Effect of the gradual increase of Na2SO4 on performance and microbial diversity of aerobic granular sludge

Shi, Xianbin; Li, Ji; Wang, Xiaochun; Zhang, Xiaolei; Tang, Liaofan

doi:10.1016/j.jenvman.2021.112696

Cited by 16 publications

(2 citation statements)

References 60 publications

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“…Elevated NaCl has been shown to dramatically alter assembly trajectories in affected bacterial communities and depress carbon‐specific metabolic processes (Li et al, 2021; Pang et al, 2020; Van Gray et al, 2020; Zhang et al, 2021). Elevated Na 2 SO 4 concentrations have been linked to decreased microbial diversity in wastewater treatment (Shi et al, 2021), reduced rates of cellular reproduction in both batch cultures (Shiers et al, 2005) and microcosms (Nguyen & Kumar, 2022), and have resulted in elevated N mineralization rates in Na 2 SO 4 treated soils (Gennari et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Examining the impacts of salt specificity on freshwater microbial community and functional potential following salinization

Van Gray,

Ayayee

2024

Environmental Microbiology

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The degradation of freshwater systems by salt pollution is a threat to global freshwater resources. Salinization is commonly identified by increased specific conductance (conductivity), a proxy for salt concentrations. However, conductivity fails to account for the diversity of salts entering freshwaters and the potential implications this has on microbial communities and functions. We tested 4 types of salt pollution—MgCl2, MgSO4, NaCl, and Na2SO4—on bacterial taxonomic and functional α‐, β‐diversity of communities originating from streams in two distinct localities (Nebraska [NE] and Ohio [OH], USA). Community responses depended on the site of origin, with NE and OH exhibiting more pronounced decreases in community diversity in response to Na2SO4 and MgCl2 than other salt amendments. A closer examination of taxonomic and functional diversity metrics suggests that core features of communities are more resistant to induced salt stress and that marginal features at both a population and functional level are more likely to exhibit significant structural shifts based on salt specificity. The lack of uniformity in community response highlights the need to consider the compositional complexities of salinization to accurately identify the ecological consequences of instances of salt pollution.

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Section: Discussionmentioning

confidence: 99%

Examining the impacts of salt specificity on freshwater microbial community and functional potential following salinization

Van Gray,

Ayayee

2024

Environmental Microbiology

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“…Additionally, Proteobacteria are known to secrete a substantial number of EPSs [39], which are crucial for granule formation. Chloroflexi and Bacteroidota are also common in AGS reactors [40], and they play a structural role in granule formation [41]. Their relative abundances showed some variation between the seed sludge and granular sludge samples.…”

Section: Microbial Structure Analysismentioning

confidence: 99%

Enhanced Simultaneous Nitrogen and Phosphorus Removal in a Continuous-Flow Granular Sludge System under Gradient-Controlled Hydraulic Loading

Zhao,

An,

Wan

et al. 2024

Water

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The feasibility of the aerobic granulation of activated sludge was investigated in a continuous-flow anaerobic–anoxic–oxic system under gradient-controlled hydraulic loading on the surface of a cyclone separator. Concentrated domestic sewage was used. After 80 days of operation, 80% of activated sludge in the system was in the form of granular sludge with an average particle size of 373 μm. High removal efficiency was achieved for chemical oxygen demand (94.40%), NH4+-N (99.93%), total nitrogen (89.44%), and total phosphorus (96.92%). A batch study revealed that Pseudomonas (1.34%) and Dechloromonas (1.05%) as the main denitrifying phosphorus-accumulating organisms could efficiently remove phosphorus using nitrate as an electron acceptor, which improved the utilization efficiency of carbon sources and achieved simultaneous denitrification and phosphorus removal. Overall, the study demonstrates the feasibility of enhanced denitrification and phosphorus removal in a continuous-flow granular sludge system. The sludge system enables simultaneous nitrogen and phosphorus removal under low carbon-to-nitrogen ratios.

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Solid-phase denitrification in high salinity and low-temperature wastewater treatment

Han

Zhang

et al. 2021

Bioresource Technology

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Effect of the gradual increase of Na2SO4 on performance and microbial diversity of aerobic granular sludge

Cited by 16 publications

References 60 publications

Examining the impacts of salt specificity on freshwater microbial community and functional potential following salinization

Examining the impacts of salt specificity on freshwater microbial community and functional potential following salinization

Enhanced Simultaneous Nitrogen and Phosphorus Removal in a Continuous-Flow Granular Sludge System under Gradient-Controlled Hydraulic Loading

Solid-phase denitrification in high salinity and low-temperature wastewater treatment

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