Long-term effect of graphene oxide on the aerobic granular sludge wastewater treatment process

Kedves, Alfonz; Rónavári, Andrea

doi:10.1016/j.jece.2020.104853

Cited by 17 publications

(7 citation statements)

References 40 publications

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“…Moreover, as the ammonia nitrogen loading was not increased during the entire process of experiment, the removal efficiency of ammonia nitrogen was 100%, the effluent concentrations of nitrite and nitrate had little change (Figure ). Kedves et al, (2021) also observed the similar phenomenon that the effluent concentrations of nitrite and nitrate performed a stable tendency.…”

Section: Resultsmentioning

confidence: 59%

Performance and responses of aerobic granular sludge at different concentrations of graphene oxide after a single administered dose

Yuan

Wang

et al. 2021

Water Environment Research

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To investigate the impact of graphene oxide (GO) under different concentrations (0, 50, 100, 150, and 200 mg/L) on aerobic granular sludge (AGS) after a single administered dose, the performance of nitrogen removal, microbial enzymatic activity, extracellular polymeric substances (EPSs), and microbial community structure was analyzed in batch tests. The results showed that the impact of GO concentrations on AGS was dose‐ and time‐dependent. Short‐term GO exposure could accelerate the nitrification process of AGS, while relatively concentrations (≥100 mg/L) inhibited the process when present for extended periods of time. The microbial enzymatic activity showed similar tendency. The production of lactate dehydrogenase release (LDH) in 200 mg/L group was increased 48.04% and EPS contents decreased 30.06% compared to the control group at 30th day and showed that high concentrations of GO have toxic effects on AGS. The microbial bacteria responded differently to the stimulation of different concentrations of GO. Practitioner points GO affected AGS system performance in concentration‐ and time‐dependent manners. The nitrification rate of AGS increased in the short term and reversed over time. Long‐term exposure to high GO concentrations caused toxicity to AGS. Different microorganisms had diverse responses to GO concentrations.

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Section: Resultsmentioning

confidence: 59%

Performance and responses of aerobic granular sludge at different concentrations of graphene oxide after a single administered dose

Yuan

Wang

et al. 2021

Water Environment Research

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“…33 In the same way, in aerobic granular sludges, after 7 days of exposure to GO ranging from 35 to 95 mg L −1 , the COD (Chemical Oxygen Demand) removal was highly decreased in a dose dependent manner (up to 73.7% decrease). 46 A decrease of the COD removal was also found in aerobic granular sludge exposed to 115 mg L −1 of GO 47 and in sequential batch reactors exposed to 3,64 and 5.26 g L −1 of GO for 8 days. 36 On the contrary the COD removal increased in the presence of 10 mg L −1 of GO in anaerobic digesters.…”

Section: View Article Onlinementioning

confidence: 69%

“…33 This was also observed with a longer time of exposure to GO (48 h) in river and lake communities during fall, while surprisingly in the same study, no effect was observed during summer, underlining the difference of effect of GO influenced by the different environmental factors, 66 and so different communities. Inhibition of NH 4 + removal by the presence of 115 mg L −1 of GO was also underlined in aerobic granular sludge 47 and by 3.64 and 5.26 g L −1 of GO in sequential batch reactors. 36 Transient effects on the nitrification process were highlighted in aerobic granular sludge exposed to 150 and 200 mg L −1 of GO: after 5 days, the nitrification rate was increased, in parallel with a higher abundances of the Nitrospirae family and the Nitrosomonas genus, while after 30 days it was decreased.…”

Section: Nitrogen Cyclementioning

confidence: 74%

“…[38][39][40] The interaction between GBMs and microbial communities in anaerobic digesters was also investigated in reactors fed with swine manure, 41,42 cattle manure 43 or synthetic wastewater. 44,45 Communities in aerobic granular sludges [46][47][48][49] (strong compact structures embedding microbial cells) were also exposed to GBMs. In addition to the aforementioned bioprocesses that are designed to remove organic matter (and recover energy through methane production in the case of anaerobic digestion), anammox reactors carrying out anaerobic ammonium oxidation were also investigated.…”

Section: Environmental Compartments Studied and Experimental Modelmentioning

confidence: 99%

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Graphene-based nanomaterials and microbial communities: a review of their interactions, from ecotoxicology to bioprocess engineering perspectives

Braylé

Pinelli

Gauthier

et al. 2022

Environ. Sci.: Nano

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“…Finally, the samples were dried (3 h, 30 °C) and coated with gold for microscopic examination. Electron microscopy images were taken with a 10 kV accelerating voltage Hitachi S-4700 Type II FE-SEM microscope, observing secondary electrons with magnitudes of 150×, 250×, 600×, and 2000× [ 68 ].…”

Section: Methodsmentioning

confidence: 99%

Chaetomium and Chaetomium-like Species from European Indoor Environments Include Dichotomopilus finlandicus sp. nov.

et al. 2021

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The genus Chaetomium is a frequently occurring fungal taxon world-wide. Chaetomium and Chaetomium-like species occur in indoor environments, where they can degrade cellulose-based building materials, thereby causing structural damage. Furthermore, several species of this genus may also cause adverse effects on human health. The aims of this research were to identify Chaetomium and Chaetomium-like strains isolated from indoor environments in Hungary and Finland, two geographically distant regions of Europe with drier and wetter continental climates, respectively, and to study their morphological and physiological properties, as well as their extracellular enzyme activities, thereby comparing the Chaetomium and Chaetomium-like species isolated from these two different regions of Europe and their properties. Chaetomium and Chaetomium-like strains were isolated from flats and offices in Hungary, as well as from schools, flats, and offices in Finland. Fragments of the translation elongation factor 1α (tef1α), the second largest subunit of RNA polymerase II (rpb2) and β-tubulin (tub2) genes, as well as the internal transcribed spacer (ITS) region of the ribosomal RNA gene cluster were sequenced, and phylogenetic analysis of the sequences performed. Morphological examinations were performed by stereomicroscopy and scanning electron microscopy. Thirty-one Chaetomium sp. strains (15 from Hungary and 16 from Finland) were examined during the study. The most abundant species was Ch. globosum in both countries. In Hungary, 13 strains were identified as Ch. globosum, 1 as Ch. cochliodes, and 1 as Ch. interruptum. In Finland, 10 strains were Ch. globosum, 2 strains were Ch. cochliodes, 2 were Ch. rectangulare, and 2 isolates (SZMC 26527, SZMC 26529) proved to be representatives of a yet undescribed phylogenetic species from the closely related genus Dichotomopilus, which we formally describe here as the new species Dichotomopilus finlandicus. Growth of the isolates was examined at different temperatures (4, 15, 20, 25, 30, 37, 35, 40, and 45 °C), while their extracellular enzyme production was determined spectrophotometrically.

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Long-term effect of graphene oxide on the aerobic granular sludge wastewater treatment process

Cited by 17 publications

References 40 publications

Performance and responses of aerobic granular sludge at different concentrations of graphene oxide after a single administered dose

Performance and responses of aerobic granular sludge at different concentrations of graphene oxide after a single administered dose

Graphene-based nanomaterials and microbial communities: a review of their interactions, from ecotoxicology to bioprocess engineering perspectives

Chaetomium and Chaetomium-like Species from European Indoor Environments Include Dichotomopilus finlandicus sp. nov.

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