Journal
BIORESOURCE TECHNOLOGY
Volume 387, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2023.129612
Keywords
Anammox; Inoculation relative abundance; Biofilm formation; Overall migration; Microbial interaction
Ask authors/readers for more resources
Two mature anaerobic ammonium oxidation (anammox) consortia, with high and low relative abundance of anammox bacteria, were used for rapid sludge proliferation and biofilm formation. UASB2 showed a nitrogen removal efficiency of 90.94% after 120 days of operation, which was 13% higher than UASB1. The relative abundances of genes involved in anammox transformation and carbon metabolism were higher in UASB2, indicating the importance of microbial interactions in anammox sludge proliferation and biofilm formation.
Two mature anaerobic ammonium oxidation (anammox) consortia with high/low relative abundance of anammox bacteria were inoculated for the rapid sludge proliferation and biofilm formation in this study, named up-flow anaerobic sludge blanket reactor (UASB1) (high) and UASB2 (low), respectively. Results showed that the nitrogen removal efficiency of UASB2 reached 90.94% after the 120-day operation, which was 13% higher than that of UASB1. Moreover, its biomass amounts were 22.18% (biofilm) and 40.96% (flocs) higher than that of UASB1, respectively. Ca. Kuenenia possessed relative abundances of 29.32% (flocs), 27.42% (biofilm) and 31.56% (flocs), 35.20% (biofilm) in the UASB1 and UASB2, respectively. The relative abundances of genes involved in anammox transformation (hzs, nir) and carbon metabolism (fdh, lgA/B/C, acs) were higher in the UASB2, indicating that Ca. Kuenenia might produce acetate and glycogen to enhance microbial interactions. These findings emphasized the importance of microbial interactions in anammox sludge proliferation and biofilm formation.
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