Potential of the microalgae Chlorella fusca (Trebouxiophyceae, Chlorophyta) for biomass production and urban wastewater phycoremediation

Arrojo, María Ángeles; Regaldo, Luciana; Orquín, Jesús Calvo; Figueroa, Félix L.; Abdala-Díaz, Roberto

doi:10.1186/s13568-022-01384-z

Cited by 14 publications

(3 citation statements)

References 57 publications

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“…The results of recent work performed by Lavrinovičs et al [ 50 ] showed that phosphorus deficiency in the nutrient medium increased protein accumulation and the rate of phosphorus uptake by the C. vulgaris culture, which can be considered a strategy for advanced wastewater treatment. Arrojo et al [ 51 ] observed the maximum protein content in the biomass of Chlorella fusca (50.5%) when grown in 75% wastewater. As a result of continuous cultivation of C. sorokiniana in mixed industrial and municipal wastewater in lab-scale flat-panel photobioreactors, the average yield of protein was 0.39 g per gram of dry biomass [ 43 ].…”

Section: Resultsmentioning

confidence: 99%

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

Bulynina

Ziganshina

Ziganshin

2023

BioTech

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Incorporating a variety of microalgae into wastewater treatment is considered an economically viable and environmentally sound strategy. The present work assessed the growth characteristics of Chlorella sorokiniana during cultivation in balanced synthetic media and domestic wastewater. Increasing the NH4+–N concentration to 360 mg L−1 and adding extra PO43−–P and SO42−–S (up to 80 and 36 mg L−1, respectively) contributed to an increase in the total biomass levels (5.7–5.9 g L−1) during the cultivation of C. sorokiniana in synthetic media. Under these conditions, the maximum concentrations of chlorophylls and carotenoids were 180 ± 7.5 and 26 ± 1.4 mg L−1, respectively. Furthermore, when studying three types of domestic wastewaters, it was noted that only one wastewater contributed to the productive growth of C. sorokiniana, but all wastewaters stimulated an increased accumulation of protein. Finally, the alga, when growing in optimal unsterilized wastewater, showed a maximum specific growth rate of 0.73 day−1, a biomass productivity of 0.21 g L−1 day−1, and 100% NH4+–N removal. These results demonstrate that the tested alga actively adapts to changes in the composition of the growth medium and accumulates high levels of protein in systems with poor-quality water.

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Section: Resultsmentioning

confidence: 99%

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

Bulynina

Ziganshina

Ziganshin

2023

BioTech

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“…The Chl A and Chl B can serve as an indicator of the sensitivity of the light-harvesting complex II (LHCII) enzyme system in chloroplasts in response to external factors (Negi et al 2020). A modi cation in chlorophyll production signi es a change in the stoichiometric balance between the reaction center complexes of both photosystems and the light-collecting complex of photosystem II (Arrojo et al 2022). In this study, photosynthetic pigment production was reduced considerably for the test groups under UVAR conditions than the VL conditions, which can be attributed to the increased accumulation of ROS in algal cells.…”

Section: Discussionmentioning

confidence: 99%

The comparative effects of visible light and UV-A radiation on the combined toxicity of P25 TiO2 nanoparticles and polystyrene microplastics on Chlorella sp.

Rex M,

Mukherjee

2023

Environ Sci Pollut Res

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The ubiquitous presence of TiO 2 nanoparticles (nTiO 2 ) and microplastics (MPs) in marine ecosystems has raised serious concerns about their combined impact on marine biota. In the natural environment, marine microalgae can interact with mixtures of nTiO 2 and MPs under both visible light and UV-A radiation conditions. However, most of the previous toxicity studies employed visible light conditions, so the in uence of UV-A radiation on toxicity remains poorly understood. To address this gap, the current study aimed to compare the effects of visible light and UV-A radiation on the combined toxic effects of nTiO 2 and polystyrene microplastics (PSMPs) in the marine microalga Chlorella sp using arti cial seawater directly as the test medium. Our results demonstrated that under UV-A radiation the algal growth inhibition was signi cantly enhanced compared to that in visible light conditions. The mixtures of nTiO 2 and PSMPs exhibited signi cant enhanced toxicity than their pristine forms. Speci cally, the mixtures of nTiO 2 and NH 2 -functionalized PSMPs (10mg/L) showed higher toxicity to algae than the mixtures with COOH-functionalized PSMPs (10mg/L). Furthermore, UV-A radiation exacerbated the hetero aggregation between algae and pollutants. The photoactive nTiO 2 , promoted increased production of reactive oxygen species under UV-A exposure resulting in cellular damage, lipid peroxidation, and impaired photosynthesis. The effects were more pronounced in case of the mixtures where PSMPs added to the oxidative stress. The toxic effects of the binary mixtures of nTiO 2 and PSMPs were further con rmed through the Field Emission Electron Microscopy, revealing speci c morphological abnormalities. This study provides valuable insights into the potential risks associated with the combination of nTiO 2 and MPs in marine environments, considering the in uence of environmentally relevant light conditions and the test medium.

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“…Wastewater characteristics are one of the factors that have been studied. One recent study investigated the implications of urban wastewater concentration and induced stress on the growth of Chlorella fusca [26]. Using real wastewater instead of synthetic wastewater is another recent research focus on the growth study of C. vulgaris and its bioremediation of primary (PE) and secondary (SE) urban effluents [27].…”

Section: Introductionmentioning

confidence: 99%

The Biological Performance of a Novel Electrokinetic-Assisted Membrane Photobioreactor (EK-MPBR) for Wastewater Treatment

2022

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Developing an effective phycoremediation system, especially by utilizing microalgae, could provide a valuable approach in wastewater treatment for simultaneous nutrient removal and biomass generation, which would help control environmental pollution. This research aims to study the impact of low-voltage direct current (DC) application on Chlorella vulgaris properties and the removal efficiency of nutrients (N and P) in a novel electrokinetic-assisted membrane photobioreactor (EK-MPBR) in treating synthetic municipal wastewater. Two membrane photobioreactors ran in parallel for 49 days with and without an applied electric field (current density: 0.261 A/m2). Mixed liquid suspended soils (MLSS) concentration, chemical oxygen demand (COD), floc morphology, total phosphorus (TP), and total nitrogen (TN) removals were measured during the experiments. The results showed that EK-MPBR achieved biomass production comparable to the control MPBR. In EK-MPBR, an over 97% reduction in phosphate concentration was achieved compared to 41% removal in the control MPBR. The control MPBR outperformed the nitrogen removal of EK-MPBR (68% compared to 43% removal). Induced DC electric field led to lower pH, lower zeta potential, and smaller particle sizes in the EK-MPBR as compared with MPBR. The results of this novel study investigating the incorporation of Chlorella vulgaris in an electrokinetic-assisted membrane photobioreactor indicate that this is a promising technology for wastewater treatment.

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Potential of the microalgae Chlorella fusca (Trebouxiophyceae, Chlorophyta) for biomass production and urban wastewater phycoremediation

Cited by 14 publications

References 57 publications

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

Growth Efficiency of Chlorella sorokiniana in Synthetic Media and Unsterilized Domestic Wastewater

The comparative effects of visible light and UV-A radiation on the combined toxicity of P25 TiO2 nanoparticles and polystyrene microplastics on Chlorella sp.

The Biological Performance of a Novel Electrokinetic-Assisted Membrane Photobioreactor (EK-MPBR) for Wastewater Treatment

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