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

Treatment of nitrogen-rich wastewater by mixed aeration combined with bioaugmentation in a sequencing batch biofilm reactor: Biofilm formation and nitrogen-removal capacity analysis

文献类型： 外文期刊

作者： Lu, Zhuoyin 1 ; Li, Zhifei 1 ; Cheng, Xiangju 1 ; Xie, Jun 2 ; Li, Xiangyang 3 ; Jiang, Xiaotian 3 ; Zhu, Dantong 1 ;

作者机构： 1.South China Univ Technol, Sch Civil Engn & Transportat, State Key Lab Subtrop Bldg Sci, Guangzhou 510641, Peoples R China

2.Chinese Acad Fishery Sci, Pearl River Fisheries Res Inst, Key Lab Trop & Subtrop Fishery Resource Applicat &, Minist Agr, Guangzhou 510380, Peoples R China

3.Guanghuiyuan Hydraul Construct Engn Co Ltd, Shenzhen 518020, Peoples R China

关键词： Bioaugmentation; Biofilm formation; Aerobic denitrifiers; Nanobubble aeration; Microbial community

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.7； 五年影响因子：7.3 ）

ISSN： 2213-2929

年卷期： 2023 年 11 卷 2 期

页码：

收录情况： SCI

摘要： The mixed aerated and bioaugmented sequencing batch biofilm reactor (SBBR) was developed to improve the efficiency of nitrogen-rich wastewater treatment, and the mechanism of biofilm formation and nitrogen removal was analyzed. The results showed that the addition of aerobic denitrifiers could shorten the start-up time and significantly improve the biofilm formation ability of SBBRs. The presence of nanobubbles could make the biofilm more compact and secrete more EPS, which promoted the activity and stability of the biofilm. During the stable operation stage, the bioaugmented SBBR under mixed aeration mode showed the best nitrogen removal performance and the removal rates of NH4+-N (95.65) and TN (94.88%) were increased by 19.86% and 14.36% compared with the control group, respectively. Microbial community structure and nitrogen metabolism pathway analysis revealed that strain ZS1 colonized the reactor. Hyphomonas, Defluviicoccus and Hydrogenophaga played important roles in N removal in the mixed aerated and bioaugmented SBBR. Meanwhile, the suitable oxidative environment created by mixed aeration made autotrophic nitrifiers(mainly Nitrospira and Nitrosomonas)and aerobic denitrifiers (mainly Hydrogenophaga, Hyphomonas and Pseudofulvimonas) coexist successfully, increasing the relative abundance of the key functional genes (amoABC, hao, napAB genes) in nitrification and denitrification processes to improve the N removal performance. Furthermore, mixed aeration combined with bioaugmented stimulated the nirA, gltBD and GLUD genes, thus promoting the process of nitrogen assimilation and providing a pathway of the direct removal of NH4+-N.

  • 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