Performance and microbial community structure of a polar Arctic Circle aerobic granular sludge system operating at low temperature.

Abstract:

:The aim of this work was to study the performance and microbial community structure of a polar Arctic Circle aerobic granular sludge (AGS) system operating at low temperature. Thus, an AGS bioreactor was operated at 7, 5 and 3 °C of temperature using a cold-adapted sludge from Lapland. At 5 °C, it yielded acceptable conversion rates, in terms of nitrogen, phosphorous, and organic matter. However, under 3 °C a negligible nitrogen and phosphorous removal performance was observed. Below 5 °C, scanning electron microscopy studies showed a wispy, non-dense and irregular granular structure with a strong outgrowth of filamentous. Moreover, Illumina next-generation sequencing showed a heterogeneous microbial population where SM1K20 (Archaea), Trichosporon domesticum (Fungus), and Zooglea, Arcobacter and Acinetobacter (Bacteria) were the dominant phylotypes. Our study suggests that AGS technologies inoculated with North Pole sludge could be operated, in cold regions for a period longer than 3 months (winter season) under 5 °C of water temperature.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Gonzalez-Martinez A,Muñoz-Palazon B,Maza-Márquez P,Rodriguez-Sanchez A,Gonzalez-Lopez J,Vahala R

doi

10.1016/j.biortech.2018.01.147

subject

Has Abstract

pub_date

2018-05-01 00:00:00

pages

22-29

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(18)30169-X

journal_volume

256

pub_type

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