• 综合
  • 标题
  • 关键词
  • 摘要
  • 学者
  • 期刊-刊名
  • 期刊-ISSN
  • 会议名称
搜索

作者:

Fan, Jiarui (Fan, Jiarui.) | Du, Rui (Du, Rui.) | Liu, Qingtao (Liu, Qingtao.) | Li, Cong (Li, Cong.) | Peng, Yongzhen (Peng, Yongzhen.)

收录:

EI Scopus SCIE

摘要:

Nitrite -producing denitrification granular sludge (NPG) is emerging as a novel approach to employing anammox for cost-efficient nitrogen removal from high -strength nitrate -containing wastewater. However, the underlying impact of increasing stress of nitrite (NO2--N) accumulation on microbial metabolism and cooperation of denitrifying bacteria and heterotrophs in NPG was still not clear. This study first demonstrated a high -rate NPG system with elevating nitrate (NO3--N) from 52.4 mg/L to 613.2 mg/L. During this operation, a rapid increase in granular size from 322.8 mu m to 1124.0 mu m was observed with a relatively stable nitrate -to -nitrite transformation ratio (NTR) as high as 83.0 %, and effluent NO2--N of increasing from 16.5 mg/L to 331.9 mg/L. Such an increasing NO2--N stress improved the capability of the TCA cycle with rising intermediates of amino acid metabolism. This further stimulated the production of exocellular organic matter that replenished as electron donors and promoted the growth of granular size. The homogeneously spatial distribution of key bacteria (Thauera) surrounding the NPG with a calcium -dominated inorganic core inside was revealed to play a key role in enhanced substrate transfer capability. Genes nar and nap encoding NO3--N reductase dominated by key species belonging to Thauera showed much higher abundance than that encoding NO2--N reductase, which was the key reason for relatively stable NO2--N accumulation. It illustrated the excellent persistence of NPG to high NO2--N stress with special structure of functional bacteria inside granules, providing a great potential for the treatment of high -strength nitrate -containing wastewater.

关键词:

Metabolic mechanism NO2--N stress Microbial community NO 2--N accumulation sludge (NPG) Nitrite -production denitrification granular

作者机构:

  • [ 1 ] [Fan, Jiarui]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 2 ] [Du, Rui]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 3 ] [Liu, Qingtao]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 4 ] [Li, Cong]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 5 ] [Peng, Yongzhen]Beijing Univ Technol, Engn Res Ctr Beijing, Natl Engn Lab Adv Municipal Wastewater Treatment &, Beijing 100124, Peoples R China
  • [ 6 ] [Du, Rui]No 100 Pingleyuan, Beijing 100124, Peoples R China

通讯作者信息:

  • [Du, Rui]No 100 Pingleyuan, Beijing 100124, Peoples R China

电子邮件地址:

查看成果更多字段

相关关键词:

来源 :

CHEMICAL ENGINEERING JOURNAL

ISSN: 1385-8947

年份: 2024

卷: 481

1 5 . 1 0 0

JCR@2022

被引次数:

WoS核心集被引频次:

SCOPUS被引频次: 23

ESI高被引论文在榜: 5 展开所有

  • 2024-11
  • 2024-11
  • 2024-9
  • 2024-9
  • 2024-7

万方被引频次:

中文被引频次:

近30日浏览量: 0

归属院系:

在线人数/总访问数:303/4970313
地址:北京工业大学图书馆(北京市朝阳区平乐园100号 邮编:100124) 联系我们:010-67392185
版权所有:北京工业大学图书馆 站点建设与维护:北京爱琴海乐之技术有限公司