Fate of selected estrogens in two laboratory scale sequencing batch reactors fed with different organic carbon sources under varying solids retention times

Racz, LeeAnn; Muller, James G.; Goel, Ramesh

doi:10.1016/j.biortech.2012.01.059

Cited by 22 publications

(10 citation statements)

References 36 publications

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“…One explanation for the poor ability of the sorption equilibrium isotherm to predict the actual sorbed amounts is that where there is biological activity, propylene glycol degradation in the liquid phase can create a concentration gradient in which sorbed propylene glycol may desorb and become available for degradation. Additionally, these results indicate that sorption characteristics for propylene glycol on a given biomass may change over time throughout a react period (Racz et al, 2012).…”

Section: Resultsmentioning

confidence: 84%

Evaluation of Activated Sludge for Biodegradation of Propylene Glycol as an Aircraft Deicing Fluid

Delorit

Racz

2014

Water Environment Research

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Aircraft deicing fluid used at airport facilities is often collected for treatment or disposal in order to prevent serious ecological threats to nearby surface waters. This study investigated lab scale degradation of propylene glycol, the active ingredient in a common aircraft deicing fluid, by way of a laboratory‐scale sequencing batch reactor containing municipal waste water treatment facility activated sludge performing simultaneous organic carbon oxidation and nitrification. The ability of activated sludge to remove propylene glycol was evaluated by studying the biodegradation and sorption characteristics of propylene glycol in an activated sludge medium. The results indicate sorption may play a role in the fate of propylene glycol in AS, and the heterotrophic bacteria readily degrade this compound. Therefore, a field deployable bioreactor may be appropriate for use in flight line applications.

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Section: Resultsmentioning

confidence: 84%

Evaluation of Activated Sludge for Biodegradation of Propylene Glycol as an Aircraft Deicing Fluid

Delorit

Racz

2014

Water Environment Research

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“…Com o propósito de avaliar o potencial de remoção e/ou degradação de estrogênios utilizando fontes alternativas de carbono orgânico, Racz et al (2012) utilizaram dois reatores em bateladas sequenciais (RBS) em escala laboratorial utilizando esgoto sintético, onde em um foi adicionada peptona e, no outro, glicose como fonte de carbono. Os autores observaram uma maior eficiência de sorção pelo lodo no reator com peptona, o que foi explicado pela alta taxa de nitrificação.…”

Section: Remoção De Estrogênios Por Processos Biológicos De Tratamentunclassified

Ocorrência e remoção de estrogênios por processos de tratamento biológico de esgotos

Cunha¹,

Paula²,

Silva³

et al. 2017

Rev. ambiente água

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Os estrogênios são micropoluentes capazes de causar alterações no sistema endócrino de organismos aquáticos. Uma das principais fontes da sua introdução no meio hídrico é através do lançamento de esgotos domésticos. Este artigo apresenta uma revisão sobre a ocorrência dos estrogênios estrona, estradiol, estriol e etinilestradiol em esgotos brutos e tratados e em águas superficiais, bem como sobre sua remoção por diferentes processos de tratamento biológico de esgoto. Os poucos trabalhos realizados no Brasil mostram que a concentração desses compostos nestas matrizes é expressiva. Além disso, foi observado um decaimento nas concentrações desses estrogênios do esgoto bruto ao tratado. Os sistemas aeróbios, como lodos ativados, mostraram melhor desempenho na remoção de estrogênios, sobretudo por meio da sorção ao lodo. No entanto, pouco se sabe sobre os mecanismos de degradação de tais compostos nestes processos e sobre o comportamento de seus conjugados. Portanto, os processos de tratamento biológico de esgoto representam uma barreira à introdução de estrogênios nos corpos hídricos.

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“…They can affect organisms' reproductive systems, leading to the occurrence of hermaphrodite fish and a decrease in human male fertility [9][10][11][12]. They can affect organisms' reproductive systems, leading to the occurrence of hermaphrodite fish and a decrease in human male fertility [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…The release of environmental estrogens into water bodies harms both aquatic organisms and human beings in several ways. They can affect organisms' reproductive systems, leading to the occurrence of hermaphrodite fish and a decrease in human male fertility [9][10][11][12]. They can mimic natural estrogens and interfere with organisms' endocrine systems.…”

Section: Introductionmentioning

confidence: 99%

Effect of low concentration 17β‐estradiol on the emissions of CH₄ and CO₂ in anaerobic sediments

Ruan

Zhao

Liu

et al. 2013

Enviro Toxic and Chemistry

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The estrogen17β-estradiol (E2) is one of the most widely distributed natural estrogens and is the most potent estrogen in the environment. For the present study, methanogenic bacteria communities were chosen as study objects to analyze the effects of E2 on the production of methane and carbon dioxide. Microecological systems in anaerobic pore water were constructed in the laboratory. The results show that E2 played an enhancing role in methanogenic activity when the concentrations were ≤0.5 ng/L. The enhancement was the strongest at 0.3 ng/L. However, when the E2 concentration exceeded 1.0 ng/L, it inhibited the methanogenic activities of bacteria. The inhibition effect persisted for up to 264 h, beyond which the trend became unclear. On the other hand, E2 has an inhibition effect on CO₂ production in anaerobic sediments, which indicates that E2 had a significant inhibition effect on microbial activities under anaerobic conditions. Based on these experiments, the authors believe that E2 in anaerobic sediments can affect sediment microbial activities and therefore influence the self-purification of water bodies and methane ebullition.

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Fate of selected estrogens in two laboratory scale sequencing batch reactors fed with different organic carbon sources under varying solids retention times

Cited by 22 publications

References 36 publications

Evaluation of Activated Sludge for Biodegradation of Propylene Glycol as an Aircraft Deicing Fluid

Evaluation of Activated Sludge for Biodegradation of Propylene Glycol as an Aircraft Deicing Fluid

Ocorrência e remoção de estrogênios por processos de tratamento biológico de esgotos

Effect of low concentration 17β‐estradiol on the emissions of CH₄ and CO₂ in anaerobic sediments

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Fate of selected estrogens in two laboratory scale sequencing batch reactors fed with different organic carbon sources under varying solids retention times

Cited by 22 publications

References 36 publications

Evaluation of Activated Sludge for Biodegradation of Propylene Glycol as an Aircraft Deicing Fluid

Evaluation of Activated Sludge for Biodegradation of Propylene Glycol as an Aircraft Deicing Fluid

Ocorrência e remoção de estrogênios por processos de tratamento biológico de esgotos

Effect of low concentration 17β‐estradiol on the emissions of CH4 and CO2 in anaerobic sediments

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Effect of low concentration 17β‐estradiol on the emissions of CH₄ and CO₂ in anaerobic sediments