TY - JOUR
T1 - Performance and microbial community structure of a polar Arctic Circle aerobic granular sludge system operating at low temperature
AU - Gonzalez-Martinez, Alejandro
AU - Muñoz-Palazon, Barbara
AU - Maza-Márquez, Paula
AU - Rodriguez-Sanchez, Alejandro
AU - Gonzalez-Lopez, Jesus
AU - Vahala, Riku
PY - 2018/5/1
Y1 - 2018/5/1
N2 - 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.
AB - 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.
KW - Aerobic granular sludge
KW - Low temperature
KW - Massive parallel sequencing
KW - North Pole
KW - Wastewater treatment
UR - http://www.scopus.com/inward/record.url?scp=85041397296&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2018.01.147
DO - 10.1016/j.biortech.2018.01.147
M3 - Article
AN - SCOPUS:85041397296
SN - 0960-8524
VL - 256
SP - 22
EP - 29
JO - Bioresource Technology
JF - Bioresource Technology
ER -
