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Author:

Liang, Hui-Kai (Liang, Hui-Kai.) | Cui, You-Wei (Cui, You-Wei.) | Li, Zhen-Ying (Li, Zhen-Ying.) | Yan, Hui-Juan (Yan, Hui-Juan.) | Wang, Xu (Wang, Xu.)

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Abstract:

Fungal overgrowth in halophilic aerobic granular sludge (HAGS) is a severe problem, leading to granule disintegration. However, it is still mostly unclear how to control fungal overgrowth. This study explored the effects of carbon availability in saline wastewater with a salinity of 20 g/L on fungal and bacterial population sizes, community compositions, and network interactions in HAGS by manipulating different carbon-to‑nitrogen ratios (C/N). Bacterial population size increased from 6.42 × 106 copies/ng DNA to 8.67 × 106 copies/ng DNA as the C/N ratio increased from 4 to 20. In contrast, fungal population size decreased from 1.24 × 106 copies/ng DNA to 8.05 × 103 copies/ng DNA. The maximum removal rate of ammonia by fungi decreased from 5.02 ± 0.04 mg·L−1·h−1 to 1.72 ± 0.30 mg·L−1·h−1. Nitrosomonas, Thauera, and Planktosalinus competed for nutrients with the dominant fungi Cosmospora, being in antagonism. Carbon availability in the saline wastewater could regulate the population of bacteria and fungi, laying a theoretical foundation for controlling HAGS disintegration. © 2024 Elsevier B.V.

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Author Community:

  • [ 1 ] [Liang, Hui-Kai]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 2 ] [Cui, You-Wei]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 3 ] [Li, Zhen-Ying]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 4 ] [Yan, Hui-Juan]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 5 ] [Wang, Xu]National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing; 100124, China
  • [ 6 ] [Wang, Xu]Beijing Municipal Research Institute of Eco-Environmental Protection, National Engineering Research Center for Urban Environmental Pollution Control, Beijing; 100037, China

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Source :

Science of the Total Environment

ISSN: 0048-9697

Year: 2024

Volume: 955

9 . 8 0 0

JCR@2022

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ESI Highly Cited Papers on the List: 0 Unfold All

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30 Days PV: 0

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