Effect of NaCl on thermophilic (55°C) methanol degradation in sulfate reducing granular sludge reactors

Vallero, M.V.G.; Pol, L.W. Hulshoff; Lettinga, G.; Lens, Piet N.L.

doi:10.1016/s0043-1354(03)00024-1

Cited by 85 publications

(49 citation statements)

References 21 publications

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“…Os dados apresentados conduzem à suposição de que a inibição da metanogênese pode ter sido causada pela presença de cátions de sódio e pela ação inibitória do sulfeto. Vallero et al (2003) operaram um reator UASB que degradava metanol em condições termofílicas (55°C) na presença de excesso de sulfato (DQO/sulfato=0,5) e elevada salinidade. Os autores verificaram que a adição de 25 gNaCl.L -1 (10 gNa + .L -1 ) inibiu a degradação do metanol e que, mesmo em baixas concentrações de sódio (3,0 gNa + .L -1 ), houve alterações consideráveis na rota metabólica do metanol.…”

Section: Instalação Experimentalunclassified

“…Para concentrações maiores que 1,0 g.Na + .L -1 e menores que 2,0 g.Na + .L -1 , a eficiência caiu para 92%. Para valores a partir O declínio na eficiência de remoção de DQO também foi verificado por Vallero et al (2003) na degradação anaeróbia termofílica de metanol em ambiente salino. Esses autores citam que o aumento da concentração de NaCl provocou uma diminuição constante na produção de sulfeto, acompanhada por uma queda na eficiência de remoção de (0,75) (1,00) (1,25) (1,50) (2,00) (2,50) (3,00) (4,00) (5,00) (7,50) (10,00) Razão DQOr/[SO Figura 3 -Concentrações médias de sulfato removido e razão sulfato r /DQO r .…”

Section: Instalação Experimentalunclassified

“…O efeito do sódio na estrutura do grânulo foi determinante na inibição da metanogênese observada. LETTINGA, 1988;LENS et al, 1998;GREBEN;MAREE;MNQANQENI, 2000;DAMIANOVIC & FORESTI, 2009;COSTABILE et al, 2011) O efeito do sódio sobre a digestão anaeróbia tem sido extensivamente estudado (FEIJOO et al, 1995;GUERRERO et al, 1997;VALLERO et al, 2003), no entanto os resultados disponíveis na literatura sobre as concentrações inibitórias do íon Na + são escassos. Esses autores admitem que o limite máximo de sódio em reatores anaeróbios ainda não está bem definido e depende de fatores tais como: adaptação da biomassa e efeitos como antagonismo/sinergismo, causados pela presença de outros cátions.…”

Section: Introductionunclassified

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Influência da razão DQO/[SO 4 2- ] e da concentração de Na + na remoção de matéria orgânica e sulfato em reator UASB

Callado

Damianovic

Foresti

2016

Eng. Sanit. Ambient.

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Section: Instalação Experimentalunclassified

Section: Introductionunclassified

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Influência da razão DQO/[SO 4 2- ] e da concentração de Na + na remoção de matéria orgânica e sulfato em reator UASB

Callado

Damianovic

Foresti

2016

Eng. Sanit. Ambient.

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“…However, methane fermentation using common anaerobic technologies in saline condition ( 3 %) is often difficult because of inhibitory effect by salinity 1) 7) . Methane fermentation occurs in complex microbial ecosystems, in which organic matter is converted to methane in three steps: hydrolysis/acidogenesis, acetogenesis, and methanogenesis 8) .…”

Section: Introductionmentioning

confidence: 99%

High-rate Fermentation of Acetate to Methane under Saline Condition by Aceticlastic Methanogens Immobilized in Marine Sediment

Kita

Kobayashi

Miura

et al. 2016

J. Jpn. Petrol. Inst.

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, which is impossible without immobilization of the cells in the sediment. Using scanning electron microscopy, we observed Methanosaeta-like filamentous microorganisms and Methanosarcina-like coccoid microorganisms in granule-like structures. The results demonstrated that marine sediment is not only a promising microbial resource of halophilic aceticlastic methanogens, but also a supporting material to fix aceticlastic methanogens in a fixed-bed reactor.

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“…Conventional physicochemical treatment processes for salinity wastewater are energy intensive and costly. Although biological processes have been recommended for salinity wastewater treatment (5, 6), high salinity may cause cell plasmolysis and even the death of microorganisms due to osmotic pressure increases (7,8). To address this issue, wastewaters are always diluted, which results in a meaningless freshwater consumption and increases operational cost (5).…”

mentioning

confidence: 99%

Electrical Stimulation Improves Microbial Salinity Resistance and Organofluorine Removal in Bioelectrochemical Systems

Feng

Zhang

Guo

et al. 2015

Appl Environ Microbiol

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cFed batch bioelectrochemical systems (BESs) based on electrical stimulation were used to treat p-fluoronitrobenzene (p-FNB) wastewater at high salinities. At a NaCl concentration of 40 g/liter, p-FNB was removed 100% in 96 h in the BES, whereas in the biotic control (BC) (absence of current), p-FNB removal was only 10%. By increasing NaCl concentrations from 0 g/liter to 40 g/liter, defluorination efficiency decreased around 40% in the BES, and in the BC it was completely ceased. p-FNB was mineralized by 30% in the BES and hardly in the BC. Microorganisms were able to store 3.8 and 0.7 times more K ؉ and Na ؉ intracellularly in the BES than in the BC. Following the same trend, the ratio of protein to soluble polysaccharide increased from 3.1 to 7.8 as the NaCl increased from 0 to 40 g/liter. Both trends raise speculation that an electrical stimulation drives microbial preference toward K ؉ and protein accumulation to tolerate salinity. These findings are in accordance with an enrichment of halophilic organisms in the BES. Halobacterium dominated in the BES by 56.8% at a NaCl concentration of 40 g/liter, while its abundance was found as low as 17.5% in the BC. These findings propose a new method of electrical stimulation to improve microbial salinity resistance.O rganofluorine compounds, especially fluorinated aromatic compounds, are widely used in the production of adhesives, pesticides, dyes, pharmaceuticals, refrigerants, and surfactants (1). They were found to inhibit enzymes, modify cell-to-cell communication, and disrupt membrane transport as well as energy generation processes (2). Due to their high toxicity and recalcitrance, conventional biological methods fail to efficiently remove organofluorine from wastewaters (1, 3). On the other hand, bioelectrochemical treatment has been proved to be an effective method to minimize refractory properties of typical p-fluoronitrobenzene-contaminated organofluorine wastewater (4).Salinity poses another serious challenge to the treatment of such organofluorine-containing wastewater. Typically, addition of strong acid or alkali to adjust the pH during production processes results in high salt concentrations in organofluorine wastewaters. As an example, salinity concentrations from an organofluorine industry effluent in China typically fluctuate between 2 and 3%, with a maximum of 5%. Conventional physicochemical treatment processes for salinity wastewater are energy intensive and costly. Although biological processes have been recommended for salinity wastewater treatment (5, 6), high salinity may cause cell plasmolysis and even the death of microorganisms due to osmotic pressure increases (7,8). To address this issue, wastewaters are always diluted, which results in a meaningless freshwater consumption and increases operational cost (5). An enhancement of microbial salinity resistance would enable implementation of biological methods for salinity wastewater treatment, which could be succeeded by acclimatization and enrichment of haloduric or halophilic strains (5). H...

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Effect of NaCl on thermophilic (55°C) methanol degradation in sulfate reducing granular sludge reactors

Cited by 85 publications

References 21 publications

Influência da razão DQO/[SO 4 2- ] e da concentração de Na + na remoção de matéria orgânica e sulfato em reator UASB

Influência da razão DQO/[SO 4 2- ] e da concentração de Na + na remoção de matéria orgânica e sulfato em reator UASB

High-rate Fermentation of Acetate to Methane under Saline Condition by Aceticlastic Methanogens Immobilized in Marine Sediment

Electrical Stimulation Improves Microbial Salinity Resistance and Organofluorine Removal in Bioelectrochemical Systems

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