Metabolic phasing of anoxic-PDBR for high rate treatment of azo dye wastewater

Reddy, C. Nagendranatha; Kumar, Arvind; Mohan, S. Venkata

doi:10.1016/j.jhazmat.2017.08.065

Cited by 31 publications

(7 citation statements)

References 33 publications

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“…Given the similar removal of the LWM neutrals and inert nature of the BB and HS, HOC, which were more readily degraded under aerobic than anoxic conditions, were implicated in playing crucial roles in fine-tuning the bio-RC of bulk organics within SMP. This was likely due to mineralization of aromatic compounds by nonspecific enzyme-driven hydroxylation and ring-fission reactions requiring an aerobic condition …”

Section: Discussionmentioning

confidence: 99%

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Interactive Effects between the Bio-Reactivity Continuum and the Ecological Role of Soluble Microbial Products during Biotransformation

et al. 2022

ACS EST Water

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In this study, well-controlled bioassays were performed to investigate degradation behaviors and bacterial responses during soluble microbial product (SMP) transformation. Reactivity continuum (RC) modeling was first used to mimic the transformation behaviors of the SMP and it revealed that the subpools with higher bio-reactivity (e.g., k ≥ 0.01 h–1) accounted for a higher proportion under aerobic (5.43%) than anoxic (0.24%) conditions. Size exclusion chromatography with continuous organic carbon detection analysis indicated that hydrophobic organic compounds were substantially more degradable under aerobic than anoxic conditions. Sloan’s neutral model results showed that Herbaspirillum and Acinetobacter were consistently selected to be present at higher frequencies than the model prediction under both conditions, suggesting their exceptional metabolic capability of the SMP. Dominant deterministic assembly coupled with higher bacterial diversity and functional redundancy was observed in the microbiota under aerobic conditions, supporting the faster SMP transformation (i.e., higher bio-reactivity). Furthermore, the differential bio-RC led to distinct bacterial interaction patterns of the co-occurring species, shifting from dominant competition (aerobic) to dominant cooperation (anoxic). Nonetheless, the keystone taxa under both conditions were mainly shaped by deterministic selection. This work offers ecological insights into the interactive effects between the bio-RC and bacterial responses during SMP biotransformation.

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Section: Discussionmentioning

confidence: 99%

“…This was likely due to mineralization of aromatic compounds by nonspecific enzyme-driven hydroxylation and ring-fission reactions requiring an aerobic condition. 53 4.2. Selection Effect of SMP on Bacterial Assembly.…”

Section: Bacterialmentioning

confidence: 99%

Interactive Effects between the Bio-Reactivity Continuum and the Ecological Role of Soluble Microbial Products during Biotransformation

et al. 2022

ACS EST Water

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“… 1 Wastewater from these industries has a considerable number of dyes which interrupt reoxygenation ability and increases dissolved oxygen demand in aquatic systems. 2 These organic dyes create severe health issues owing to their carcinogenic, mutagenic, and toxic nature. 3 Dye degradation requires complex processes and reagents as they are highly stable to light and oxidation reactions; and can be easily accumulated in nature due to their inherent stability.…”

Section: Introductionmentioning

confidence: 99%

Porous zinc-discs as nanocatalysts for methylene blue dye treatment in water: sensing, adsorption and photocatalytic degradation

2022

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“…[1][2][3] Among these toxic pollutants, dyes are non-degradable and toxic, and the presence of even a low concentration in water is visible and highly undesirable. 4,5 Meanwhile, dyes are resistant to degradation because of their stable chemical structure. 6 In addition to dye pollution, bacterial infection remains one of the leading causes of death worldwide.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Ag Nanoclusters-Modified Non-Sintered Silica Ceramic-Like Nanosheet for Removing Dyes and Bacteria from Water

Ren

Chen

et al. 2021

IJN

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Purpose Worldwide water contamination treatment and water security are essential for all living organisms. Among various water contaminants, dye, and bacteria pollution needs to be solved urgently. Methods and Results In this work, a ceramic sheet from monodisperse, porous silica nanospheres (SiO 2 NSs) with an average diameter of 220 was prepared. The prepared SiO 2 ceramic sheets were investigated as a “filtration” material in removing dyes (alcian blue, AB; and methylene blue, MB) and bacteria ( E. coli and S. aureus ). The obtained sheets had efficient adsorption efficiency of 98.72% (for AB) and 97.35% (for MB), and a high adsorption capacity for AB is 220 (mg/g), for MB is 176 (mg/g). Furthermore, these SiO 2 ceramic sheets had a high recycling capability for removing dyes by calcination. Being modified by Ag nanoclusters, the ceramic sheets present a strong bactericidal function. Conclusion Our results demonstrated that the obtained SiO 2 non-sintered ceramic sheets is rapid and efficient in the filtration of dyes and bacteria from polluted water.

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Metabolic phasing of anoxic-PDBR for high rate treatment of azo dye wastewater

Cited by 31 publications

References 33 publications

Interactive Effects between the Bio-Reactivity Continuum and the Ecological Role of Soluble Microbial Products during Biotransformation

Interactive Effects between the Bio-Reactivity Continuum and the Ecological Role of Soluble Microbial Products during Biotransformation

Porous zinc-discs as nanocatalysts for methylene blue dye treatment in water: sensing, adsorption and photocatalytic degradation

Preparation of Ag Nanoclusters-Modified Non-Sintered Silica Ceramic-Like Nanosheet for Removing Dyes and Bacteria from Water

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