Distinct responses of aerobic granular sludge sequencing batch reactors to nitrogen and phosphorus deficient conditions

Xu, Peng; Xie, Zhiyi; Shi, Liangsheng; Yan, Xiaohui; Fu, Zhidong; Ma, Jingwei; Zhang, Wei; Wang, Hongyu; Xu, Baokun; He, Qiulai

doi:10.1016/j.scitotenv.2022.155369

Cited by 24 publications

(4 citation statements)

References 45 publications

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“…In both treatments, EPS made up 17% of the total biomass, which is in accordance with previously observed values (Abouhend et al, 2018;Milferstedt et al, 2017;Trebuch et al, 2020). Unlike aerobic granules under nitrogen limitation (Xu et al, 2022;Yin et al, 2019), N− photogranules exhibited a high PN:PS ratio that still showed to favor granular aggregation. However, since only the total EPS was evaluated for N+ and N− photogranules, there might have been a change in loosely and tightly bound EPS constituents that were not assessed here (Jia et al, 2017).…”

Section: Biomass Productivity and Composition Of Photogranules Under ...supporting

confidence: 90%

“…Nitrogen limitation in granular sludge systems is often associated with a decrease of wastewater treatment performance and disintegration of granule morphology (Fang et al, 2009; Xu et al, 2022; Yin et al, 2019). This is due to the limitation of nitrogen for growth of microorganisms (amino acid synthesis) and a decrease of proteinaceous extracellular polymeric substances (EPS) constituents important for successful granulation.…”

Section: Introductionmentioning

confidence: 99%

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N₂‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

Trebuch

Schoofs

Vaessen

et al. 2023

Biotech & Bioengineering

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Wastewater characteristics can vary significantly, and in some municipal wastewaters the N:P ratio is as low as 5 resulting in nitrogen-limiting conditions. In this study, the microbial community, function, and morphology of photogranules under nitrogen-replete (N+) and limiting (N−) conditions was assessed in sequencing batch reactors. Photogranules under N− condition were nitrogen deprived 2/3 of a batch cycle duration. Surprisingly, this nitrogen limitation had no adverse effect on biomass productivity. Moreover, phosphorus and chemical oxygen demand removal were similar to their removal under N+ conditions. Although performance was similar, the difference in granule morphology was obvious. While N+ photogranules were dense and structurally confined, N− photogranules showed loose structures with occasional voids. Microbial community analysis revealed high abundance of cyanobacteria capable of N 2 -fixation. These were higher at N− (38%) than N+ (29%) treatments, showing that photogranules could adjust and maintain treatment performance and high biomass productivity by means of N 2 -fixation.

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Section: Biomass Productivity and Composition Of Photogranules Under ...supporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

N₂‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

Trebuch

Schoofs

Vaessen

et al. 2023

Biotech & Bioengineering

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“…Seasonal factors at the Österröd AGS plant include temperature, a summer tourist season with increased loads of nutrients, rainy periods with high flows in autumn and winter, and sometimes snowmelt in early spring resulting in higher flows and temperature drops. Nutrient concentrations and temperature have been found to play key roles in the microbial community assembly of AGS, 23,58 and were likely involved in the observed seasonal pattern. Seasonal variability has also been identified as an important factor shaping activated sludge communities.…”

Section: Discussionmentioning

confidence: 96%

Full-scale aerobic granular sludge for municipal wastewater treatment – granule formation, microbial succession, and process performance

Ekholm

Persson

Blois

et al. 2022

Environ. Sci.: Water Res. Technol.

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“…Similar results were observed in aquaculture wastewater treatment systems utilizing PBS and PHBV as slow-release carbon sources 1,13 . Proteobacteria and Bacteroidetes play an important role in biodegradation of organic compounds 33 , which includes denitrification 34,35 . The Proteobacteria also accumulate phosphorus, thereby contributing to phosphorus removal from water 36 .…”

Section: Microbial Community Diversity and Composition In Culture Systemmentioning

confidence: 99%

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

Xia,

Liu,

Zhang

et al. 2024

npj Clean Water

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The biodegradable polymer poly-β-hydroxybutyrate (PHB) is a promising carbon source for biological mitigation of nitrogen pollution, a significant problem in aquaculture that physical and chemical methods have not provided a comprehensive solution. Here we investigated the impact of PHB on the zero-water-change largemouth bass culture by 30- and 40-day experiments. PHB loaded into the filter circulation pump at 4 g L−1, optimum value determined by the first experiment, significantly reduced the levels of nitrate by 99.65%, nitrite by 95.96%, and total nitrogen by 85.22% compared to the control without PHB. PHB also significantly increased denitrifying bacteria (e.g., Proteobacteria and Fusobacteria) and expression of denitrification genes (e.g., nirK and nirS) in the microbial community, improving growth and health parameters of largemouth bass. While the impact may vary in other culture systems, PHB thus demonstrated its remarkable utility in aquaculture, highlighting ecological assessment and application to larger aquaculture operations as future considerations.

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Distinct responses of aerobic granular sludge sequencing batch reactors to nitrogen and phosphorus deficient conditions

Cited by 24 publications

References 45 publications

N₂‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

N₂‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

Full-scale aerobic granular sludge for municipal wastewater treatment – granule formation, microbial succession, and process performance

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

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Distinct responses of aerobic granular sludge sequencing batch reactors to nitrogen and phosphorus deficient conditions

Cited by 24 publications

References 45 publications

N2‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

N2‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

Full-scale aerobic granular sludge for municipal wastewater treatment – granule formation, microbial succession, and process performance

Microorganism-mediated denitrogenation of aquaculture systems provoked by poly-β-hydroxybutyrate (PHB)

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N₂‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions

N₂‐fixation can sustain wastewater treatment performance of photogranules under nitrogen‐limiting conditions