Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7067802 | Bioresource Technology | 2018 | 33 Pages |
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 3â¯Â°C of temperature using a cold-adapted sludge from Lapland. At 5â¯Â°C, it yielded acceptable conversion rates, in terms of nitrogen, phosphorous, and organic matter. However, under 3â¯Â°C a negligible nitrogen and phosphorous removal performance was observed. Below 5â¯Â°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 3â¯months (winter season) under 5â¯Â°C of water temperature.
Related Topics
Physical Sciences and Engineering
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Authors
Alejandro Gonzalez-Martinez, Barbara Muñoz-Palazon, Paula Maza-Márquez, Alejandro Rodriguez-Sanchez, Jesus Gonzalez-Lopez, Riku Vahala,