Insights into the relationship between denitrification and organic carbon release of solid-phase denitrification systems: Mechanism and microbial characteristics

Luo, Fangzhou; Zhang, Jinsen; Qi, Wei; Zhao, Jianfu; Jiang, Danyang; Liu, Shuai; Xia, Zhiheng; Zhang, Jingbing; Qi, Lu; Wang, Hongchen; Li, Guohua

doi:10.1016/j.biortech.2022.128044

Cited by 12 publications

(2 citation statements)

References 31 publications

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“…In addition to the application of PHA, the application of PCL has also been of interest. Under different influent nitrate loads, a PCL-supported denitrification system achieved an average nitrate removal rate exceeding 90% with a maximum denitrification rate of 0.67 g N/(L·d) . The PBS, PCL, and PHBV mixture also promoted microbial denitrification, with denitrification rates ranging within 0.20–1.00 g N/(L·d). , When 40% (w/w) PHBV and 40% (w/w) PLA were used as external carbon sources for treating WWTP effluents, the average denitrification rate during intermittent testing was 5.51 mg N/h .…”

Section: Fate Of Biodegradable Microplastics In Wastewater and Sludge...mentioning

confidence: 98%

Biodegradable Microplastics in Municipal Wastewater and Sludge Treatment Processes: A Review on Occurrence, Fate, and Effects

Lu,

Dong,

Zhou

et al. 2023

ACS EST Water

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Biodegradable plastics have emerged as reliable alternatives to conventional plastics for alleviating global plastic pollution. However, biodegradable plastics could also rupture into microplastics and inevitably accumulate in wastewater treatment plants (WWTPs). The fate and effects of biodegradable microplastics (BMPs) in wastewater treatment and sludge disposal processes are of great concern but have not yet been reviewed. This review comprehensively expounded the occurrence, fate, and consequential effects of BMPs in WWTPs. Specifically, the environmental contents of BMPs and the corresponding detection techniques were analyzed and compared with conventional microplastics. Furthermore, the mechanical aging, additive release, extracellular hydrolysis, and microbial biotransformation of BMPs were documented meticulously. Also, the effects of BMPs on microbial community structure and function, as well as pollutant adsorption, were underscored. The obtained knowledge would update our understanding of the risk and control of BMPs in WWTPs. Recommendations for future investigations are made.

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Section: Fate Of Biodegradable Microplastics In Wastewater and Sludge...mentioning

confidence: 98%

Biodegradable Microplastics in Municipal Wastewater and Sludge Treatment Processes: A Review on Occurrence, Fate, and Effects

Lu,

Dong,

Zhou

et al. 2023

ACS EST Water

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“…With the rapid development of human society, agriculture, and industry, excessive use and consumption of nitrogen compounds has resulted in nitrogen pollution, which directly causes water eutrophication and climate change . Biodenitrification is the mainstream approach to removing nitrogen pollution in wastewater treatment plants (WWTPs).…”

Section: Introductionmentioning

confidence: 99%

How β-Cyclodextrin-Functionalized Biochar Enhanced Biodenitrification in Low C/N Conditions via Regulating Substrate Metabolism and Electron Utilization

Shi

Feng

Xiao

et al. 2023

Environ. Sci. Technol.

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Biodenitrification plays a vital role in the remediation of nitrogen-contaminated water. However, influent with a low C/N ratio limits the efficiency of denitrification and causes the accumulation/emission of noxious intermediates. In this study, β-cyclodextrin-functionalized biochar (BC@β-CD) was synthesized and applied to promote the denitrification performance of Paracoccus denitrificans when the C/N was only 4, accompanied by increased nitrate reduction efficiency and lower nitrite accumulation and nitrous oxide emission. Transcriptomic and enzymatic activity analyses showed BC@β-CD enhanced glucose degradation by promoting the activities of glycolysis (EMP), the pentose phosphate pathway (PPP), and the tricarboxylic acid (TCA) cycle. Notably, BC@β-CD drove a great generation of electron donors by stimulating the TCA cycle, causing a greater supply of substrate metabolism to denitrification. Meanwhile, the promotional effect of BC@β-CD on oxidative phosphorylation accelerates electron transfer and ATP synthesis. Moreover, the presence of BC@β-CD increased the intracellular iron level, causing further improved electron utilization in denitrification. BC@β-CD helped to remove metabolites and induced positive feedback on the metabolism of P. denitrificans. Collectively, these effects elevated the glucose utilization for supporting denitrification from 36.37% to 51.19%. This study reveals the great potential of BC@β-CD for enhancing denitrification under low C/N conditions and illustrates a potential application approach for β-CD in wastewater bioremediation.

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Effect of Dissolved Oxygen on Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) Solid-Phase Denitrification: Simultaneous Nitrification and Denitrification Performance and Microbial Community

Zhou,

Liu,

et al. 2024

Water Air Soil Pollut

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Insights into the relationship between denitrification and organic carbon release of solid-phase denitrification systems: Mechanism and microbial characteristics

Cited by 12 publications

References 31 publications

Biodegradable Microplastics in Municipal Wastewater and Sludge Treatment Processes: A Review on Occurrence, Fate, and Effects

Biodegradable Microplastics in Municipal Wastewater and Sludge Treatment Processes: A Review on Occurrence, Fate, and Effects

How β-Cyclodextrin-Functionalized Biochar Enhanced Biodenitrification in Low C/N Conditions via Regulating Substrate Metabolism and Electron Utilization

Effect of Dissolved Oxygen on Poly(3-Hydroxybutyrate-co-3-Hydroxyvalerate) Solid-Phase Denitrification: Simultaneous Nitrification and Denitrification Performance and Microbial Community

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