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Title: Removal mechanisms of phosphorus in non-aerated microalgal-bacterial granular sludge process
Authors: Ji, Bin
Zhang, Meng
Wang, Li
Wang, Shulian
Liu, Yu
Keywords: Engineering::Environmental engineering
Issue Date: 2020
Source: Ji, B., Zhang, M., Wang, L., Wang, S. & Liu, Y. (2020). Removal mechanisms of phosphorus in non-aerated microalgal-bacterial granular sludge process. Bioresource Technology, 312, 123531-.
Journal: Bioresource Technology 
Abstract: Microalgal-bacterial granular sludge processes are attracting increasing research interest in fields of biological municipal wastewater treatment. However, these processes currently suffer from inefficient phosphorus removal and long hydraulic reaction time. As such, a self-sustaining synergetic microalgal-bacterial granular sludge process was explored for improving phosphorus removal. Results showed that about 86% of influent phosphorus could be removed within 6 h comprising 2-hr dark phase and 4-hr light phase. Slight phosphorus release was observed in dark phase, followed by a significant phosphorus uptake in light phase together with the accumulation of poly-phosphorus in microalgal cells. The analyses by PacBio's sequencing and fluorescence in situ hybridization revealed that microalgal genus of Pantanalinema were the major phosphorus-accumulating organisms. Based on these experimental observations, the removal mechanisms of phosphorus by microalgal-bacterial granular sludge process were identified. It is expected that this study may shed lights on the pathways of biological phosphorus removal in microalgal-bacterial granular sludge process.
ISSN: 0960-8524
DOI: 10.1016/j.biortech.2020.123531
Schools: School of Civil and Environmental Engineering 
Research Centres: Nanyang Environment and Water Research Institute 
Rights: © 2020 Elsevier Ltd. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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