Seasonal variability in ethanol concentrations from a dry grind fermentation operation associated with incoming corn variability

Ramchandran, Divya; Johnston, David B.; Tumbleson, Mike E; Rausch, Kent D.

doi:10.1016/j.indcrop.2015.01.029

Cited by 19 publications

(6 citation statements)

References 10 publications

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“…The assay used 3,5‐dinitro salicylic assay with pre‐gelatinized potato starch and maltodextrins as substrate, for α‐amylase and glucoamylase, respectively, incubated for five min. [ 29,30 ]…”

Section: Methodsmentioning

confidence: 99%

Characterization of Amylose Lipid Complexes and Their Effect on the Dry Grind Ethanol Process

et al. 2021

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Amylose lipid complexes (AMLs) are likely to form during liquefaction of ground corn in the dry grind process. AML will form under high temperature (≥ 85 °C) and excess water conditions, due to interaction of gelatinized starch with corn lipids. AMLs are resistant to α‐amylase action, resulting in a decrease in starch available for enzymatic hydrolysis. This affects sugar available for fermentation and the final ethanol yield. In this study, the effects of liquefaction temperature, corn particle size, slurry solids content, and different commercial α‐amylases on AML formation are evaluated. AML content in post liquefaction solids (liquefact) is found to decrease from 3.46 to 1.00% as corn grind size is increased from 0.5 to 2.5 mm. Across all slurry solids contents tested (25, 32, and 34%), the mean difference in AML content for all three solids contents is 0.61% when liquefaction temperature is increased to 105 from 85 °C. At 85 °C, liquefact from all three α‐amylases used, had similar AML content. However, when liquefaction temperature is increased to 105 °C, enzyme AA2 had lower AML production compared to other amylases. Overall, increasing liquefaction temperature to above 100 °C had the most predominant effect on reducing AML formation. Optimizing liquefaction parameters can help reduce AML formation and may improve profitability of the dry grind ethanol process.

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Section: Methodsmentioning

confidence: 99%

Characterization of Amylose Lipid Complexes and Their Effect on the Dry Grind Ethanol Process

et al. 2021

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“…The selection of the fuzzy category number C and the fuzzy weighted index φ directly affects the output of the continuous classification. The principle of φ selection is greater than 1, and 1.3 is taken here (Schepers et al, 2004;Ramchandran et al, 2015;Hassan et al, 2018). The clustering number is determined by fuzzy clustering index and normalized classification entropy.…”

Section: Partition Methodsmentioning

confidence: 99%

Assessing Ndvi Spatial Pattern Related to Management Zones

LIU¹

2019

Appl. Ecol. Env. Res.

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The NDVI of GreenSeeker has proven to be an effective tool for Management Zoning. An optimal method on the basis of NDVI was proposed to establish Management Zoning accurately in this study. First, the coefficient of variation of time series distance difference of Greenseeker and UAV NDVI was tested, it was significant to evaluate the accuracy of Greenseeker NDVI for large-areas. On this basis, optimal partition numbers and partitioning algorithm were identified according to the Silhouette Coefficient of data structure, the accuracy of estimation of agronomic parameters and the difference of agronomic parameters in each plot under different partition numbers. Results demonstrate that the difference among the points of the distance sequence is not significant (F = 0.641 > 0.05). The NDVI of Greenseeker has high reliability. When the partitioning algorithm and the number of partitions are Kmeans and four, respectively, the Silhouette Coefficient and the accuracy of estimation of agronomic parameters (plant height, nitrogen content) are higher than in other treatments. At the same time, the agronomic parameters in each plot showed the significant differences. The proposed method provides a good prospect to optimize the establishment of management zones.

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“…Assim, resíduos do milho, que são utilizados para fins de produção de biocombustíveis, como o bioetanol, são eficientes na alta cultura (8,00 t/ha) e rendimento (417 L/t) por hectare. O crescimento em longo prazo é um dos maiores obstáculos para a utilização de milho como uma matéria-prima, pois afetam o surgimento de híbridos, porém, isso permite o estudo de diferentes espécies e suas características e propriedades na produção de biocombustíveis (RAMCHANDRAN et al, 2015).…”

Section: Milhounclassified

Cenários E Perspectivas Das Principais Culturas Do Rio Grande Do Sul Em Processos De Biorrefinaria

Faria

Machado

Eichler

et al. 2016

R. Eletr. Cient. da Uergs

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Resumo- o grande desafio da civilização moderna é se tornar uma sociedade mais sustentável, baseada no uso racional dos recursos naturais. Nesse contexto, surgiu o conceito de biorrefinaria, que prevê a conversão da biomassa em biocombustíveis, biomateriais, bioquímicos e bioenergia com baixo desperdício e mínimas emissões. No que diz respeito à produção de biomassas, o Brasil é considerado uma referência mundial pela sua avançada tecnologia agrícola e florestal, vasta disponibilidade de terra arável e condições edafoclimáticas favoráveis em comparação com outras partes do mundo. Nesse cenário, o estado do Rio Grande do Sul é considerado um grande centro para o desenvolvimento, aperfeiçoamento e implementação de tecnologias que visem converter a biomassa lignocelulósica em produtos através da biorrefinaria. Nessa expectativa, o aproveitamento dos resíduos provenientes das culturas de eucalipto, tabaco, milho, uva, soja e arroz que hoje em dia são gerados em quantidades significativas, devem aumentar consideravelmente nos próximos anos, transformando-os de fontes de custos para fontes de receitas. Neste contexto, o objetivo do presente trabalho foi fazer uma revisão do potencial energético e químico das principais culturas do Rio Grande do Sul e sua utilização através dos processos químicos, bioquímicos e termoquímicos.

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Seasonal variability in ethanol concentrations from a dry grind fermentation operation associated with incoming corn variability

Cited by 19 publications

References 10 publications

Characterization of Amylose Lipid Complexes and Their Effect on the Dry Grind Ethanol Process

Characterization of Amylose Lipid Complexes and Their Effect on the Dry Grind Ethanol Process

Assessing Ndvi Spatial Pattern Related to Management Zones

Cenários E Perspectivas Das Principais Culturas Do Rio Grande Do Sul Em Processos De Biorrefinaria

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