Formation characteristics of algal-bacteria granular sludge under low-light environment: From sludge characteristics, extracellular polymeric substances to microbial community

Liu, Zhe; Wang, Jingwen; Zhang, Shumin; Hou, Yiwen; Wang, Jiaxuan; Gao, Min; Chen, Xingdu; Zhang, Aining; Liu, Yongjun; Li, Zhihua

doi:10.1016/j.biortech.2023.128851

Cited by 21 publications

(1 citation statement)

References 44 publications

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“…Dechloromonas is particularly abundant in biological phosphorus removal systems of WWTPs (Petriglieri et al 2021), where is prone to develop biofilm on metal surfaces (Li et al 2020) and polymers (Shen et al 2016). Zoogloe encompasses denitrifying bacteria (Zhang et al 2023) and has been found as in important component of the algal-bacteria granular sludge (Liu et al 2023). It can exist in aggregate form (Chakraborty et al 2011) contributing to the development of biofilm on various polymers (Shen et al 2013; Walczak et al 2015; Fang et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Zooplankton impacts on the persistence of the anthropogenic pollution markerintI1 in lake water

Borgomaneiro,

Cesare,

Callieri

et al. 2024

Preprint

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Wastewater treatment plants (WWTP) effluents can release microbiological pollutants, including the intI1 gene (integrases of class 1 integrons), which has been proposed as a target for monitoring anthropogenic pollution in surface waters. This gene has also a strong correlation with antibiotic resistance, making of it an important proxy to evaluate the level of genetic contamination in aquatic environments. he ecological factors that influence the abundance and dynamics of intI1 within natural water bodies are largely unknown. To better understand the fate of class 1 integrons in aquatic systems, we resorted to classical limnological monitoring of intI1 over multiple years. We also conducted experiments to elucidate the impact of Daphnia grazing on its abundance. The monitoring of different size fractions of the Lake Maggiore microbial community has shown a particle-bound life-style for intI1-harbouring bacteria. Most of the bacteria hosting intI1, originating from both a wastewater effluent that discharges intro Lake Maggiore and lake water itself, grow on particulate substrates in open waters, making them particularly vulnerable to grazing by large filter feeders such as Daphnia. Daphnia grazing is independent from the origin (lake water or wastewater) of the bacterial genera; it selectively removes bacteria that are present in aggregates or even filamentous forms from both origins. To understand if intI1 is related to viable bacteria or just DNA residues, it is important to study the persistence of class 1 integrons with their gene cassettes, which often contain antibiotic resistance genes in freshwater ecosystems.

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Section: Discussionmentioning

confidence: 99%

Zooplankton impacts on the persistence of the anthropogenic pollution markerintI1 in lake water

Borgomaneiro,

Cesare,

Callieri

et al. 2024

Preprint

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show abstract

Zooplankton grazing reduces the persistence of an anthropogenic pollution marker in lake water

Borgomaneiro,

Di Cesare,

Callieri

et al. 2024

Limnology & Oceanography

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Wastewater treatment plant effluents release microbiological pollutants, including the intI1 gene (integrases of class 1 integron), which has been proposed as a target for monitoring anthropogenic pollution in surface waters. This gene correlates with antibiotic resistance genes, making it an important proxy for genetic contamination in aquatic environments. It is currently unclear whether intI1 found in lake water is mainly present due to continuous seeding or if autochthonous bacteria harbor this gene. To better understand the fate and dynamics of class 1 integrons in aquatic systems, we resorted to classical limnological monitoring of intI1 (qPCR) over multiple years in three different size fractions: free‐living bacteria, particle‐attached bacteria, and zooplankton‐attached bacteria. We also conducted experiments to elucidate the impact of grazers on the abundance of intI1. The monitoring of different size fractions of the Lake Maggiore microbial community showed a particle‐bound lifestyle for intI1‐hosting bacteria. Most of these bacteria originated from both a wastewater effluent that discharges into Lake Maggiore and the lake water itself (amplicon sequencing). We hypothesize that these bacteria grow on particles in open waters, making them particularly vulnerable to grazing by large filter feeders such as Daphnia. Therefore, the presence of Daphnia reduced the abundance of intI1 in lake water, whereas this was not true for other grazers such as Rotaria macrura or Poterioochromonas sp. Our study shows that the food web structure and temporal changes in the lake influence the abundance of intI1 and consequently the assessment of anthropogenic pollution.

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Algae-Bacterial Aerobic Granular Sludge for Surfactant-Laden Saline Industrial Wastewater Treatment: A Sustainable Approach

Ezz,

Nasr,

Fujii

et al. 2024

Environmental Science and Engineering

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Formation characteristics of algal-bacteria granular sludge under low-light environment: From sludge characteristics, extracellular polymeric substances to microbial community

Cited by 21 publications

References 44 publications

Zooplankton impacts on the persistence of the anthropogenic pollution markerintI1 in lake water

Zooplankton impacts on the persistence of the anthropogenic pollution markerintI1 in lake water

Zooplankton grazing reduces the persistence of an anthropogenic pollution marker in lake water

Algae-Bacterial Aerobic Granular Sludge for Surfactant-Laden Saline Industrial Wastewater Treatment: A Sustainable Approach

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