Removal of Estrogens by Activated Sludge Under Different Conditions Using Batch Experiments

Bernardelli, Jossy Karla Brasil; Liz, Marcus Vinícius de; Belli, Tiago José; Lobo-Recio, María Ángeles; Lapolli, Flávio Rubens

doi:10.1590/0104-6632.20150322s00003667

Cited by 13 publications

(17 citation statements)

References 43 publications

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“…In addition, certain secondary treatment solutions have wide quiescent surfaces, including sequencing batch reactors during the settle and decant phases as well as biological aerated ilters awaiting backwash. All of these can be considerable sources of odor emissions in the atmosphere [33]. Regarding table 3, it can be shown that the phases of equalization and Primary Clari ier produce the most gaseous contaminants in all the treatment levels.…”

Section: Resultsmentioning

confidence: 99%

“…Two main assumptions were used in constructing formulations for these transfer processes: Henry's law and the two-ilm resistance theory apply. The process of transferring a compound from an area source, such as a primary tank surface and the surface of diffused aerated activated sludge reactor, to the atmosphere is known as volatilization [25,33]. Because the overall mass transfer coef icient plays such a signi icant role in determining volatilization rates, it must be accurately analyzed.…”

Section: Resultsmentioning

confidence: 99%

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Simulating the dispersion of poisonous organic chemical compounds in wastewater treatment process through the active sludge method using the TOXChem model

Masoomi¹,

Azizi²,

Aghlmand³

et al. 2021

Ann Biomed Sci Eng

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Naturally, microorganisms decompose the organic material existing in nature, both in the presence or absence of oxygen. The majority of materials such as poisonous chemical compounds, heavy metals, would prevent the treatment process from taking place, lead to the entry of these contaminants into the environment results in the emergence of numerous diseases. In the present study, using the TOXChem4.1 simulation model, attempts were made to simulate a wastewater treatment plant and then assess the dispersions of contaminants including 1,2-Dimethylnaphthalene, 1,3-Dinitropyrene, 1,6-Dimethylnaphthalene, 1,6-Dinitropyrene, and 17a-ethinylestradiol (EE2) in concentrations of a common scenario. The results of computer simulations showed that the EE2 contaminant is of the highest percentage of decomposition among others, due to its wider chemical structure. Consequently, it is clear that such contaminant is of the highest mass in the sludge exiting the treatment plant. In addition, the results of the simulations demonstrated that the highest volumes of gaseous pollutants take place in the modulation and initial sedimentation units.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Simulating the dispersion of poisonous organic chemical compounds in wastewater treatment process through the active sludge method using the TOXChem model

Masoomi¹,

Azizi²,

Aghlmand³

et al. 2021

Ann Biomed Sci Eng

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show abstract

“…The chemicals were added to test vessels in a solution of methanol or acetone-volume of solvent added was limited to 0.1% to minimize any potential effect. These solvents will not inhibit microbial action as methanol is non-toxic to microorganisms below 1,000 mg/L (Novak et al, 1985;Brasil Bernardelli et al, 2015) and acetone is non-toxic below 5% v/v in different redox conditions (González, 2006). For the aerobic experiment, 1,000 μg/L for triclosan, 200 μg/L for PAHs, 100 μg/L for estrogens and 30 μg/L for PBDEs were spiked into the test vessels.…”

Section: Experimental Design Of Biodegradation Assaymentioning

confidence: 99%

Fate of four Different Classes of Chemicals Under Aerobic and Anaerobic Conditions in Biological Wastewater Treatment

Komolafe¹,

Mrozik

Dolfing

et al. 2021

Front. Environ. Sci.

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The removal mechanisms and extent of degradation of 28 chemicals (triclosan, fifteen polycyclic aromatic hydrocarbons, four estrogens, and eight polybrominated diphenyl ether congeners) in different biological treatment systems [activated sludge, up-flow anaerobic sludge blanket reactor (UASB) and waste stabilization pond (WSP)] was investigated to provide insights into the limits of engineered biological treatment systems. This was done through degradation experiments with inhibition and abiotic controls in static reactors under aerobic and anaaerobic conditions. Estrogens showed higher first order degradation rates (0.1129 h−1) under aerobic conditions with activated sludge inocula followed by low molecular weight (LMW) PAHs (0.0171 h−1), triclosan (0.0072 h−1), middle (MMW) (0.0054 h−1) and high molecular weight PAHs (HMW) (0.0033 h−1). The same trend was observed under aerobic conditions with a facultative inoculum from a WSP, although at a much slower rate. Biodegradation was the major removal mechanism for these chemicals in the activated sludge and WSP WWTPs surveyed. Photodegradation of these chemicals was also observed and varied across the group of chemicals (estrogens (light rate = 0.4296 d−1; dark = 0.3900 d−1) degraded faster under light conditions while reverse was the case for triclosan (light rate = 0.0566 d−1; dark = 0.1752 d−1). Additionally, all the chemicals were resistant to anaaerobic degradation with UASB sludge, which implies that their removal in the UASB of the surveyed WWTP was most likely via sorption onto solids. Importantly, the first order degradation rate determined in this study was used to estimate predicted effluent concentrations (PECs). The PECs showed good agreement with the measured effluent concentrations from a previous study for these treatment systems.

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“…Moreover, it was shown that the degradation rate depended on the carbon to nitrogen ratio - the lower it was, the faster the estrogen decomposition was. In addition, 17β-estradiol is usually degraded faster while estrone and synthetic estrogens are decomposed slower [ 34 , 47 ]. Moreover, Wang et al [ 37 ] noted the synergistic effect of mixture strains during 17β-estradiol degradation.…”

Section: Microbiological Degradation Of Edcsmentioning

confidence: 99%

Suitability of Immobilized Systems for Microbiological Degradation of Endocrine Disrupting Compounds

Wojcieszyńska

Marchlewicz

2020

Molecules

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The rising pollution of the environment with endocrine disrupting compounds has increased interest in searching for new, effective bioremediation methods. Particular attention is paid to the search for microorganisms with high degradation potential and the possibility of their use in the degradation of endocrine disrupting compounds. Increasingly, immobilized microorganisms or enzymes are used in biodegradation systems. This review presents the main sources of endocrine disrupting compounds and identifies the risks associated with their presence in the environment. The main pathways of degradation of these compounds by microorganisms are also presented. The last part is devoted to an overview of the immobilization methods used for the purposes of enabling the use of biocatalysts in environmental bioremediation.

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Removal of Estrogens by Activated Sludge Under Different Conditions Using Batch Experiments

Cited by 13 publications

References 43 publications

Simulating the dispersion of poisonous organic chemical compounds in wastewater treatment process through the active sludge method using the TOXChem model

Simulating the dispersion of poisonous organic chemical compounds in wastewater treatment process through the active sludge method using the TOXChem model

Fate of four Different Classes of Chemicals Under Aerobic and Anaerobic Conditions in Biological Wastewater Treatment

Suitability of Immobilized Systems for Microbiological Degradation of Endocrine Disrupting Compounds

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