...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental research >Characteristics of denitrification in a vertical baffled bioreactor
【24h】

Characteristics of denitrification in a vertical baffled bioreactor

机译：垂直挡板生物反应器中脱氮特征

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A vertical baffled bioreactor (VBBR) was employed for tertiary denitrification. Its features were designed to minimize the demand for externally supplied electron donor by minimizing net biomass synthesis and oxygen respiration. Over a two-year period, complete denitrification was realized routinely in the VBBR. The nitrate-removal rate was proportion to the influent COD/N ratio, with complete denitrification possible for COD/N ratios >3 gCOD/gN. Batch kinetic tests carried out at the end of years 1 and 2 documented that supplied electron donor was oxidized in the first 1-2 h, but nitrate and nitrite reductions occurred predominantly after 2 h and were driven by internally stored electron donor. Measurements confirmed that the VBBR minimized the demand of added electron donor: The observed yield was only 0.05 mgVSS/mgCOD, and the COD demand for O_2 respiration was only 1-6.7% of the COD demand for N reductions. Biofilm samples taken from the upper and lower ports in cylinder of VBBR had similarly high alpha diversity and dominant genera, but the upper biofilm had a denitrification rate about 70% greater than the lower biofilm. The higher denitrification rate in the upper biofilm correlated its higher content of active biomass.
机译：采用垂直挡板的生物反应器（VBBR）用于叔脱氮。其特点是通过最小化净生物质合成和氧气呼吸来最小化对外部供应给电子供体的需求。在为期两年的时间内，在VBBR中常规实现完全脱氮。去除率与流动码/ N比的比例比例为COD / N比例的完全脱氮> 3 GCOD / GN。在第1和2年结束时进行的批次动力学测试记录在第一1-2h中，将供应的电子给体氧化在第一1-2h中，但在2小时后主要发生硝酸盐和亚硝酸盐还原，并且由内部储存的电子供体驱动。测量证实，VBBR最小化了添加的电子供体的需求：观察到的产率仅为0.05mgVSS / mgCod，对O_2呼吸的COD需求仅为N减少的COD需求的1-6.7％。从VBBR气缸中的上端口采取的生物膜样品具有同样的α多样性和占优势的属，但上部生物膜的反硝化率约为70％大于下生物膜。上生物膜的较高的脱氮率相关的活性生物质的含量较高。

著录项

  • 来源
    《Environmental research》 |2021年第2期|111046.1-111046.10|共10页
  • 作者

    Chong Tan; Qiuyu Zeng; Ge Zhu; Yanning Ning; Xiaohui Zhu; Peipei Zhang; Ning Yan; Yongming Zhang; Bruce E. Rittmann;

  • 作者单位

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Department of Environmental Engineering School of Environmental and Geographical Science Shanghai Normal University Shanghai 200234 PR China Yangtze Delta Wetland Ecosystem National Field Scientific Observation and Research Station PR China;

    Biodesign Swette Center for Environmental Biotechnology Arizona State University Tempe AZ 85287-5701 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Bioreactor; Denitrification; Biofilm; Electron donor;

    机译：生物反应器;反硝化;生物膜;电子捐赠者;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号