Start-up of anammox in an up-flow anaerobic sludge bed reactor: bacterial community composition and antibiotic resistance genes DOI Creative Commons
Xin Li, Junqin Yao, Yangyang Jia

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Июнь 13, 2024

Abstract Anaerobic ammonia oxidation (anammox) is considered a high-efficiency and low-consumption biological nitrogen removal process. In this study, synthetic wastewater was used to start an up-flow anaerobic sludge bed reactor with starting temperature of 20–31℃, subsequently, the activated samples were analyze changes in bacterial community antibiotic resistance genes (ARGs) by metagenomic sequencing. The results showed that reaction successfully started up after 132 days cultivation, achieving NH4+-N NO2−-N rates over 99.5%. Candidatus Kuenenia, anammox bacterium, increased from 0.01 50.86%. denitrifying bacteria Delftia, Acidovorax, Thauera Alicycliphilus decreased 18.70, 8.02, 4.94 4.59% 7.01, 1.77, 3.06 3.96%, respectively. ammonia-oxidizing bacterium Nitrosomonas 2.91 1.87%. After relative abundance ARGs 90.23 64.29 ppm, sulfonamide, macrolide-lincosamide-streptogramin, tetracycline, aminoglycoside multidrug being main types. Additionally, ARG subtypes sul1, msrE tetX decreased, while ermF, sul2 floR increased. These contribute knowledge performance, composition reactor, providing guidance for anammox.

Язык: Английский

Start-up of anammox in an up-flow anaerobic sludge bed reactor: bacterial community composition and antibiotic resistance genes DOI Creative Commons
Xin Li, Junqin Yao, Yangyang Jia

и другие.

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Июнь 13, 2024

Abstract Anaerobic ammonia oxidation (anammox) is considered a high-efficiency and low-consumption biological nitrogen removal process. In this study, synthetic wastewater was used to start an up-flow anaerobic sludge bed reactor with starting temperature of 20–31℃, subsequently, the activated samples were analyze changes in bacterial community antibiotic resistance genes (ARGs) by metagenomic sequencing. The results showed that reaction successfully started up after 132 days cultivation, achieving NH4+-N NO2−-N rates over 99.5%. Candidatus Kuenenia, anammox bacterium, increased from 0.01 50.86%. denitrifying bacteria Delftia, Acidovorax, Thauera Alicycliphilus decreased 18.70, 8.02, 4.94 4.59% 7.01, 1.77, 3.06 3.96%, respectively. ammonia-oxidizing bacterium Nitrosomonas 2.91 1.87%. After relative abundance ARGs 90.23 64.29 ppm, sulfonamide, macrolide-lincosamide-streptogramin, tetracycline, aminoglycoside multidrug being main types. Additionally, ARG subtypes sul1, msrE tetX decreased, while ermF, sul2 floR increased. These contribute knowledge performance, composition reactor, providing guidance for anammox.

Язык: Английский

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