Depletion of chlortetracycline during composting of aged and spiked manures

Bao, Yongbo; Zhou, Qixing; Lian-zhu, Guan; Wang, Yingying

doi:10.1016/j.wasman.2008.08.022

Cited by 100 publications

(53 citation statements)

References 26 publications

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“…Este processo resulta na morte de organismos patogênicos, na diminuição da concentração do fármaco e na geração de um produto com pouco odor, que pode ser armazenado ou espalhado pelo campo. 5,92 Por meio da compostagem foi possível degradar a CTC, em mais de 90% de sua concentração inicial, em amostras de esterco de frangos. 5 Arikan et al 93 verificaram a degradação de 95% da concentração inicial de OTC durante a compostagem de fezes de bezerros.…”

Section: Degradação De Antimicrobianos Veterinários Em Solos E Estercosunclassified

“…5,92 Por meio da compostagem foi possível degradar a CTC, em mais de 90% de sua concentração inicial, em amostras de esterco de frangos. 5 Arikan et al 93 verificaram a degradação de 95% da concentração inicial de OTC durante a compostagem de fezes de bezerros. Apesar deste estudo não avaliar os produtos de degradação, gerados através da decomposição da OTC, foi averiguado que houve um aumento na concentração de bactérias heterotróficas durante a compostagem.…”

Section: Degradação De Antimicrobianos Veterinários Em Solos E Estercosunclassified

“…98 Modelos de primeira ordem, primeira ordem ajustado, bi-exponencial e bifásico foram empregados neste caso. 5,90,96,[99][100][101] Os estudos de determinação da cinética de biodegradação de FV devem ser conduzidos sob condições aeróbicas e anaeróbicas. No primeiro caso, os frascos devem ser inicialmente pesados para que a perda de umidade seja compensada com adição de água.…”

Section: Determinação Da Cinética De Degradação De Fármacos Veterinárunclassified

“…4,5 Somado a este fato, encontra-se o elevado consumo de AV registrado mundialmente. Deste modo, grandes quantidades destas substâncias são lançadas no meio ambiente a cada ano, o que faz com que os impactos causados por sua dispersão alcancem grandes proporções, à medida que as águas superficiais e subterrâneas, o ar, solos, plantas, organismos terrestres e aquáticos são ameaçados e a disseminação de bactérias resistentes ocorre no meio ambiente.…”

Section: Introductionunclassified

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Ocorrência, comportamento e impactos ambientais provocados pela presença de antimicrobianos veterinários em solos

Pereira¹,

Jardim²,

Fostier³

et al. 2012

Quím. Nova

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Section: Degradação De Antimicrobianos Veterinários Em Solos E Estercosunclassified

Section: Determinação Da Cinética De Degradação De Fármacos Veterinárunclassified

Section: Introductionunclassified

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Ocorrência, comportamento e impactos ambientais provocados pela presença de antimicrobianos veterinários em solos

Pereira¹,

Jardim²,

Fostier³

et al. 2012

Quím. Nova

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“…This stage can last for several weeks or months depending on the size of the system and the composition of the ingredients [51,56]. DEHP is resistant to being fully biodegraded during the conventional sludge digestion process [57]; however, the biodegradation of DEHP can be stimulated by thermophilic aerobic sludge digestion (TAD) at the temperatures of approximately [60][61][62][63][64][65][66][67][68][69][70] C [58]. Most microorganisms cannot survive under thermophilic condition and therefore are killed during thermophilic stage.…”

Section: Compostingmentioning

confidence: 99%

Biodegradation of Emerging Organic Contaminants by Composting

Kumar

2012

The Handbook of Environmental Chemistry

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Sewage sludge is a rich source of organic matter and nutrients, which can be utilized for soil improvement and plant growth. The utilization of sewage sludge for plant growth and conversion of sludge into renewable resource is often restricted by the presence of hazardous organic matter (HOM) including di-(2-ethylhexyl) phthalate (DEHP) and antibiotics. HOM enters the sewerage system through various domestic and industrial sources; they are mostly hydrophobic in nature and recalcitrant to microorganisms. HOM has the tendency to accumulate in the sludge during biological wastewater treatment processes and, subsequently, raise the difficulty of further sludge treatment and/or disposal. The application of sewage sludge containing HOM can create risk to ecosystems. The stability and biodegradation of DEHP and antibiotics during composting are discussed in this chapter. Finally, the recent advances in the bioremoval of these HOM are briefly summarized.

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Enzymatic degradation and metabolic product of tylosin residue using enzyme extracted from Burkholderia vietnamiensis strain

Wang

Zhang

et al. 2017

Env Prog and Sustain Energy

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The aims of this study were to extract a tylosin‐degrading enzyme from Burkholderia vietnamiensis and to investigate the enzymatic degradation of tylosin and metabolic product formed. The results showed that the enzyme was extracted and purified to homogeneity with 23.5‐fold purification and a specific activity equal to 247.1 U mg−1 protein. This enzyme with a concentration of 1000 U mL−1 could degrade 100% of 200 mg L−1 tylosin after 180 min of incubation at 35°C. The toxicity of metabolites was lower than that of parent compound. The degradation kinetics followed an empirical model of the natural logarithm of concentration versus the natural logarithm of time, and the calculated half‐lives were about 3.54–3.91 min when the initial concentrations of tylosin ranged from 200 to 600 mg L−1. The enzymatic reaction of tylosin degradation could be well described using Michaelis‐Menten equation, and values of Michaelis constant and maximum velocity were 326.91 µmol L−1 and 16.08 µmol L−1 min−1, respectively. High‐performance liquid chromatography and mass spectrum indicated that tylosin was degraded into two metabolites. The pathway of enzymatic degradation might be that tylosin A was firstly transformed to tylosin B, and then the hydrolysis of lactone bond and the reduction of aldehyde group occurred. These results may provide the basis for biotreatment and removal of tylosin residue in solid and liquid wastes. © 2017 American Institute of Chemical Engineers Environ Prog, 36: 879–886, 2017

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Depletion of chlortetracycline during composting of aged and spiked manures

Cited by 100 publications

References 26 publications

Ocorrência, comportamento e impactos ambientais provocados pela presença de antimicrobianos veterinários em solos

Ocorrência, comportamento e impactos ambientais provocados pela presença de antimicrobianos veterinários em solos

Biodegradation of Emerging Organic Contaminants by Composting

Enzymatic degradation and metabolic product of tylosin residue using enzyme extracted from Burkholderia vietnamiensis strain

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