Journal
BIORESOURCE TECHNOLOGY
Volume 231, Issue -, Pages 94-100Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.01.068
Keywords
Bioaugmentation; Ammonia inhibition; Propionate degradation; Propionate-oxidizing bacteria; Microbial community
Funding
- Science and Technology Service Network Initiative [KFJ-Ew-STS-138]
- EU FP7 ECOFUEL [246772]
Ask authors/readers for more resources
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. (C) 2017 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available