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 Technoljournal_title
Bioresource technologyauthors
Gonzalez-Martinez A,Muñoz-Palazon B,Maza-Márquez P,Rodriguez-Sanchez A,Gonzalez-Lopez J,Vahala Rdoi
10.1016/j.biortech.2018.01.147subject
Has Abstractpub_date
2018-05-01 00:00:00pages
22-29eissn
0960-8524issn
1873-2976pii
S0960-8524(18)30169-Xjournal_volume
256pub_type
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