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Shubiao Wu

The performance efficiency of bioaugmentation to prevent anaerobic digestion failure from ammonia and propionate inhibition

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  • Ying Li, China Agricultural University, Chinese Academy of Sciences
  • ,
  • Yue Zhang, University Hospital Southampton
  • ,
  • Yongming Sun, Chinese Academy of Sciences
  • ,
  • Shubiao Wu
  • Xiaoying Kong, Chinese Academy of Sciences
  • ,
  • Zhenhong Yuan, Chinese Academy of Sciences
  • ,
  • Renjie Dong, China Agricultural University

This study aims to investigate the effect of bioaugmentation with enriched methanogenic propionate degrading microbial consortia on propionate fermentation under ammonia stress from total ammonia nitrogen concentration (TAN) of 3.0 g N L−1. Results demonstrated that bioaugmentation could prevent unstable digestion against further deterioration. After 45 days of 1 dosage (0.3 g dry cell weight L−1 d−1, DCW L−1 d−1) of bioaugmentation, the average volumetric methane production (VMP), methane recovery rate and propionic acid (HPr) degradation rate was enhanced by 70 mL L−1 d−1, 21% and 51%, respectively. In contrast, the non-bioaugmentation reactor almost failed. Routine addition of a double dosage (0.6 g DCW L−1 d−1) of bioaugmentation culture was able to effectively recover the failing digester. The results of FISH suggested that the populations of Methanosaetaceae increased significantly, which could be a main contributor for the positive effect on methane production.

OriginalsprogEngelsk
TidsskriftBioresource Technology
Vol/bind231
Sider (fra-til)94-100
Antal sider7
ISSN0960-8524
DOI
StatusUdgivet - 2017
Eksternt udgivetJa

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