首页> 外文期刊>Biotechnology Progress >Process performance and bacterial community dynamics of partial-nitritation biofilters subjected to different concentrations of cysteine amino acid
【24h】

Process performance and bacterial community dynamics of partial-nitritation biofilters subjected to different concentrations of cysteine amino acid

机译:不同浓度半胱氨酸氨基酸对部分硝化生物滤池的处理性能和细菌群落动态

获取原文
获取原文并翻译 | 示例
           

摘要

Partial-nitritation processes are used for the biological treatment of high nitrogen-low organic carbon effluents, such as anaerobic digestion reject water. The release of certain products generated during the anaerobic digestion process, such as amino acids, could potentially reduce the performance of these partial-nitritation bioprocesses. To investigate this, four partial-nitritation biofilters were subjected to continuous addition of 0, 150, 300, and 500 mgL(-1) cysteine amino acid in their influents. The addition of the amino acid had an impact over the performance of the partial-nitritation process and the bacterial community dynamics of the systems analyzed. Ammonium oxidation efficiency decreased with the addition of the amino acid, and a net nitrogen elimination occurred in presence of cysteine through the operation period. Bacterial community dynamics showed a decrease of Nitrosomonas species and a proliferation of putative heterotrophs with nitrification capacity, such as Pseudomonas, or denitrification capacity, such as Denitrobacter or Alicycliphilus. The addition of cysteine irreversible affected the bioreactors, which could not achieve the performance obtained before the addition of the amino acid. A mathematical predictive equation of the process performance depending on cysteine concentration added and operational time under such concentration was developed. (c) 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:1254-1263, 2016
机译:部分硝化工艺用于生物处理高氮低有机碳废水,例如厌氧消化废水。厌氧消化过程中产生的某些产物(例如氨基酸)的释放可能会降低这些部分硝化生物过程的性能。为了对此进行调查,对四个部分硝化生物滤池的进水液进行了连续添加0、150、300和500 mgL(-1)半胱氨酸氨基酸的处理。氨基酸的添加对部分硝化过程的性能和所分析系统的细菌群落动力学有影响。随着氨基酸的添加,铵的氧化效率降低,并且在整个操作期间,在存在半胱氨酸的情况下发生了净氮消除。细菌群落动态显示亚硝化单胞菌种类减少,并且具有硝化能力的假想异养菌(如假单胞菌)或反硝化能力(如反硝化细菌或嗜脂菌)增殖。半胱氨酸不可逆的添加影响了生物反应器,其无法实现添加氨基酸之前获得的性能。建立了取决于添加的半胱氨酸浓度和在该浓度下的操作时间的过程性能的数学预测方程。 (c)2016美国化学工程师学会生物技术学会。 Prog。,32:1254-1263,2016

著录项

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