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Inês Conceição Roberto – One of the best experts on this subject based on the ideXlab platform.

  • Ferulic and p-coumaric acids extraction by Alkaline Hydrolysis of brewer’s spent grain
    Industrial Crops and Products, 2007
    Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição Roberto

    Abstract:

    Abstract This work deals with the Alkaline Hydrolysis of brewer’s spent grain (BSG) for the extraction of ferulic and p- coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 2 3 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student’s t -test revealed a positive influence ( p p -coumaric acids extraction from BSG. Linear models were well fitted ( R 2  > 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p -coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p -coumaric acid per gram of solubilized lignin.

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  • ferulic and p coumaric acids extraction by Alkaline Hydrolysis of brewer s spent grain
    Industrial Crops and Products, 2007
    Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição Roberto

    Abstract:

    Abstract This work deals with the Alkaline Hydrolysis of brewer’s spent grain (BSG) for the extraction of ferulic and p-coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 23 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student’s t-test revealed a positive influence (p   0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p-coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p-coumaric acid per gram of solubilized lignin.

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Solange Inês Mussatto – One of the best experts on this subject based on the ideXlab platform.

  • Ferulic and p-coumaric acids extraction by Alkaline Hydrolysis of brewer’s spent grain
    Industrial Crops and Products, 2007
    Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição Roberto

    Abstract:

    Abstract This work deals with the Alkaline Hydrolysis of brewer’s spent grain (BSG) for the extraction of ferulic and p- coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 2 3 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student’s t -test revealed a positive influence ( p p -coumaric acids extraction from BSG. Linear models were well fitted ( R 2  > 0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p -coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p -coumaric acid per gram of solubilized lignin.

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  • ferulic and p coumaric acids extraction by Alkaline Hydrolysis of brewer s spent grain
    Industrial Crops and Products, 2007
    Co-Authors: Solange Inês Mussatto, Giuliano Dragone, Inês Conceição Roberto

    Abstract:

    Abstract This work deals with the Alkaline Hydrolysis of brewer’s spent grain (BSG) for the extraction of ferulic and p-coumaric acids, compounds of considerable interest for applications in the food, health, cosmetic, and pharmaceutical industries. A 23 full factorial design with three replicates at the center point was used to investigate the simultaneous effects of the variables: NaOH concentration (1.0, 1.5 and 2.0%, w/v), temperature (80, 100 and 120 °C), and reaction time (30, 60 and 90 min), on the Alkaline Hydrolysis. The assays were performed using a solid:liquid ratio of 1:20 (w/w). The Student’s t-test revealed a positive influence (p   0.90) to the experimental data to describe the extraction of these acids as a function of the operational variables employed. The best Alkaline Hydrolysis conditions consisted in using a 2% NaOH concentration, at 120 °C for 90 min. Under these conditions, a liquor containing 145.3 mg/l ferulic acid and 138.8 mg/l p-coumaric acid was obtained. These values corresponded to 9.65 mg ferulic acid and 9.22 mg p-coumaric acid per gram of solubilized lignin.

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Yongyou Hu – One of the best experts on this subject based on the ideXlab platform.

  • recovery of phosphorus and nitrogen from Alkaline Hydrolysis supernatant of excess sludge by magnesium ammonium phosphate
    Bioresource Technology, 2014
    Co-Authors: Wei Bi, Yiyong Li, Yongyou Hu

    Abstract:

    Abstract Magnesium ammonium phosphate (MAP) method was used to recover orthophosphate (PO43−-P) and ammonium nitrogen (NH4+-N) from the Alkaline Hydrolysis supernatant of excess sludge. To reduce alkali consumption and decrease the pH of the supernatant, two-stage Alkaline Hydrolysis process (TSAHP) was designed. The results showed that the release efficiencies of PO43−-P and NH4+-N were 41.96% and 7.78%, respectively, and the pH of the supernatant was below 10.5 under the running conditions with initial pH of 13, volume ratio (sludge dosage/water dosage) of 1.75 in second-stage Alkaline Hydrolysis reactor, 20 g/L of sludge concentration in first-stage Alkaline Hydrolysis reactor. The order of parameters influencing MAP reaction was analyzed and the optimized conditions of MAP reaction were predicted through the response surface methodology. The recovery rates of PO43−-P and NH4+-N were 46.88% and 16.54%, respectively under the optimized conditions of Mg/P of 1.8, pH 9.7 and reaction time of 15 min.

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