Complete degradation of high concentrations of tetrachloroethylene by a methanogenic consortium in a fixed-bed reactor

Cabirol, Nathalie; Jacob, François; Perrier, Joseph Louis; Fouillet, Bruno; Chambon, Paul

doi:10.1016/s0168-1656(98)00053-4

Cited by 24 publications

(24 citation statements)

References 15 publications

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“…7,[12][13][14]17,20,30,55) In a fixed-bed column inoculated with a mixture of sediment and granular sludge, PCE has been sequentially dechlorinated to TCE, cDCE, and finally to VC and ethene. 2,6,14,20,22,28,45) Often, however, less chlorinated intermediates (cDCE and VC) are observed as the dominant products in the treated water. TCE and cDCE were the major intermediates in a PCE-degrading anaerobic fixedfilm (fixed-bed) reactor as well as an upflow anaerobic sludge blanket (UASB) reactor, though DCE and VC were also detected.…”

Section: )mentioning

confidence: 99%

“…However, during the past year, the anaerobic reactors have been used to select, enrich and modify the physiological state of one or more of the many possible microbial consortia that can participate in the reductive dechlorination of PCE. 2,6,14,15,20,22,26,28,35,45) Recently, multiple research groups have reported reactors for PCE removal. Most of them used a mixed culture (soils, sediments, and sludge) as PCE degrader in wastewater, and the application of mixed culture has proven effective for the complete degradation of PCE as well as for increasing of the degradation rate of PCE.…”

Section: )mentioning

confidence: 99%

“…6,8,9,18,26,38,[50][51][52] The first-order reaction rate constant of C. bifermentans DPH-1 was equal to Desulfomonile tiedje and Desulfitobacterium sp. strain Y-51 as 0.006 mg protein…”

Section: Batch Culture Kineticsmentioning

confidence: 99%

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Dechlorination of High Concentrations of Tetrachloroethylene Using a Fixed-bed Reactor

Chang¹,

Park²,

Jung³

et al. 2010

Korean Journal of Environmental Health Sciences

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Section: )mentioning

confidence: 99%

Section: )mentioning

confidence: 99%

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Dechlorination of High Concentrations of Tetrachloroethylene Using a Fixed-bed Reactor

Chang¹,

Park²,

Jung³

et al. 2010

Korean Journal of Environmental Health Sciences

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“…Susarla e col. 58 , registraram a degradação de pentacloroanilina, hexaclorobenzeno e pentaclorofenol, por meio de um processo anaeróbio que utilizava um consórcio de bactérias 66 , utilizando um consórcio metanogênico, também obtiveram sucesso no tratamento de tetracloroetileno.…”

Section: Figura 5 Exemplos De Dois Processos Pelos Quais Ocorre a Deunclassified

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Freire¹,

Pelegrini²,

Kubota³

et al. 2000

Quím. Nova

146

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, and mainly the low efficiency of the current remediation processes, are important aspects that have been promoted to study new degrading technologies. Among the great number of new physical and chemical alternatives, the photochemical and electrochemical processes have been played an important role, mainly due to their high degradation capacity through relatively low-cost procedures. In these contexts biological processes, the use of white-rot fungi, or even ligninolytic enzymes produced from them, are also very promising alternatives. However, the necessity of long reaction time and the high cost of the enzyme production process are some of the drawbacks that difficult the definitive consolidation of these processes.Keywords: organochloride compounds; industrial effluents; degradation processes. REVISÃO INTRODUÇÃOCom a evolução dos processos industriais e o conseqüente surgimento de inúmeros produtos que rapidamente tornaram-se de primeira necessidade, a atividade industrial adquiriu um caráter essencial na sociedade contemporânea. Embora a sua importância seja indiscutível, a atividade industrial costuma ser responsabilizada, e muitas vezes com justa razão, pelo fenô-meno de contaminação ambiental, principalmente graças a dois fatores de extrema importância: a) o acúmulo de matérias primas e insumos, que envolve sérios riscos de contaminação por transporte e disposição inadequada; e b) ineficiência dos processos de conversão, o que necessariamente implica a geração de resíduos.Embora exista uma preocupação universal em se evitar episódios de contaminação ambiental, estes eventos prejudiciais continuam acontecendo, principalmente porque, em função dos fatores acima comentados, grande parte dos processos produtivos são intrinsecamente poluentes. Ao longo das décadas, a atividade industrial tem produzido rejeitos gasosos, líquidos e sólidos nocivos ao meio ambiente. Substâncias químicas presentes na atmosfera, principalmente compostos organoclorados voláteis produzidos pelo homem, tem colocado em risco a vida na terra através da destruição da camada de ozônio. Da mesma forma, processos industriais que utilizam grandes volumes de água contribuem significativamente com a contaminação dos corpos d'água, principalmente pela ausência de sistemas de tratamento para os grandes volumes de efluentes líquidos produzidos. Dentro deste contexto, uma importante parcela do processo de contaminação pode ser atribuída às atividades das refinarias de petróleo, indústrias químicas, têxteis e papeleiras. No entanto, não menos importante é a contribuição da atividade agrícola, dos esgotos sanitários e dos resíduos domésticos.Em função deste panorama, muitos estudos têm sido realizados buscando desenvolver tecnologias capazes de minimizar o volume e a toxicidade dos efluentes industriais [1][2][3][4][5] . Infelizmente, a aplicabilidade destes tipos de sistemas está subordinada ao desenvolvimento de processos modificados e ao estabelecimento de sistemas de reciclagem de efluentes, atividades que implicam em tecnologias evolutivas e ...

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“…Under anaerobic conditions, PCE is reductively dechlorinated to TCE, which in turn may be dechlorinated to 1,2-dichloroethylene (cis-l,2-DCE, or trans-l,2-DCE), followed sequentially by vinyl chloride (VC) and finally ethylene (Freedman and Gossett, 1989) or ethane (Debruin et al 1992). Further reductive dechlorination of DCE and VC to CO2 and complete dechlorination of PCE to CO2 are possible under anaerobic conditions (Bradley and Chapelle, 1996;Bradley and Chapelle, 1997;Bradley et al, 1998;Cabirol et al, 1998). However, complete dechlorination of PCE is often not achieved due to slow dechlorination process of its reduced intermediates, cis-l,2-DCE and VC, resulting the accumulation of these unfavorable intermediates in anaerobic environments.…”

Section: >9=mentioning

confidence: 99%

Demonstration of ISCO Treatment of a DNAPL Source Zone at Launch Complex 34 in Cape Canaveral Air Station

Gavaska¹,

Yoon²

2002

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Complete degradation of high concentrations of tetrachloroethylene by a methanogenic consortium in a fixed-bed reactor

Cited by 24 publications

References 15 publications

Dechlorination of High Concentrations of Tetrachloroethylene Using a Fixed-bed Reactor

Dechlorination of High Concentrations of Tetrachloroethylene Using a Fixed-bed Reactor

Novas tendências para o tratamento de resíduos industriais contendo espécies organocloradas

Demonstration of ISCO Treatment of a DNAPL Source Zone at Launch Complex 34 in Cape Canaveral Air Station

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