Biomitigation of CO2 from flue gas by Scenedesmus obtusiusculus AT-UAM using a hybrid photobioreactor coupled to a biomass recovery stage by electro-coagulation-flotation

Estrada-Graf, Adrián A.; Hernández, Sergio; Morales, Marcia

doi:10.1007/s11356-020-08240-2

Cited by 15 publications

(3 citation statements)

References 58 publications

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“…Here PBR act as a continuous supply of inoculum of target microalgae to sustain microalgae growth and biomass production in an open raceway pond. Cultivation of Scenedesmus obtusiusculus in hybrid photobioreactors showed that biomass concentration of 1.2 g/L with a 0.38/day of specific growth rate, and biomass productivity of 41.8 mg/L/day using flue gas supplementation (Estrada-Graf et al 2020 ).…”

Section: Biorefinery Of Food Industry Wastewater For Production Of Va...mentioning

confidence: 99%

Sustainable microalgal biomass production in food industry wastewater for low-cost biorefinery products: a review

et al. 2022

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Microalgae are recognized as cell factories enriched with biochemicals suitable as feedstock for bio-energy, food, feed, pharmaceuticals, and nutraceuticals applications. The industrial application of microalgae is challenging due to hurdles associated with mass cultivation and biomass recovery. The scale-up production of microalgal biomass in freshwater is not a sustainable solution due to the projected increase of freshwater demands in the coming years. Microalgae cultivation in wastewater is encouraged in recent years for sustainable bioeconomy from biorefinery processes. Wastewater from the food industry is a less-toxic growth medium for microalgal biomass production. Traditional wastewater treatment and management processes are expensive; hence it is highly relevant to use low-cost wastewater treatment processes with revenue generation through different products. Microalgae are accepted as potential biocatalysts for the bioremediation of wastewater. Microalgae based purification of wastewater technology could be a universal alternative solution for the recovery of resources from wastewater for low-cost biomass feedstock for industry. This review highlights the importance of microalgal biomass production in food processing wastewater, their characteristics, and different microalgal cultivation methods, followed by nutrient absorption mechanisms. Towards the end of the review, different microalgae biomass harvesting processes with biorefinery products, and void gaps that tend to hinder the biomass production with future perspectives will be intended. Thus, the review could claim to be valuable for sustainable microalgae biomass production for eco-friendly bioproduct conversions. Graphical abstract

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Section: Biorefinery Of Food Industry Wastewater For Production Of Va...mentioning

confidence: 99%

Sustainable microalgal biomass production in food industry wastewater for low-cost biorefinery products: a review

et al. 2022

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“…with an initial biomass concentration of 0.5 g/L 60) . Nevertheless, it's higher than the reported by Estrada-Graf et al (2020) stated power consumption of 0.27 kWh/kg biomass for harvesting Scenedesmus obtusiusculus, which used an initial biomass concentration of 1 g/L 61) . Based on this analysis, it appears that the power consumption required to harvest D salina at a low concentration is higher compared to a higher microalgae concentration.…”

Section: E Power Consumption Analysismentioning

confidence: 66%

Harvesting of Dunaliela Salina at Low Concentrations using Spiral Electrocoagulation (SEC)

Purwono,

H. Hadiyanto,

Mochamad Arief Budihardjo

2024

Evergreen

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Harvesting of Dunaliella salina at low concentrations is more difficult to collect and requires special harvesting procedures. This is because the microalgae are more dispersed in the culture medium, making it harder to separate from the medium. When microalgae are harvested, it will produce wastewater that contains excess nutrients such as nitrate and phosphorus. Wastewater of microalgae harvesting should not contain microalgae and excess nutrients. These pollutants cause eutrophication of water bodies and ecosystem destruction when left untreated. The aims of the study were to analyze the harvesting efficiency of D salina at low concentrations and evaluation the nutrients in the wastewater produced from D salina harvesting. In this study, we used spiral electrocoagulation (SEC) with variations in voltage (16, 18, and 20 V) and electrolysis times (1, 3, and 5 min), a surface area of 88.13 cm-2, and a stirring speed of 400 rpm. The response surface method was utilized to optimize operating conditions that were CCD-randomized by five levels of two variables. Harvesting of D salina at low concentrations reached a maximum efficiency of 74.6% when voltage was set to 20 V for five minutes with surface area (Fe) 88.13 cm-2, stirring speed = 400 rpm, current intensity = 2.1 A. The power consumption required to harvest D salina at a low concentration, which is 0.426517 kWh/kg biomass, is higher compared to a higher microalgae concentration. Nutrients (nitrate and phosphate) in the wastewater were successfully reduced by 97 % using SEC within one minute under 20 volts applied.

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“…To date, there are few experimental data analysing the possibility of using exhaust gases from biogas combustion in the production processes of microalgae and cyanobacteria [45]. So far, this source of CO 2 has been considered promising, but the assumptions described were not based on research [46,47]. Considering the need to fix CO 2 and the observed dynamics in the development of biogas production and combustion technologies, it is necessary to reliably assess the possibility of using this type of exhaust gas in the processes of intensive biomass production of microalgae and cyanobacteria.…”

Section: Introductionmentioning

confidence: 99%

The Use of the Autotrophic Culture of Arthrospira platensis for CO2 Fixation from Biogas Combustion

Dębowski,

Zieliński,

Vdovychenko

et al. 2024

Processes

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The increased concentration of CO2 in the atmosphere has a strong impact on global warming. Therefore, efficient technologies must be used to reduce CO2 emissions. One of the methods is the biofixation of CO2 by microalgae and cyanobacteria. This is now a widely described technology that can improve the economics of biomass production and reduce CO2 emissions. There are no reports on the possibility of using it to clean exhaust gases from biogas combustion. The aim of the research was to determine the possibility of using Arthrospira platensis cultures to remove CO2 from biogas combustion. The efficiency of biomass production and the effectiveness of biological CO2 fixation were evaluated. The use of exhaust gases led to a more efficient increase in cyanobacterial biomass. The growth rate in the exponential phase was 209 ± 17 mgVS/L·day, allowing a biomass concentration of 2040 ± 49 mgVS/L. However, the use of exhaust gases led to a decrease in the pH of the culture medium and a rapid decline in the Arthrospira platensis population. The cyanobacteria effectively fixed CO2, and its concentration was limited from 13 ± 1% to 1.3 ± 0.7%. There was no influence of the exhaust gases on changes in the qualitative composition of the cyanobacterial biomass. In the culture fed with exhaust gas, the A. platensis population quickly entered the death phase, which requires close monitoring. This is an important indication for potential operators of large-scale photobioreactors.

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Biomitigation of CO2 from flue gas by Scenedesmus obtusiusculus AT-UAM using a hybrid photobioreactor coupled to a biomass recovery stage by electro-coagulation-flotation

Cited by 15 publications

References 58 publications

Sustainable microalgal biomass production in food industry wastewater for low-cost biorefinery products: a review

Sustainable microalgal biomass production in food industry wastewater for low-cost biorefinery products: a review

Harvesting of Dunaliela Salina at Low Concentrations using Spiral Electrocoagulation (SEC)

The Use of the Autotrophic Culture of Arthrospira platensis for CO2 Fixation from Biogas Combustion

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