Green microalga Scenedesmus acutus grown on municipal wastewater to couple nutrient removal with lipid accumulation for biodiesel production

Alva, Manuel Sacristán de; Luna-Pabello, Víctor Manuel; Cadena, Erasmo; Ortíz, Edgar

doi:10.1016/j.biortech.2013.07.061

Cited by 143 publications

(29 citation statements)

References 15 publications

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“…3, showing that $50% of the nitrogen was removed from all growth conditions in the first week. This is in agreement with previous studies of Scenedesmus species in wastewater treatment processes (Martínez et al, 2000;Sacristan de Alva et al, 2013). The uptake rates of the different nitrogen sources were similar, suggesting that S. acutus had no apparent bias in assimilating different nitrogen sources.…”

Section: Nutrient Uptakesupporting

confidence: 93%

“…It is likely that this nitrogen is not bioavailable to S. acutus for assimilation as all available nitrate was assimilated by the cells when similar initial levels of TN were used in the media. These levels of TN removal are slightly higher than reported in previous studies (Sacristan de Alva et al, 2013), which may be due to the different cultivation conditions, processing parameters or because the nitrogen recycling of intraspecies biomass may facilitate subsequent assimilation and utilization of the fermentation residues.…”

Section: Nutrient Uptakecontrasting

confidence: 60%

“…Therefore, research into nitrogen recycling is necessary to improve the overall economics of algal biofuel platforms. Previous nitrogen recycling research efforts have included coupling algal growth with wastewater treatment (Pittman et al, 2011;Sacristan de Alva et al, 2013), and using the aqueous phase from hydrothermal liquefaction (HTL) as a biomass fertilizer (Biller et al, 2012;Garcia Alba et al, 2013). Recycling nutrients from methane digesters has also been investigated (Golueke and Oswald, 1959;Habig et al, 1984).…”

Section: Introductionmentioning

confidence: 98%

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Nitrogen recycling from fuel-extracted algal biomass: Residuals as the sole nitrogen source for culturing Scenedesmus acutus

Nagle

Pienkos

et al. 2015

Bioresource Technology

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In this study, the reuse of nitrogen from fuel-extracted algal residues was investigated. The alga Scenedesmus acutus was found to be able to assimilate nitrogen contained in amino acids, yeast extracts, and proteinaceous alga residuals. Moreover, these alternative nitrogen resources could replace nitrate in culturing media. The ability of S. acutus to utilize the nitrogen remaining in processed algal biomass was unique among the promising biofuel strains tested. This alga was leveraged in a recycling approach where nitrogen is recovered from algal biomass residuals that remain after lipids are extracted and carbohydrates are fermented to ethanol. The protein-rich residuals not only provided an effective nitrogen resource, but also contributed to a carbon "heterotrophic boost" in subsequent culturing, improving overall biomass and lipid yields relative to the control medium with only nitrate. Prior treatment of the algal residues with Diaion HP20 resin was required to remove compounds inhibitory to algal growth.

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Section: Nutrient Uptakesupporting

confidence: 93%

Section: Nutrient Uptakecontrasting

confidence: 60%

Section: Introductionmentioning

confidence: 98%

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Nitrogen recycling from fuel-extracted algal biomass: Residuals as the sole nitrogen source for culturing Scenedesmus acutus

Nagle

Pienkos

et al. 2015

Bioresource Technology

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“…At the second stage, no later growth occurred, only slightly increases and decreases of the biomass concentration that varied between 0.811 and 1.15 g/L. Similar biomass results were obtained by Scenedesmus acutus cultured in municipal wastewater by Sacristán de Alva et al (2013). The initial pH of the cultures at the beginning of the second stage was 8.19 ± 0.29.…”

Section: Estimation Of Biodiesel Properties Based On Fame Profilessupporting

confidence: 82%

Wastewater treatment and biodiesel production by Scenedesmus obliquus in a two-stage cultivation process

Álvarez-Díaz

Ruiz

Arbib

et al. 2015

Bioresource Technology

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The microalga Scenedesmus obliquus was cultured in two cultivation stages: (1) in batch with real wastewater; (2) maintaining the stationary phase with different conditions of CO2, light and salinity according to a factorial design in order to improve the lipid content. The presence of the three factors increased lipid content from 35.8% to 49% at the end of the second stage; CO2 presence presented the highest direct effect increasing lipid content followed by light presence and salt presence. The ω-3 fatty acids content increased with CO2 and light presence acting in isolation, nevertheless, when both factors acted together the interaction effect was negative. The ω-3 eicosapentaenoic acid content of the oil from S. obliquus slightly exceeded the 1% maximum to be used as biodiesel source (EU normative). Therefore, it is suggested the blend with other oils or the selective extraction of the ω-3 fatty acids from S. obliquus oil.

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“…The data are mean ± standard deviation of three independent experiments. 24 A novel algal biofilm membrane photobioreactor was developed to culture…”

Section: Discussionmentioning

confidence: 99%

A novel algal biofilm membrane photobioreactor for attached microalgae growth and nutrients removal from secondary effluent

Gao

Yang

et al. 2015

Bioresource Technology

220

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Green microalga Scenedesmus acutus grown on municipal wastewater to couple nutrient removal with lipid accumulation for biodiesel production

Cited by 143 publications

References 15 publications

Nitrogen recycling from fuel-extracted algal biomass: Residuals as the sole nitrogen source for culturing Scenedesmus acutus

Nitrogen recycling from fuel-extracted algal biomass: Residuals as the sole nitrogen source for culturing Scenedesmus acutus

Wastewater treatment and biodiesel production by Scenedesmus obliquus in a two-stage cultivation process

A novel algal biofilm membrane photobioreactor for attached microalgae growth and nutrients removal from secondary effluent

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