A Simultaneous Denitrification and Fermentation Process for Nitrate Removal in a Whiteleg Shrimp (Litopenaeus vannamei) Recirculating Aquaculture System: Using Endogenous Carbon from a Biofilm

文献类型： 外文期刊

第一作者： Li, Yayuan

作者： Li, Yayuan;Lu, Shimin;Zhang, Wang;Liu, Xingguo;Liu, Chong;Yuan, Zehui;Li, Yayuan;Zhang, Wang;Yuan, Zehui;Li, Yayuan;Lu, Shimin;Zhang, Wang;Liu, Xingguo;Liu, Chong;Yuan, Zehui;Jiang, Haixin

作者机构：

关键词： heterotrophic denitrification; N-15-tracer technique; recirculating aquaculture system; Nitrospira; endogenous carbon from the biofilm

期刊名称：JOURNAL OF MARINE SCIENCE AND ENGINEERING （ 影响因子：2.9； 五年影响因子：2.9 ）

ISSN：

年卷期： 2023 年 11 卷 12 期

页码：

收录情况： SCI

摘要： During the process of circulating aquaculture, high concentrations of nitrate will accumulate. A simultaneous denitrification and fermentation process is described to remove nitrate from a recirculating aquaculture system using endogenous carbon on a biofilm. N-15 isotope technology was used to assess the nitrate removal, mainly through heterotrophic denitrification. The nitrate removal rate could be as high as 98.97%, with a final concentration of nitrate below 1 mg/L. The denitrification process obeys a Michaelis-Menten-type enzyme kinetic model, with a half saturation constant of 99.91 mg/L and a maximum nitrate removal rate of 0.39 mg L-1 h(-1) at 28 C-degrees. The functional genes narG and narH for nitrate removal were obtained from Nitrospirae spp. at proportions of 39.13% and 26.16%, respectively. The acetate, propionate and iso-valerate produced by anaerobic fermentation provided the principal electron donors for denitrification.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序