Interaction between acidogenesis and methanogenesis in the anaerobic treatment of olive oil mill effluents

Beccari, M.; Bonemazzi, F.; Majone, Mauro; Riccardi, Carmela

doi:10.1016/0043-1354(95)00086-z

Cited by 163 publications

(85 citation statements)

References 12 publications

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“…The seed sludge contained 26.2 g VSS, resulting in an initial VSS concentration of 9.5 g/l. After seeding, the OLR was increased stepwise from the initial 4 gCOD/l d to 6,8,12,16, and lastly 24 gCOD/ l d. The reactors were operated at each OLR level for 31 Á/40 days to reach pseudo-steady state before increasing OLR to the next level. The data are based on arithmetic means of six or more measurements at each substrate level.…”

Section: Wastewater and Seed Sludgementioning

confidence: 99%

“…Therefore, it has been proposed that the two phases are physically separated by using two reactors in series: one for VFA production and another for methane production [3]. A two-phase anaerobic process has been successfully applied to the treatment of municipal sludge [3] and various wastewaters, including trout processing wastewater [4], cafeteria wastewater [5], olive oil mill effluent [6], and vegetable-processing wastewater [7]. However, nearly all of these studies have been focused on mesophilic acidogenesis, while information for the thermophilic acidogeneses is very limited [8].…”

Section: Introductionmentioning

confidence: 99%

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Comparative performance of mesophilic and thermophilic acidogenic upflow reactors

Fang

2002

Process Biochemistry

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Two anaerobic acidogenic reactors, one mesophilic (37 8C) and one thermophilic (55 8C), were operated with a synthetic wastewater at a series of organic loading rates (OLRs). There was almost no difference between the two reactors for chemical oxygen demand (COD) reduction, and degree of acidification at any given OLRs. However, the thermophilic reactor had a higher substrate degradation rate, biogas production rate, and specific formation rate of aqueous products than the mesophilic reactor. The predominant acidogenic products in the two reactors were acetate, propionate, butyrate, and ethanol. The distribution of acidogenic aqueous products was significantly influenced by OLR, but not by temperature. Only 1.7 Á/7.9% of the COD in wastewater was converted to hydrogen/methane for the mesophilic reactor, and 2.5 Á/8.8% of the COD for the thermophilic reactor. #

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Section: Wastewater and Seed Sludgementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative performance of mesophilic and thermophilic acidogenic upflow reactors

Fang

2002

Process Biochemistry

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“…O processo de digestão anaeróbia tem sido empregado com sucesso como tratamento biológico de distintas tipologias de efluentes orgâni-cos, com destaque para o setor de tratamento de esgoto doméstico e de efluentes da indústria alimentícia e de bebidas, apresentando vantagens com relação aos processos de tratamento aeróbio, como: baixos custos operacionais, baixa produção de lodo, geração de biofertilizante, redução da emissão de gases do efeito estufa e geração de biogás, passível de utilização energética variada (MCCARTY, 1964;LETTINGA et al, 1980;BECCARI et al, 1996;CHERNICHARO, 2007 (TAYLOR, 1956, apud ZICARI, 2003PHILIP & BROOKS, 1974;NEUMANN & LYNN, 1984;KOHL & NEILSEN, 1997;McKINSEY, 2003;BAGREEV;ADIB;BANDOSZ, 2001;ILIUTA & LARACHI, 2003;HORIKAWA et al, 2004;ZHANG & TONG, 2006;SAELEE et al, 2009;XIAO et al, 2008;OSORIO & TORRES, 2009;DESHMUKH;SHETE;PAWAR, 2012).…”

Section: Introductionunclassified

Avaliação de lavador de gases do tipo Venturi, operando com solução de hidróxido de sódio, para dessulfuração de biogás com altas concentrações de H2S

Colturato

Faria

Motta

et al. 2016

Eng. Sanit. Ambient.

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RESUMOO processo de metanização tem sido empregado com sucesso como tratamento biológico de distintas tipologias de efluentes orgânicos.Para conversão do biogás em energia, o sulfeto de hidrogênio (H 2 S) é o principal composto a ser removido. A metanização da vinhaça, principal efluente do setor sucroenergético, gera um biogás com concentrações de H 2 S que podem ultrapassar os 30. 000 ppmV, com grande variação devido às condições operacionais das usinas. Processos químicos de dessulfuração apresentam-se como uma alternativa que alia robustez e maior controle operacional do processo, além de não resultarem em diluição da concentração de metano, como ocorre em processos biológicos. Entretanto, a principal desvantagem desses processos é a demanda de compostos químicos, resultando em custos operacionais elevados. Esse trabalho teve como objetivo avaliar a viabilidade técnica de se realizar uma dessulfuração química de biogás com altas concentrações de H 2 S, além de determinar as concentrações de hidróxido de sódio (NaOH) em meio aquoso que proporcionassem altas eficiências de remoção de H 2 S e que possibilite que o efluente desse processo seja passível de regeneração por microrganismos sulfo-oxidantes. Foi utilizado um lavador do tipo Venturi, com uma solução de 5, 00 x 10 -2 mol.L -1 de NaOH. ABSTRACTThe methanation process has been successfully used as a biological treatment method for different effluent typologies. For biogas to energy conversion, the hydrogen sulfide (H 2 S) is the most important compound that must be removed. . In the pH range favorable to this microorganisms, the H 2 S removal efficiency varied from 99.3 to 99. 9%. It was observed that it is possible to achieve maximum efficiency of removal of H 2 S using solutions of 5. 00 x 10 -3 mol.L -1 NaOH, obtaining an effluent with proper pH to grow sulfo oxidant microorganisms. Moreover, it was verified that carbon dioxide significantly influenced the competition for the hydroxyls present in the solution.

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“…In the Mediterranean basin alone, approximately 1 056 t of caffeic acid are released annually from countries discharging olive oil mill wastewater (calculated from Beccari et al, 1996;D'Annibale et al, 2000). To achieve sustainable development goals, one of the best ways to treat this wastewater would be by anaerobic digestion due to its well-recognised sustainability.…”

Section: Introductionmentioning

confidence: 99%

Toxicity and biodegradability of caffeic acid in anaerobic digesting sludge

Hernández

Edyvean

2018

WSA

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Caffeic acid in waste comes from a variety of industries, and its disposal is likely to increase due to emerging processes such as graphene production and use in healthcare products. The current sustainable option to treat waste caffeic acid and prevent its natural transformation in soil to greenhouse gases, is anaerobic digestion. However, little is known about the toxic and inhibitory effects of caffeic acid on biogas production as well as its ultimate anaerobic biodegradability; or about the reactiveadsorptive processes taking place with caffeic acid in sludge, metabolic intermediates, thermodynamic limitations and the effects on extracellular polymeric substances (EPS). Standard methods revealed that 80% of biogas production (EC 80 ) from a readily digestible biomass was inhibited at 389 mg caffeic acid·g -1 VSS. Up to 52% of caffeic acid was biodegraded. β-oxidation and reductive dehydroxylation were the initial activation reactions transforming caffeic acid into typical polyphenol structural units (protocatechuic acid and 4HBA). Adsorption of caffeic acid (53.3% and 28.6%) to the sludge occurred even at inhibitory concentrations. The EPS structure remained unchanged regardless of the increase in concentration of caffeic acid. Reasonable concentrations of caffeic acid could be co-digested with a similar readily digestible biomass with an expected reduction in biogas production. It is feasible to treat waste caffeic acid by anaerobic digestion and adsorption of its derivates, in order to reduce the contribution to global warming and to protect the environment.

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Interaction between acidogenesis and methanogenesis in the anaerobic treatment of olive oil mill effluents

Cited by 163 publications

References 12 publications

Comparative performance of mesophilic and thermophilic acidogenic upflow reactors

Comparative performance of mesophilic and thermophilic acidogenic upflow reactors

Avaliação de lavador de gases do tipo Venturi, operando com solução de hidróxido de sódio, para dessulfuração de biogás com altas concentrações de H2S

Toxicity and biodegradability of caffeic acid in anaerobic digesting sludge

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