The enhancement of rice bran oil quality through a novel moderate biorefining process

Li, Daoming; Zhang, Jiahao; Faiza, Muniba; Shi, Longhua; Wang, Weifei; Liu, Ning; Wang, Yonghua

doi:10.1016/j.lwt.2021.112118

Cited by 15 publications

(3 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rice is one of the most important crops throughout the world, as it contributes towards satisfying the food demand of much of the global population. It is well known that rice production generates a considerable number of by‐products, among which rice bran deserves particular attention (Thao et al ., 2022; Fraterrigo Garofalo et al ., 2021) from both academia and industry due to their expressive content of high‐added‐value phytochemicals (Garba et al ., 2019; Li et al ., 2021; Punia et al ., 2021a; Tangpromphan, Duangsrisai, & Jaree, 2021).…”

Section: Introductionmentioning

confidence: 99%

Fatty acid distillation residues from rice oil bran refining as a source of phytochemicals

Pestana-Bauer

Mendonça

Bruscatto

et al. 2023

Int J of Food Sci Tech

View full text Add to dashboard Cite

SummaryThe aim of this work was to develop an extraction method to recover γ‐oryzanol and tocopherols from the distillation residue of the fatty acids generated during the neutralisation step of the rice bran oil refining process. The phytochemicals extraction was performed with different solvents (chloroform, methanol, methyl ethyl ketone and acetone) at a ratio of 10:1 v/w (solvent: sample), by agitating the mixture for 10 min at room temperature (20 °C ± 2 °C), then stored at −18 °C for 15 h. The γ‐oryzanol and tocopherol content in the extracted fractions were concentrated and quantified using reverse phase high‐performance liquid chromatography coupled with UV–vis and fluorescence detector, respectively. It was observed that only one step of extraction with methanol resulted in an increased concentration of tocopherols for about six times, with a recovery of 51.50%. However, using two stages of extraction, the mixture of methanol and methyl ethyl ketone (1:1, v/v) allowed the recovery of 92.15% of tocopherols and 84.12% of γ‐oryzanol, increasing the initial concentration of these phytochemicals in about three times. These results show that there is a great possibility of these phytochemicals recovery from the distillation residue from fatty acid recovery.

show abstract

Section: Introductionmentioning

confidence: 99%

Fatty acid distillation residues from rice oil bran refining as a source of phytochemicals

Pestana-Bauer

Mendonça

Bruscatto

et al. 2023

Int J of Food Sci Tech

View full text Add to dashboard Cite

show abstract

“…Despite its advantageous nutritional benefits and wide application prospects, RBO remains underutilized. The average annual production of rice bran is approximately 210 million tons 4) . By this estimate, 2.3 million tons of RBO could be made from rice bran.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Composite Decolorizer Efficacy Based on Decolorization Efficiency, Toxicity, and Nutritional Value of Rice Bran Oil

Sun,

Gao,

et al. 2023

J. Oleo Sci.

View full text Add to dashboard Cite

development of this industry. Unrefined RBO contains free fatty acids, harmful substances, and pigments. The refining process consists of a series of purification steps 5) , of which decolorization is at the centerfold. Because the color of crude RBO is not appealing to consumers, its removal during refinement is essential. However, the decolorization process may result in the loss of nutrients such as sterols, oryzanol, and VE 6) , which should be retained in the final product. The oil refining process also produces harmful

show abstract

“…The enzymatic hydrolysis was previously used for the production of FFAs and fatty acid esters from RBAO (Ghosh & Bhattacharyya, 1995) , nonetheless, its effects on γ-oryzanol remaining in the product have not been reported. Recently, (D. Li et al, 2021) showed that mild reaction conditions of enzymatic deacidification and degumming of crude RBO led to the high retention levels of γ-oryzanol (ca. 70%), while the enzymatic deacidification described in the study by (Sun et al, 2021) did not noticeably affect γ-oryzanol content.…”

Section: Introductionmentioning

confidence: 99%

Enzymatic pretreatment of rice bran acid oil before ?-oryzanol recovery

Yahya

View full text Add to dashboard Cite

This study aims to apply enzymatic reactions for pretreating the major byproduct of rice bran oil (RBO) industry, rice bran acid oil (RBAO) before ?-oryzanol recovery. RBAO contains free fatty acids (FFAs), glycerides, and is rich in the super-antioxidant, ?-oryzanol. As a primary step to recover ?-oryzanol from RBAO, glycerides must be removed because of having similar polarity with ?-oryzanol. This study is conducted in two parts, hydrolysis and esterification/transesterification. In the first part, enzymatic hydrolysis. The study evaluates the performance of operating conditions using one factor at a time (OFAT) on the reaction time, temperature, lipase loading, water:RBAO ratio, and speed where glycerides removal and ?-oryzanol loss are measured as responses. From these, Face-centered central composite rotatable design (FCCD) was used to investigate the effects of three independent variables: time, temperature, and water:RBAO ratio, and their interactions on the responses: glyceride removal, ?-oryzanol loss, and FFAs production, and to determine the statistical models describing their relationships. In addition, by applying the desirability function approach, the optimal location was identified, corresponding to maximal glyceride removal with an imposed upper limit of 35% ?-oryzanol loss. Lastly, the last section is the confirmation of the validity of the model and at an established optimal condition of 22 h, 48.5 ?C and 1:1 water:RBAO ratio, confirmed the validity of the models: glyceride removal approached completion (99%), ?-oryzanol loss was as low as 32%, and the FFAs production was 7375%. Then the second part is enzymatic esterification/transesterification. First is to evaluate the performance of operating conditions using OFAT of ethanol to RBAO molar ratio, temperature, time of reaction, lipase loading, and speed on the glycerides removal, Fatty acid ethyl ester (FAEE/biodiesel), ?-oryzanol loss, and FFAs remaining. Two optimal conditions at 40?C, 3:1 and 5:1 mol ratio of ethanol to RBAO,10% of lipase loading,200 rpm, and 18 and 24 h reaction time, respectively with >98% glyceride removal. Then, the extraction of ?-oryzanol from FAEE using aqueous ethanolic NaOH is conducted and resultant that around 90% of ?-oryzanol can be extracted at 2M. As a primary step to recover ?-oryzanol from RBAO, glycerides must be removed by conversion into more easily separable components such as FFAs or FAEE. The results of this study demonstrated that enzymatic hydrolysis and esterification/transesterification are promising methods for glyceride removal prior to recovery of ?-oryzanol from RBAO and that the statistical models gave accurate predictions of responses and would be useful for further industrial design of the process also is environmentally friendly biocatalysts. Further modifications in the process may be needed to reduce the content of glycerides. Moreover, the losses of ?-oryzanol from these two methods are much better than the conventional method and are interesting to explore further.�

show abstract

The enhancement of rice bran oil quality through a novel moderate biorefining process

Cited by 15 publications

References 29 publications

Fatty acid distillation residues from rice oil bran refining as a source of phytochemicals

Fatty acid distillation residues from rice oil bran refining as a source of phytochemicals

Optimization of Composite Decolorizer Efficacy Based on Decolorization Efficiency, Toxicity, and Nutritional Value of Rice Bran Oil

Enzymatic pretreatment of rice bran acid oil before ?-oryzanol recovery

Contact Info

Product

Resources

About