Sedimentation of mixed cultures using natural coagulants for the treatment of effluents generated in terrestrial fuel distribution terminals

Vieira, Rafael Bruno; Vieira, Patrícia Angélica; Cardoso, Saulo Luiz; Ribeiro, Eloízio Júlio; Cardoso, Vicelma Luiz

doi:10.1016/j.jhazmat.2012.06.043

Cited by 15 publications

(13 citation statements)

References 23 publications

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“…Preliminary tests showed that chitosan is not efficient for hydrocarbon adsorption. Vieira et al (2012), where a batch reaction tank with intermittent aeration showed better results. It was noted in this study that, in the continuous process without aeration, the dissolved oxygen concentration was 0.3 mgO 2 /L.…”

Section: Tph Removal In the Reaction Tankmentioning

confidence: 99%

“…This suggests that low HRT enhances the biodegradation of the effluent by C 1 mixed culture. Vieira et al (2010Vieira et al ( , 2012 studied the biodegradability of the same effluent presented in this work in a sequential batch reactor (SBR) tank of 5 L using chitosan, Moringa oleifera and ferric chloride with polyacrylamide as coagulant. In these experiments, the TOC and TPH removals for 4 cycles of operation were: Moringa oleifera (31±1.5% and 28±1.4%), chitosan (82% ± 0.5 and 80 ± 1.0%) and for the combination of ferric chloride and polyacrylamide (78.4± 1.0% and 77.1±1.2%), respectively.…”

Section: Tph Removal In the Reaction Tankmentioning

confidence: 99%

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Biodegradation of Effluent Contaminated With Diesel Oil and Gasoline Using Chitosan as a Natural Coagulant in a Continuous Process

Oliveira

Cardoso

Vieira

et al. 2016

Braz. J. Chem. Eng.

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-This study evaluated the effects of aeration (constant aeration, intermittent aeration and a lack of aeration) and hydraulic retention time (HRT) (2, 3 and 4 days) on a continuous process with cell recycling, using chitosan as a natural coagulant for the sedimentation of a C 1 mixed culture. This culture was used for the biodegradation of hydrocarbons present in the effluent contaminated with diesel oil and gasoline. The responses monitored included the turbidity removal (TR), total petroleum hydrocarbon (TPH) removal and volatile suspended solids (VSS). Constant aeration and an HRT of 4 days produced the best results for the continuous process, resulting in the highest TPH removals (94% and 75% reductions in the supernatant and reaction tank, respectively) and TR (95%).

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Section: Tph Removal In the Reaction Tankmentioning

confidence: 99%

Section: Tph Removal In the Reaction Tankmentioning

confidence: 99%

Biodegradation of Effluent Contaminated With Diesel Oil and Gasoline Using Chitosan as a Natural Coagulant in a Continuous Process

Oliveira

Cardoso

Vieira

et al. 2016

Braz. J. Chem. Eng.

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“…Inorganic flocculants include salts of polyvalent cations, such as Al 2 (SO 4 ) 3 , Fe 2 (SO 4 ) 3 , and FeCl 3 . Natural coagulants of vegetable and mineral origin, such as chitosan (a natural, biodegradable, nontoxic polycationic polymer with multiple applications in food, agricultural, pharmaceutical, and chemical industries) have been used for water treatment and microalgal biomass recovery …”

Section: Introductionmentioning

confidence: 99%

Maximum microalgae biomass harvesting via flocculation in large scale photobioreactor cultivation

et al. 2016

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This study evaluated the ability of Tanfloc SG flocculation to recover microalgae biomass cultivated in a tubular photobioreactor using swine wastewater effluent as the culture media in a pilot‐scale microalgae production plant. The objective function was the flocculation efficiency (ηf), which was evaluated by central composite design (CCD) experiments which varied the Tanfloc concentration (TC) and pH. Subsequently, the biomass recoveries of highly efficient flocculants recommended by the literature and the CCD conditions of Tanfloc were compared. The maximum flocculation efficiency (96.7 ± 1.0 %) was obtained for the following optimal conditions: 210 mg/L Tanfloc concentration, pH 7.8. After jar test experiments, the scale‐up of the process was performed by using the best obtained results and applying Tanfloc in a 1 m3 flocculator where the complementary analyses demonstrated efficient nitrogen, carbon, and biomass removal. The flocculation efficiency obtained with Tanfloc was equivalent to that of most conventional flocculants currently used. However, Tanfloc presented the following economic advantages with respect to other flocculants: i) its nontoxic nature allows for low‐cost disposal; and ii) its low market price makes it a promising alternative for harvesting microalgae biomass.

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“…O efluente gerado em terminais de distribuição de combustíveis terrestre geralmente tem uma elevada carga orgânica. Esta carga orgânica é difícil de ser degradada por microorganismos porque contém constituintes de hidrocarbonetos da gasolina e do óleo diesel (VIEIRA et al, 2012).…”

Section: Introductionunclassified

Estudo Do Processo De Purificação De Efluentes Oleosos Da Indústria De Petróleo

Meili¹,

Filho²,

Carvalho³

et al. 2015

Anais Do XXXVII Congresso Brasileiro De Sistemas Particulados

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RESUMODerivados do petróleo, tais como óleos lubrificantes, gasolina, óleo diesel e seus compostos orgânicos constituintes, são poluentes de difícil degradação, constantemente liberados nas bacias hidrográficas, como resultado de diferentes atividades industriais, provocando sérios problemas de poluição à vida aquática. A crescente preocupação com o meio ambiente tem intensificado o estudo de técnicas de remoção destas cargas poluidoras dos efluentes. Neste sentido, a filtração tem se destacado, pois se apresenta como um método eficaz, simples e econômico. Tem sido intensificada a pesquisa por materiais filtrantes de baixo custo e reutilizáveis em outras funções, tendo seu valor agregado aumentado pelo processo de filtração. Uma vez que o bagaço de cana é abundante no país, possui elevada área superficial e é altamente hidrofóbico, seu uso como leito filtrante de contaminantes orgânicos tem despertado interesse da comunidade acadêmica. Este trabalho tem por objetivo o estudo de uma nova metodologia para remoção de teores de óleos e graxas, utilizando processo de filtração. Os resultados obtidos mostraram a eficácia do bagaço de cana como meio filtrante. A remoção do teor de óleos e graxas aumentou à medida que foram realizadas as corridas com o aumento da compactação do leito.

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Sedimentation of mixed cultures using natural coagulants for the treatment of effluents generated in terrestrial fuel distribution terminals

Cited by 15 publications

References 23 publications

Biodegradation of Effluent Contaminated With Diesel Oil and Gasoline Using Chitosan as a Natural Coagulant in a Continuous Process

Biodegradation of Effluent Contaminated With Diesel Oil and Gasoline Using Chitosan as a Natural Coagulant in a Continuous Process

Maximum microalgae biomass harvesting via flocculation in large scale photobioreactor cultivation

Estudo Do Processo De Purificação De Efluentes Oleosos Da Indústria De Petróleo

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