membrane and the average pore diameter was approximately 0.25 mu m. Circular pores were present in the cross section of the membrane, and the thickness of the membrane ranged from 95.0 mu m to 120.0 mu m. After 7 days of acclimation, the denitrifying capsule showed good SND performance in an aerobic reactor with a DO concentration of 5.09 mg/L. The NH4+-N concentration of 51.09 mg/L was removed completely after 8 h, the effluent dissolved inorganic nitrogen (DIN) concentration decreased to 6.11 mg/L, the SND ratio reached to 91.6% at 6 h, and finally decreased to 2.09 mg/L at 15 h and could also reach 98.91%. The influent of NH4+-N loading had little effect on the nitrogen removal performance. And decreased of air input induced lower hydraulic shearing force compared to reactors with higher DO had a little effect on the diffusion and mass transfer of NO3--N. With this core shell structure denitrifying capsule, it was easy to achieve SND without controlling the DO concentrations at low levels or using intermittent aeration.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：中国水产科学研究院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台