Aerobic denitrifying bacterial communities drive nitrate removal: Performance, metabolic activity, dynamics and interactions of core species.

Abstract:

:Three novel mix-cultured aerobic denitrifying bacteria (Mix-CADB) consortia named D14, X21, and CL exhibited excellent total organic carbon (TOC) removal and aerobic denitrification capacities. The TOC and nitrate removal efficiencies were higher than 93.00% and 98.00%. The results of Biolog demonstrated that three communities displayed high carbon metabolic activity. nirS gene sequencing and ecological network model revealed that Pseudomonas stutzeri, Paracoccus sp., and Paracoccus denitrificans dominated in the D14, X21, and CL communities. The dynamics and co-existence of core species in communities drove the nutrient removal. Response surface methodology showed the predicted total nitrogen removal efficiency reached 99.43% for D14 community. The three Mix-CADB consortia have great potential for nitrogen-polluted aquatic water treatment because of their strong adaptability and removal performance. These results will provide new understanding of co-existence, interaction and dynamics of Mix-CADB consortia for nitrogen removal in nitrogen-polluted aquatic ecosystems.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Li S,Zhang H,Huang T,Ma B,Miao Y,Shi Y,Xu L,Liu K,Huang X

doi

10.1016/j.biortech.2020.123922

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

123922

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(20)31194-9

journal_volume

316

pub_type

杂志文章