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Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae

Barajas Solano, andres F; ZUORRO, Antonio; Barajas, Crisóstomo; García-Martinez, Janet; Sanchez-Galvis, Edwar; Castellaños, Miguel A. (Chemical Engineering TransactionsItalia, 2018-05)

Microalgae are considered as one of the most promising alternatives for the integrated use of agro-industrial water residues and the production of metabolites of high industrial interest. This is due to algae can grow on ...
Development of a Selective Method for Metabolites Extraction from Microalgae Biomass

Barajas Solano, andres F; González-Delgado, Angel Darío; Urbina-Suarez, Nestor Andres; Barajas, Crisóstomo; Sanguino, Paola Andrea (Indian Journal of Science and TechnologyIndia, 2018-02)

Background: The production of biofuel and high value products from microalgae exhibits difficulties that have been widely studied to develop viable, efficient and economic methods for recovering metabolites. Objectives: ...
Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries

Guiza, Luisa; Orozco, Luis G.; Sanchez-Galvis, Edwar; García-Martinez, Janet; Barajas, Crisóstomo; ZUORRO, Antonio; Barajas Solano, andres F (Chemical Engineering TransactionsItalia, 2018-05)

The sustained expansion of agricultural industry in Colombian high-mountain has led to an increased size of residues, especially untreated wastewater. This untreated water is an urgent matter for public and environmental ...

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Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae
...
Barajas Solano, andres F | 2018-05

Microalgae are considered as one of the most promising alternatives for the integrated use of agro-industrial water residues and the production of metabolites of high industrial interest. This is due to algae can grow on wastewater which in turn can reduce the emission of nutrients to rivers and lakes. However, the greatest scientific-technological barrier is the concentration and separation of the biomass produced. There are several processes used at different levels (from laboratory to industrial scale) such as flocculation, centrifugation, flotation, etc. These can be very expensive or can (possibly) contaminate the biomass. Unlike the previous ones, electroflotation has been proposed as a cost-efficient method, nevertheless its final efficiency will depend heavily on the type of alga and culture medium. Taking into account the above, the present project aims to design an electroflotation system for the concentration and harvest of microalgae biomass. The effect of several factors (pH, time, voltage and distance between the electrodes) and for types of materials (Copper, Aluminium, Iron and Steel) on biomass recovery efficiency from a culture of Chlorella vulgaris UTEX 1803 was evaluated by the implementation of a Design of experiments (43 non-factorial design) using STATISTICA 7.0. Results show that, the materials with higher concentration efficiency were cooper and aluminium with 40 and 80% respectively, and the most relevant factors were distance between electrodes (1-2 cm), time (>20 min) and Voltage (>15V). In order to increase the efficiency of the overall process a new 43 experimental factorial design was proposed using as factors distance between electrodes, time, voltage and agitation. Results show that agitation positively affects the total efficiency until reaching a total concentration of the biomass (100%). It was found that a voltage close to 50V and a time greater than 25 min positively affect the final efficiency of the copper and aluminium electrodes, however aluminium has the highest efficiency (> 95%) compared to copper (<85%).

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Development of a Selective Method for Metabolites Extraction from Microalgae Biomass
...
Barajas Solano, andres F | 2018-02

Background: The production of biofuel and high value products from microalgae exhibits difficulties that have been widely studied to develop viable, efficient and economic methods for recovering metabolites. Objectives: This work is focused on evaluating experimental methods to obtain carbohydrates, proteins and lipids by varying process variables (solvent concentration, temperature, biomass/solvent ratio and moisture content). Methods/Analysis: Carbohydrate and proteins were extracted by acid and alkaline hydrolysis to study the effect of biomass moisture on recovery of these metabolites. Lipids were obtained using hexane and methanol-chloroform methods and its quantification was performed by gravimetric analysis. Findings: It was found that 41.96% and 49.77% of carbohydrates were recovered from C. vulgaris using biomass without thermal pretreatment by acid and alkaline hydrolysis, respectively. Regarding to lipid extraction, hexane was used as solvent for recovering 18.22% of lipids from C. vulgaris. In addition, results suggested that dehydrating biomass at 105°C reduces recovery of high value products. Novelty/Improvement: This study proposes a selective method for extracting metabolites, which enhances efficiency of recovery when is carried out under suitable conditions of biomass moisture, time and solvent volume.

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Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries
...
Guiza, Luisa | 2018-05

The sustained expansion of agricultural industry in Colombian high-mountain has led to an increased size of residues, especially untreated wastewater. This untreated water is an urgent matter for public and environmental health, not only by its nutrient concentration (composed especially of food residuals and feces) but also the presence of pathogens (virus, bacteria, etc.) which are discharged to the environment. The overall objective of this work is to evaluate the effect of UV-treated wastewater from a high-mountain fishery as culture media for the production of Chlorella vulgaris as a sustainable method for nutrient and water recirculation on the fishery production system. The UV-canal efficiency was evaluated by the implementation of an experimental factorial design (time, distance of the UV-lamps towards the canal, number of UV-lamps and the sample concentration) using STATISTICA 7.0 software. Results shown that time (3 to 5 minutes) and the number of lamps (3-4) of 15 Watts eliminate completely coliforms from the samples. After UV-treatment the resulting water was test as culture media for C. vulgaris production by the adjustment of C/N ratio (Sodium Carbonate/potassium nitrate) by the implementation of an experimental 23 factorial design. Results shown that higher nitrate concentrations (>0,22 g/L) and moderate carbonate concentrations (1 g/L) increase the final biomass concentration up to 4g/L in 20 days.

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Browsing by Author "Barajas, Crisóstomo"

Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae

Development of a Selective Method for Metabolites Extraction from Microalgae Biomass

Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries

Envíos recientes

Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae

Development of a Selective Method for Metabolites Extraction from Microalgae Biomass

Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries

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Browsing by Author "Barajas, Crisóstomo"

Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae ﻿

Development of a Selective Method for Metabolites Extraction from Microalgae Biomass ﻿

Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries ﻿

Envíos recientes

Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae

Development of a Selective Method for Metabolites Extraction from Microalgae Biomass

Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries

Portales Institucionales

Design of an Electroflotation System for the Concentration and Harvesting of Freshwater Microalgae

Development of a Selective Method for Metabolites Extraction from Microalgae Biomass

Production of Chlorella vulgaris Biomass on UV‐treated Wastewater as an Alternative for Environmental Sustainability on High‐Mountain Fisheries