Anaerobic digestion of vinasse from sugarcane biorefineries in Brazil from energy, environmental, and economic perspectives: Profit or expense?

Moraes, Bruna de Souza; Junqueira, Tassia L.; Pavanello, Lucas G.; Cavalett, Otávio; Mantelatto, Paulo E.; Bonomi, Antonio; Zaiat, Marcelo

doi:10.1016/j.apenergy.2013.07.018

Cited by 286 publications

(196 citation statements)

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“…Lebrero et al (2016) also reported that PBR supported CO2 removal of 23 ± 11.8%, increasing to 62% at pH of 8.1, with an overall fixation rate of 285 mg CO2 L −1 day −1 , thus, it could be coupled with a BTF to upgrade AD-generated biogas, removing inert gases and sulfur-rich compounds. Overall, AD of vinasse could generate approximately 4.5 MW yearly, which would correspond to over 14.5 million m 3 of biogas, with concentrations of 60% CH4, replacing up to 12% of the bagasse from burning to combined heat and power operations (Moraes et al, 2014). AD in a large-scale sugarcane ethanol plant has a potential of supplying electricity to a city of 130,000 inhabitants or a replacement up to 40% of the annual diesel supply in the agricultural energy requirements of a sugarcane biorefinery (Moraes et al, 2014).…”

Section: Ad Of Vinasse: Operation Energy Generation and Digestate Usementioning

confidence: 99%

“…Overall, AD of vinasse could generate approximately 4.5 MW yearly, which would correspond to over 14.5 million m 3 of biogas, with concentrations of 60% CH4, replacing up to 12% of the bagasse from burning to combined heat and power operations (Moraes et al, 2014). AD in a large-scale sugarcane ethanol plant has a potential of supplying electricity to a city of 130,000 inhabitants or a replacement up to 40% of the annual diesel supply in the agricultural energy requirements of a sugarcane biorefinery (Moraes et al, 2014). Therefore, optimization and widespread use of AD in sugarcane ethanol plants still remain as opportunities.…”

Section: Ad Of Vinasse: Operation Energy Generation and Digestate Usementioning

confidence: 99%

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Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Reis

2017

Front. Energy Res.

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Ethanol production from sugarcane in Brazil is a well-established industry, with relatively simple operations and high yield. The ethanol primarily serves as a renewable fuel blending with gasoline and diesel to increase the energy security in Brazil. Several environmental concerns are emerged around the by-products from this industry. Vinasse, the liquid fraction generated from the rectification and distillation operations of ethanol, is a sulfur-rich, low pH, dark-colored, and odorous effluent, produced at volumes as high as 20-fold of ethanol. Traditional wastewater treatments, such as bioprocessing, advanced oxidative processes, anaerobic digestion (AD), and chemical-based processes, have been applied to vinasse management. Despite most of its utilization being in fertirrigation practices, vinasse may represent a key factor in enhancing profitability and environmental outcomes of a sugarcane-to-ethanol plant. The application of some upgrade solutions to sugarcane-derived vinasse may represent additional sources of energy, production of animal feed components, and reduction in water consumption within a plant. The use of mature technologies, yet not widespread in the sugarcane-to-ethanol industry, could help attenuate environmental concerns. Oxidation and chemical processes, AD, and microbial fermentation have been presented as alternative impactful alternatives to (i) reduce its organic and mineral load, converting it to a feedstock with fewer environmental applications when applied as fertilizer and (ii) to convert organic matter and nutrients to a nutritious biomass, simultaneously increasing water reclamation potential by plants. This mini-review article provides a critical and comprehensive summary of the alternatives developed or under development to vinasse management.

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Section: Ad Of Vinasse: Operation Energy Generation and Digestate Usementioning

confidence: 99%

Section: Ad Of Vinasse: Operation Energy Generation and Digestate Usementioning

confidence: 99%

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Reis

2017

Front. Energy Res.

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“…dos impactos ambientais devido ao descarte inapropriado dos resíduos da produção de etanol (MORAES et al, 2014), processos de digestão anaeróbios têm sido apresentados como opções favoráveis à produção de gases para a geração de energia elétrica. Diversos autores têm avaliado processos para obter maior rendimento dos gases hidrogênio (H 2 ) e metano (CH 4 ) (LEITE et al, 2015;REIS et al, 2015;LAZARO;SANTOS et al, 2014;BONOMI, 2015;FERRAZ JR. et al, 2014;POMPERMAYER;PAULA JR., 2000).…”

Section: Resíduos Da Cogeração De Energia Elétricaunclassified

Impactos Ambientais Na Produção Do Etanol Brasileiro: Uma Breve Discussão Do Campo À Indústria

Pugliese

Lourencetti

Ribeiro³

2017

RBM

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ResumoO Programa Nacional Pró-álcool foi criado em 1975, período de crise de petróleo e de baixa produção de petróleo no Brasil. Uma vez que os fatores ambientais não eram relevantes para o design do projeto, este trabalho tem como objetivo identificar os principais impactos ambientais causados pela produção agrícola e industrial da produção de etanol, assim como apontar medidas de mitigação que têm sido apresentadas na literatura. O delineamento do estudo foi realizado pela análise qualitativa do material obtido em revisão bibliográfica. Durante a produção agrícola, os principais impactos ambientais encontrados foram a compactação dos solos por tratores e implementos agrícolas, a contaminação de corpos d'água e solos pelo uso intensivo de fertilizantes e agrotóxicos, aplicação não controlada de vinhaça, torta de filtro ou escórias de siderurgia e poluição do ar resultante das queimadas da palha da cana-de-açúcar. Durante a produção industrial, os principais impactos ambientais apontados relacionam-se com a poluição de ar proveniente da queima do bagaço e palhada excedente para geração de energia elétrica e cinzas dessa queima; com o descarte inadequados da água de lavagem da cana e de equipamentos, das águas residuais de condensadores e multijatos e das águas residuais domésticas. As discussões apresentadas demonstram que a produção de etanol pode gerar impactos desconhecidos pela maior parte da população, tanto na produção agrícola, quanto na produção industrial, podendo ocasionar poluição atmosférica e dos recursos hídricos. Medidas de mitigação, como biodegradação da vinhaça e produção de gases para geração de energia, diminuição do consumo e reuso da água, também são apontadas.Palavras-chave: Impactos ambientais; Produção de Etanol; Desenvolvimento Sustentável. Environmental impacts in the brazilian ethanol production: from field to industry AbstractThe National Alcohol Program (Proálcool) was created in 1975, period of oil crisis and low oil production in Brazil. Since environmental factors were not relevant for the project design, this study aims to identify the main environmental impacts due to agricultural and industrial production of ethanol, as well as to point out mitigation measures that have been presented in the literature. The study design was carried out by a qualitative analysis of material obtained in literature. During agricultural production, the main environmental impacts were: soil compaction by tractors and agricultural implements, contamination of water bodies and soil due to intensive use of fertilizers and pesticides, uncontrolled application of vinasse filter cake or steel lag and air pollution resulting from the burning of sugarcane straw. During the industrial production, the main environmental impacts are related to the air pollution originated from the burning of bagasse and straw for power generation and the release of burning ashes; to the inadequate disposal of effluent generated from the water of sugarcane and washing of equipments; to the residual waters from capacitors and m...

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“…While 1G sugarcane stillage disposal is regulated by law due to its toxic environmental impact, 2G sugarcane stillage is used for fertirrigation of the sugarcane field [2]. Fertirrigation, as a simple and inexpensive approach, was reported to have a negative environmental impact which can be more harmful especially concerning high dinitrogen monoxide (N 2 O) emissions [4]. Additionally, local communities are facing the problem of a strong unpleasant odor of the stillage.…”

Section: Introductionmentioning

confidence: 99%

Estimating the elemental biomass composition of Desmodesmus sp. cultivated in sugarcane stillage

Tasić¹,

Rios²,

Santos³

et al. 2016

Adv techn

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Cultivating algae on various stillage types present an alternative to current stillage application for fertirrigation of the sugarcane. The objective of this study was to determine how algal concentration, nutrient removal efficiency and elemental composition of Desmodesmus sp. algae change in response to different (raw and digested) types of stillage. Algal biomass was cultivated and harvested at laboratory scale. Obtained concentrations were 0.5 g/L and 0.3 g/L for Desmodesmus sp. grown in raw and digested stillage, respectively. At these concentrations, total carbon (TC) and total nitrogen (TN as Total Kjeldahl Nitrogen or N-TKN) removal from stillage medium accounted 39.78% and 5.58% for raw; 20.83% and 5.43% for digested stillage, respectively. The Desmodesmus sp. used in the present study contained high carbon and oxygen content, similar to other algal species. Calcium, phosphorus, and sulfur were the three most abundant inorganic elements. Both biomasses were free of chlorine and with the low content of potassium. The phosphorous content in both biomasses was in the range of 6.03%-6.84%, which could classify these biomasses as useful plant nutrients.

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Anaerobic digestion of vinasse from sugarcane biorefineries in Brazil from energy, environmental, and economic perspectives: Profit or expense?

Cited by 286 publications

References 39 publications

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Vinasse from Sugarcane Ethanol Production: Better Treatment or Better Utilization?

Impactos Ambientais Na Produção Do Etanol Brasileiro: Uma Breve Discussão Do Campo À Indústria

Estimating the elemental biomass composition of Desmodesmus sp. cultivated in sugarcane stillage

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