Unclassified Anammox bacterium responds to robust nitrogen removal in a sequencing batch reactor fed with landfill leachate

TY - JOUR

T1 - Unclassified Anammox bacterium responds to robust nitrogen removal in a sequencing batch reactor fed with landfill leachate

AU - Huang, Xiaowu

AU - Mi, Wenkui

AU - Ito, Hiroaki

AU - Kawagoshi, Yasunori

N1 - Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/11

Y1 - 2020/11

N2 - Treatment of landfill leachate was conducted in a lab-scale sequencing batch reactor (SBR). The SBR was started through inoculating activated sludge with controlling dissolved oxygen of 0.5–1.0 mg/L. Anammox reaction took place within around three months. The SBR established robust nitrogen removal with incremental NLRs of 0.25–2.17 kg N/m3/d. At the final phase, it achieved elevated nitrogen removals of 1.68–1.91 kg N/m3/d. 16S rRNA gene amplicon sequencing analysis revealed Nitrosomonas, unclassified Anammox bacterium, and diverse denitrifying populations coexisted and accounted for 4.02%, 20.05% and 34.69%, respectively. Phylogenic analysis and average nucleotide identity comparison jointly suggested the unclassified Anammox bacterium potentially pertained to a novel Anammox lineage. The functional profiles’ prediction suggested sulfate reduction, arsenate reduction and eliminations of antibiotics and drugs likely occurred in the SBR. The finding from this study suggests contribution of unclassified Anammox bacteria in influencing nitrogen budget in natural and engineering systems is currently being underestimated.

AB - Treatment of landfill leachate was conducted in a lab-scale sequencing batch reactor (SBR). The SBR was started through inoculating activated sludge with controlling dissolved oxygen of 0.5–1.0 mg/L. Anammox reaction took place within around three months. The SBR established robust nitrogen removal with incremental NLRs of 0.25–2.17 kg N/m3/d. At the final phase, it achieved elevated nitrogen removals of 1.68–1.91 kg N/m3/d. 16S rRNA gene amplicon sequencing analysis revealed Nitrosomonas, unclassified Anammox bacterium, and diverse denitrifying populations coexisted and accounted for 4.02%, 20.05% and 34.69%, respectively. Phylogenic analysis and average nucleotide identity comparison jointly suggested the unclassified Anammox bacterium potentially pertained to a novel Anammox lineage. The functional profiles’ prediction suggested sulfate reduction, arsenate reduction and eliminations of antibiotics and drugs likely occurred in the SBR. The finding from this study suggests contribution of unclassified Anammox bacteria in influencing nitrogen budget in natural and engineering systems is currently being underestimated.

KW - Landfill leachate

KW - Nitrogen removal

KW - SBR

KW - Unclassified Anammox bacterium

UR - http://www.scopus.com/inward/record.url?scp=85089241168&partnerID=8YFLogxK

U2 - 10.1016/j.biortech.2020.123959

DO - 10.1016/j.biortech.2020.123959

M3 - 文章

C2 - 32795870

AN - SCOPUS:85089241168

SN - 0960-8524

VL - 316

JO - Bioresource Technology

JF - Bioresource Technology

M1 - 123959

ER -