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Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology

González-Delgado, Angel Darío; Barajas Solano, andres F; ZUORRO, Antonio; Mena Lopez, Nelson Osvaldo; Ortegón Diaz, Manuel Alejandro; Garcia, Janet Bibiana; Lavecchia, Roberto (Journal of Engineering Science and TechnologyMalasia, 2019-02)

Microalgae are an attractive source of metabolites, such as lipids, proteins, pigments and carbohydrates, of potential interest to the pharmaceutical, food and energy sectors. The aim of this study was to evaluate the ...
Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP

ZUORRO, Antonio; Barajas Solano, andres F; Mena, Nelson Osvaldo; González-Delgado, Angel Darío; Ortegón, Manuel Alejandro; Sanguino, Paola Andrea; Lavecchia, Roberto (ARPN Journal of Engineering and Applied Sciences, 2018-08)

Microalgae have recently emerged as an attractive source of products for the food, energy and pharmaceutical industries due to their high biomass productivity, metabolic versatility and environmental sustainability. This ...
Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks

ZUORRO, Antonio; González-Delgado, Angel Darío; García-Martinez, Janet; Lavecchia, Roberto; L’Abbate, Pasqua (ProcessesSuiza, 2019-11-03)

Corn husks are an important byproduct of the corn processing industry. Although they are a rich source of bioactive compounds, especially flavonoids, corn husks are usually disposed of or used as animal feed. In this paper, ...
Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803

García-Martinez, Janet; Quintero, viviana; Contreras Ropero, Jefferson Eduardo; Barajas Solano, andres F; Barajas, Crisostomo; Lavecchia, Roberto; ZUORRO, Antonio (WaterSuiza, 2019-07-24)

This study investigates distillery wastewater, commonly known as vinasse, as a potential culture medium for the production of Chlorella vulgaris and its most relevant metabolites. The effect of vinasse concentration on the ...

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Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology
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González-Delgado, Angel Darío | 2019-02

Microalgae are an attractive source of metabolites, such as lipids, proteins, pigments and carbohydrates, of potential interest to the pharmaceutical, food and energy sectors. The aim of this study was to evaluate the effect of flocculation on lipid extraction from Chlorella Vulgaris. A 33 experimental design was performed with STATISTICA 7.0 software in order to determine the effects of flocculant (AlCl3) addition, pH and time. The best strategy of pH adjustmentflocculant addition was evaluated, followed by lipid extraction under optimal conditions. pH adjustment after the addition of flocculant provided higher flocculation efficiencies (87.2-98.9%) compared to adjustments made before adding the flocculant (67.8-85.9%). Experiments performed according to the experimental design led to a flocculation efficiency of 99.7% when 100 mg/L of AlCl3, pH 7 and a cultivation time of 18.3 days were used. The percentage of a lipid extract from the flocculated biomass was 2.7% and the flocculant did not affect the production of fatty acid methyl esters.

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Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP
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ZUORRO, Antonio | 2018-08

Microalgae have recently emerged as an attractive source of products for the food, energy and pharmaceutical industries due to their high biomass productivity, metabolic versatility and environmental sustainability. This work focuses on the effect of flocculation on the harvesting of microalgae Nannochloropsissp. Through a three-factor experimental design. The most suitable conditions for flocculation were determined based on flocculant (AlCl3) dosage, pH and culture time. In addition, flocculant adding-pH adjustment methods were studied and harvesting was performed according to the method that provided the best results. The pH adjustment after flocculant addition showed higher flocculation efficiency (above 90%) compared to the reverse process. It was also found that the microalgae cells exhibited spontaneous sedimentation, suggesting that the use of flocculant is not required for biomass collection.

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Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks
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ZUORRO, Antonio | 2019-11-03

Corn husks are an important byproduct of the corn processing industry. Although they are a rich source of bioactive compounds, especially flavonoids, corn husks are usually disposed of or used as animal feed. In this paper, we investigate their recovery by an enzyme-assisted extraction process consisting of a pretreatment of the plant material with cellulase followed by solvent extraction with aqueous ethanol. A four-factor, three-level Box–Behnken design combined with the response surface methodology was used to optimize the enzyme dosage (0.3–0.5 g/100 g), incubation time (1.5–2.5 h), liquid-to-solid ratio (30–40 mL g^(-1) ) and ethanol concentration in the solvent (60–80% v/v). Under the optimal conditions, about 1.3 g of total flavonoids per 100 g of dry waste were recovered. A statistical analysis of the results was performed to provide a quantitative estimation of the influence of the four factors, alone or in combination, on the extraction yields. Overall, the results from this study indicate that corn husks are a valuable source of flavonoids and that they can be easily recovered by a sustainable and environmentally friendly extraction process.

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Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803
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García-Martinez, Janet | 2019-07-24

This study investigates distillery wastewater, commonly known as vinasse, as a potential culture medium for the production of Chlorella vulgaris and its most relevant metabolites. The effect of vinasse concentration on the composition of the biomass (proteins, carbohydrates, and lipids) was evaluated in treatments performed in 6-L tubular air-lift reactors. The reactors were operated at 25 ◦C for 18 days, in total darkness, under a continuous flow of air. Results showed a rapid growth of microalgae in the first ten days, when an average production of 0.87 g/L was reached. Then, the daily biomass productivity began to decrease, up to an average value of 11.8 g/L at the 16th day. For all treatments, there was a significant reduction in the concentration of most metabolites in the first eight days. This was likely due to the adaptation of the biomass to the new conditions, with a transition from autotrophic to heterotrophic metabolism. From the 10th day, the concentration of metabolites in the biomass began to increase, reaching a nearly constant value at the 16th day. The observed maximum concentrations (%w/w) were: 48.95% proteins, 2.88% xylose, 7.82% glucose, 4.54% arabinose, 8.28% fructose, and 4.82% lipids. These values were only marginally affected by the type of treatment. Overall, the results obtained suggest that vinasse is a promising and sustainable medium for the growth of C. vulgaris and the production of valuable metabolites.

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Listar por autor "Lavecchia, Roberto"

Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology

Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP

Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks

Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803

Envíos recientes

Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology

Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP

Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks

Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803

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Listar por autor "Lavecchia, Roberto"

Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology ﻿

Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP ﻿

Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks ﻿

Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803 ﻿

Envíos recientes

Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology

Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP

Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks

Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803

Portales Institucionales

Effect of flocculation on lipid extraction from Chlorella Vulgaris UTEX 1803 using response surface methodology

Evaluation of the effect of flocculation on harvesting of microalgaenannochloropsis SP

Optimization of Enzyme-Assisted Extraction of Flavonoids from Corn Husks

Vinasse as a Sustainable Medium for the Production of Chlorella vulgaris UTEX 1803