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  • 副教授
  • 硕士生导师
  • 教师拼音名称:Gong Miao
  • 入职时间:2017-01-11
  • 所在单位:土木与水利工程学院 市政工程系
  • 学历:博士研究生毕业
  • 办公地点:土木楼419
  • 性别:
  • 学位:工学博士学位
  • 在职信息:在职
  • 毕业院校:河海大学
  • 学科:环境工程
    市政工程
论文成果
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Influence of reaction parameters on the fate of nitrogen during the supercritical water gasification of dewatered sewage sludge
  • DOI码:10.1016/j.wasman.2022.07.034
  • 发表刊物:Waste Management
  • 摘要:This study investigated the effects of different parameters on the fate of nitrogen (N) in products after supercritical water gasification (SCWG) of dewatered sewage sludge (DSS). N distribution and morphology were most affected by temperature, followed by reaction time and heating rate, while reaction pressure had little effect on them. In terms of specific performance, higher temperature, longer reaction time, and slower heating rate were beneficial to the increase of NH4+-N content in the liquid phase. Compared with raw sludge, after SCWG, the solid phase contained more inorganic-N and less protein-N, a certain proportion of quaternary-N and nitrile-N. The proportion of N-containing compounds in the biocrude phase was between 0.26%–20.34%, suggesting the importance of more research on N in the biocrude phase. The recovery rate of N in all samples was between 64.34%–93.82%. The major proportion of N (42.27%–60.91%) was transformed into the liquid phase, while the remaining entered the solid phase (10.54%–21.45%) and the biocrude phase (6.18%–15.78%). These findings are helpful to better understand the principle of N distribution in products of DSS after SCWG and provide some new ideas for reducing N-containing by-product formation in the future.
  • 卷号:151
  • 期号:0
  • 页面范围:28-38
  • 是否译文:
  • 发表时间:2022-08-01
  • 收录刊物:SCI
  • 发布期刊链接:https://www.sciencedirect.com/science/article/pii/S0956053X22003877