In:
International Journal of Biology and Life Sciences, Darcy & Roy Press Co. Ltd., Vol. 2, No. 3 ( 2023-05-20), p. 77-83
Abstract:
A modified pilot plant with two sequencing batch reactors on the strength of utilizing the inner carbon supply and adding suspended carriers was operated for 280 d to analyze nitrogen removal performance and microorganism community. Despite a low chemical oxygen demand (COD)/total nitrogen (TN) ratio of 3.5, the TN in the effluent decreased from 37.2 to 10.4 mg N/L. High-throughput sequencing indicated significant differences in the abundance of the phylum Actinobacteria (p 〈 0.0001), Firmicutes (p 〈 0.0001), Bacteroidetes (p 〈 0.001), Uroviricota (p 〈 0.0001) and Planctomycetes (p 〈 0.0001) between the anoxic-carrier biofilms and flocculent sludge. Quantitative PCR revealed that denitrification and anammox genes were additional abundant in the anoxic-carrier biofilms than flocculent sludge (narG: p 〈 0.0001; nirS: p 〈 0.01; narH: p 〈 0.01; norB: p 〈 0.0001; hzsB: p 〈 0.01; hdh: p 〈 0.01). Thus, enrichment with denitrification and anammox bacteria might improve nitrogen removal; this was supported by KEGG pathway annotation. Collectively, this study suggests that anoxic-carrier biofilms might enhance nitrogen removal through partial denitrification and anammox process in CWWTPs.
Type of Medium:
Online Resource
ISSN:
2957-9511
DOI:
10.54097/ijbls.v2i3.8658
Language:
Unknown
Publisher:
Darcy & Roy Press Co. Ltd.
Publication Date:
2023
