Determination of Ca, Mg, Na, and K in Biodiesel of Oilseed from Northern Brazil

Alves, Bianca S. F.; Carvalho, Fábio Israel Martins; Cruz, Allan S.; Filho, Heronides Adonias Dantas; Dantas, Kelly G. F.

doi:10.21577/1984-6835.20180041

Cited by 7 publications

(1 citation statement)

References 9 publications

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“…Calcium, magnesium, sodium, and potassium are inorganic contaminants that, when present in biodiesel, may negatively affect engine performance and contribute to biodiesel decomposition [27]. As shown in Table 1, the contents of calcium and magnesium were almost constant during the year with fluctuating values of potassium observed but still meeting internal limits and having no impact on final biodiesel product properties.…”

Section: Corn Oilmentioning

confidence: 99%

Towards a Valorization of Corn Bioethanol Side Streams: Chemical Characterization of Post Fermentation Corn Oil and Thin Stillage

Lena¹,

Ondrejíčková²,

Pulgar³

et al. 2020

Molecules

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First-generation biofuel biorefineries may be a starting point for the development of new value chains, as their by-products and side streams retain nutrients and valuable molecules that may be recovered and valorized for high-value applications. This study provides a chemical characterization of post-fermentation corn oil and thin stillage, side streams of dry-grind corn bioethanol production, in view of their valorization. An overall long-term study was conducted on the two co-products collected over 1 year from a bioethanol plant. Water content, acid value, sedimentation, mineral composition, and fatty acid profiles were analyzed on post-fermentation corn oil. Results highlighted that its acid value was high (19.72–24.29 mg KOH/g), indicating high levels of free fatty acids, but stable over the year due to standardized operating conditions. The fatty acid profile was that typical of corn oil, with a prevalence of linoleic (54–59% of total fatty acids) over oleic (23–27%) and palmitic (12–17%) acids. Macronutrients, fatty acid, and mineral profiles were investigated in thin stillage. Results revealed the acidic pH (4.05–4.68) and high dilution (90–93% water) of this side stream. The dry mass was composed of fats (19–30%), proteins (8.8–12.8%), ash (8.7–9.5%), and fiber (7.3–9.8%). The concomitant presence of a variegate complex of molecules of nutritional interest in corn bioethanol co-products, with several potential high-value market applications, make the perspective of their recovery a promising strategy to create new cross-sector interconnections according to circular economy principles.

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Section: Corn Oilmentioning

confidence: 99%