TY - JOUR
T1 - Ammonium-assimilating microbiome
T2 - A halophilic biosystem rationally optimized by carbon to nitrogen ratios with stable nitrogen conversion and microbial structure
AU - Zhang, Mengru
AU - Han, Fei
AU - Liu, Zhe
AU - Han, Yufei
AU - Li, Yuke
AU - Zhou, Weizhi
PY - 2022
Y1 - 2022
N2 - The contradiction between theoretical metabolism of ammonium assimilation and experiential understanding of conventional biosystems makes the rational optimization of the ammonium-assimilating microbiome through carbon to nitrogen (C/N) ratios perplexing. The effect of different C/N ratios on ammonium-assimilating biosystems was investigated in saline wastewater treatment. C/N ratios significantly hindered the nutrient removal efficiency, but ammonium-assimilating biosystems maintained functional stability in nitrogen conversions and microbial communities. With sufficient biomass, higher than 86% ammonium and 73% phosphorus were removed when C/N ratios were higher than 25. Ammonium assimilation dominated the nitrogen metabolism in all biosystems even under relatively low C/N ratios, evidenced by the extremely low abundances of nitrification functional genes. Different C/N ratios did not significantly change the bacterial community structure of ammonium-assimilating biosystems. It is anticipated that the ammonium-assimilating biosystem with advantages of clear metabolic pathway and easy optimization can be applied to nutrient removal and recovery in saline environments.
AB - The contradiction between theoretical metabolism of ammonium assimilation and experiential understanding of conventional biosystems makes the rational optimization of the ammonium-assimilating microbiome through carbon to nitrogen (C/N) ratios perplexing. The effect of different C/N ratios on ammonium-assimilating biosystems was investigated in saline wastewater treatment. C/N ratios significantly hindered the nutrient removal efficiency, but ammonium-assimilating biosystems maintained functional stability in nitrogen conversions and microbial communities. With sufficient biomass, higher than 86% ammonium and 73% phosphorus were removed when C/N ratios were higher than 25. Ammonium assimilation dominated the nitrogen metabolism in all biosystems even under relatively low C/N ratios, evidenced by the extremely low abundances of nitrification functional genes. Different C/N ratios did not significantly change the bacterial community structure of ammonium-assimilating biosystems. It is anticipated that the ammonium-assimilating biosystem with advantages of clear metabolic pathway and easy optimization can be applied to nutrient removal and recovery in saline environments.
KW - Ammonium assimilation
KW - Ammonium-assimilating biosystems
KW - Bacterial community
KW - C/N ratios
KW - Saline wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85125652807&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2022.126911
DO - 10.1016/j.biortech.2022.126911
M3 - Article
C2 - 35231594
AN - SCOPUS:85125652807
VL - 350
JO - Bioresource Technology
JF - Bioresource Technology
SN - 0960-8524
M1 - 126911
ER -
