Responses of various carbon to nitrogen ratios to microbial communities, kinetics, and nitrogen metabolic pathways in aerobic granular sludge reactor

Zou, Xin; Gao, Mengjiao; Mohammed, Abdul; Liu, Yang

doi:10.1016/j.biortech.2022.128225

Cited by 16 publications

(3 citation statements)

References 47 publications

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“…This is due to the high ammonia nitrogen concentration increasing the content of FA in the system, resulting in the inhibition of AOB and NOB microbial activity. This is consistent with the results of 3.2 and similar to the research results of the ZOU team [16]. The denitrifying bacteria (DNB) in the reactor were mainly the genus of the dominant phylum Proteobacteria, such as norank_f__Saprospiraceae (in the stage from C/N of 20 to C/N of 10).…”

Section: Microbial Community Changesupporting

confidence: 91%

“…Increasing the ammonia nitrogen concentration in the AGS-SBR system can promote the growth of the autotrophic ammonia-oxidizing bacteria community. When the C/N ratio was 3, free ammonia (FA) concentration in the system inhibited the growth of heterotrophic ammonia-oxidizing bacteria and achieved stability of the AGS [16]. Previous studies have suggested that the nutrient ratio parameters of microorganisms in AGS treating high-concentration wastewater do not follow the traditional nutrient ratio (100:5:1) [17].…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance of the AGS-SBR Reactor Based on the Effects of the C/N Ratio and Microbial Community Change

Su¹,

Lei

et al. 2023

Sustainability

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In recent years, the development of AGS technology will likely lead to a new direction in wastewater treatment development in the future. Traditional sewage treatment technology has been unable to meet the increasingly strict quality standards of wastewater treatment and limited land requirements. AGS technology may be a new method to replace traditional sewage treatment technology. However, the stable operation of AGS technology is a major obstacle to the popularization and development of this technology. The C/N ratio is an important parameter affecting the stability and simultaneous nitrogen and phosphorus removal of AGS technology. In order to enhance the nitrogen and phosphorus removal capacity of a low-load aerobic granular sludge SBR (AGS-SBR) system, changes in the morphology, EPS, and simultaneous removal of organic matter, nitrogen, and phosphorus in the AGS system were studied by regulating different C/N ratios (20, 15, 10, 5). The changes in the microbial community in the system were deeply analyzed by high-throughput sequencing technology. The results showed that different C/N ratios have a significant effect on the nitrogen removal rate of AGS but have little effect on the removal rate of organic matter and phosphorus. When the C/N ratio was reduced to 10, it was conducive to the stability of the low-load AGS-SBR system. An effective C/N ratio promoted the secretion of EPS by microorganisms, and the increase in the PN value contributed to the stability of the granular sludge, which became smooth and compact. The main functional genus in the system were norank_f__Saprospiraceae, Tetrasphaera, Ellin6067, and Pseudomonas. In addition, the simultaneous nitrogen removal performance of the system was significantly improved.

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Section: Microbial Community Changesupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance of the AGS-SBR Reactor Based on the Effects of the C/N Ratio and Microbial Community Change

Su¹,

Lei

et al. 2023

Sustainability

View full text Add to dashboard Cite

show abstract

“…A similar C/N ratio (20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) was also observed by Paranjpe et al [38] and Franceschi et al [39]. On the contrary, a low C/N ratio has been shown to release excess ammonia, which inhibits the formation of VFAs [40], while a high C/N ratio prolongs microbial activities leading to ineffective substrate utilization [38]. It is noteworthy to highlight that the C/N ratio of the chosen substrate is determined by its chemical composition.…”

Section: Biobased Polymerssupporting

confidence: 69%

Creating Value from Acidogenic Biohydrogen Fermentation Effluents: An Innovative Approach for a Circular Bioeconomy That Is Acquired via a Microbial Biorefinery-Based Framework

2023

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As a response to the environmental and societal issues that emanate from the high reliance on fossil fuels, the world is now transitioning toward a circular bioeconomy. Acidogenic biohydrogen production is envisaged as a clean fuel of the future due to its non-polluting features and affordability. The major encumbrance for the industrialization of this process is due to the accumulation of metabolic inhibitors (volatile fatty acids (VFAs)), which lower the H2 yields. This review discusses novel methods that can be adopted to valorize the acidogenic VFAs via a “cascade microbial biorefinery-based” approach that enables this process to be economically feasible as it leads to the concomitant production of diverse high-value-added products. The work also elucidates the key setpoint parameters governing the recovery of VFAs during the acidogenic H2 process. It further explores the recent advances in the use of VFAs in microbial biorefineries. Finally, the paper provides some recommendations that might help develop acidogenic microbial biorefineries in the future. Studies focusing on microbial biorefineries tailored towards the valorization/beneficiation of acidogenic VFAs are very scarce in the literature. This work aims to provide new insights into microbial biorefinery-based processes involving the use of acidogenic VFAs as substrates.

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Nature’s architects: a comprehensive review of extracellular polymeric substances and their diverse applications

Atmakuri,

Yadav,

Tiwari

et al. 2024

Waste Dispos. Sustain. Energy

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Responses of various carbon to nitrogen ratios to microbial communities, kinetics, and nitrogen metabolic pathways in aerobic granular sludge reactor

Cited by 16 publications

References 47 publications

Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance of the AGS-SBR Reactor Based on the Effects of the C/N Ratio and Microbial Community Change

Enhanced Simultaneous Nitrogen and Phosphorus Removal Performance of the AGS-SBR Reactor Based on the Effects of the C/N Ratio and Microbial Community Change

Creating Value from Acidogenic Biohydrogen Fermentation Effluents: An Innovative Approach for a Circular Bioeconomy That Is Acquired via a Microbial Biorefinery-Based Framework

Nature’s architects: a comprehensive review of extracellular polymeric substances and their diverse applications

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