CO2 biofixation by Synechococcus elongatus from the power plant flue gas under various light–dark cycles

Hashemi, Ali; Shariati, Farshid Pajoum; Sohani, Elnaz; Azizi, Soroush; Hosseinifar, Seyedeh Zahra; Amrei, Hossein Delavari

doi:10.1007/s10098-020-01912-0

Cited by 16 publications

(5 citation statements)

References 49 publications

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“…The development of advanced cultivation systems like photobioreactors and membrane bioreactors could provide several benefits, such as higher yields of biomass or bioproducts, improved control over growth conditions, and increased efficiency and sustainability of the cultivation process. Additionally, these systems can offer opportunities for research and innovation in the field of biotechnology (Hashemi et al, 2020;Azizi et al, 2021c). For example, Sarma et al ( 2021) investigated a photobioreactor system and the productivity of different microalgae species, including Heterotrophic Chlorella protothecoides and Chlorella vulgaris.…”

Section: High Energy and Cost Requirementsmentioning

confidence: 99%

Grand Challenges in Application of Microalgae for Nutrient Recovery

Azizi Maslaki,

Hashemi kouchaksaraei

2023

JRR

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Microalgae-based wastewater treatment is an emerging technology that utilizes photosynthetic microorganisms to remove pollutants from wastewater (Abdelfattah et al., 2022). This approach has gained attention due to its potential to provide an energy-efficient and sustainable solution to the www.resrecov.com HIGHLIGHTS ➢ Enhanced microalgae cultivation and harvesting methods.➢ Advanced wastewater pre-treatment technologies.➢ Post-treatment for nutrient removal and disinfection.➢ Environmental impact assessment and mitigation strategies.➢ Integration and scalability of microalgae systems.

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Section: High Energy and Cost Requirementsmentioning

confidence: 99%

Grand Challenges in Application of Microalgae for Nutrient Recovery

Azizi Maslaki,

Hashemi kouchaksaraei

2023

JRR

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“…1 CO 2 mitigation strategies are classified into three categories: chemical, 2 physical 3 and biological. 4 Among these, biological techniques using microorganisms are considered an efficient and environmentally-friendly method for C capture. 5 In addition, nutrient concentrations have been increasing in water systems as a consequence of human activities, creating critical challenges for the environment, in particular leading to the negative consequences of eutrophication.…”

Section: Introductionmentioning

confidence: 99%

“…6 Microalgae have gained significant attention during the last decades owing both to their efficient nutrient-removal from urban wastewaters and their CO 2 fixation. 4,7 Several microalgae species have been reported to have the capability for CO 2 fixation and also to grow in urban wastewaters among which Scenedesmus obliquus and Chlorella vulgaris are the most promising candidates. [8][9][10][11][12] Su et al 13 compared the nutrient removal efficiency of high-potential microalgae species C. vulgaris and Scenedesmus rubescens cultivated in secondary effluent urban wastewater, and reported nitrogen (N) and phosphorus (P) removal efficiencies of >99% for both microalgae species.…”

Section: Introductionmentioning

confidence: 99%

Effects of simultaneous CO₂ addition and biomass recycling on growth characteristics of microalgal mixed culture

Fallahi

Hajinajaf

Tavakoli

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND: This study aims to investigate the effect of simultaneous carbon dioxide (CO 2 ) addition and biomass recycling on specific performance parameters (including biomass productivity and harvestability, and species abundance) of the mixed culture of two freshwater microalgae species Chlorella vulgaris and Scenedesmus obliquus in a flat-panel photobioreactor grown semicontinuously using secondary effluent urban wastewater as the culture medium. Recycling a portion of the gravityharvested biomass back to the system has positive effects on biomass productivity and harvestability by letting microalgal cells utilize more of the available light energy and promoting the dominance of settleable microalgal species of S. obliquus (owing to their large cell sizes) in the mixed culture. Furthermore, CO 2 addition could supply the carbon limitation of urban wastewater and boost biomass production. RESULTS:The work confirmed that simultaneous CO 2 addition and biomass recycling improved the biomass productivity by 314%, promoted the dominance of the larger algae species S. obliquus in the mixed culture by 38%, and increased the gravity sedimentation by 85% compared to the control that had no recycling and CO 2 addition. Concerning the secondary effluent urban wastewater, the interaction of CO 2 addition and biomass recycling was insignificant regarding the improvement in nutrient removal efficiency.CONCLUSION: The findings proved the potential benefits of simultaneous biomass recycling and CO 2 addition for reaching a high cell density, and demonstrated its potential for high biomass harvest efficiency in microalgae-based wastewater treatment systems.

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“…Nonetheless, they have disadvantages such as water evaporation, large area requirement, and algal contamination (Chisti 2007;Kunjapur and Eldridge 2010). Photobioreactors (PBRs) are designed to address the open pond limitations through enhancing the photosynthesis efficiency; however, they have potential drawbacks, including difficulties in the scale-up procedure and high cost of construction and operation (Wang et al 2012;Bilad et al 2014b;Hashemi et al 2020b). Membrane photobioreactor (MPBR) technology, which is the combination of conventional PBRs and membrane systems, is employed to grow microalgae and remove contaminants from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Effects of flashing light–emitting diodes (LEDs) on membrane fouling in a reciprocal membrane photobioreactor (RMPBR) to assess nitrate and phosphate removal from whey wastewater

et al. 2021

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Light is one of the most critical factors for the growth of microalgae; therefore, optimization and accessibility of light improve productivity and wastewater nutrient removal is important. The flashing light effect allows microalgae to use light effectively through intermittent exposure. Nutrient assimilation and membrane fouling were considered in a reciprocal membrane photobioreactor (RMPBR) and an LED flashing light was provided as a source of illumination. The objective of this study was to bridge the gap between light delivery and RMPBR performance. In this connection, we examined flashing lights with frequencies of 1 Hz and 1000 Hz at a constant duty cycle of 60% along with continuous light. Regarding the effect of the flashing light on RMPBR, the cells which acclimated to flashing light of 1000 Hz resulted in maximum removal of nitrate (97%) and phosphate (70%). However, the culture with the low frequency of 1 Hz was only able to remove nitrate and phosphate up to 68% and 47%, respectively. Furthermore, the reactor with 1-Hz flashing light frequency was fouled earlier within 84 h thereby reaching the highest pore-blocking. Proteins and carbohydrates were recognized as a major cause of fouling in the lowfrequency flashing light. We conclude that high-frequency flashing light (1000 Hz) could be an effective light condition for nutrient uptake in wastewater treatment.

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CO2 biofixation by Synechococcus elongatus from the power plant flue gas under various light–dark cycles

Cited by 16 publications

References 49 publications

Grand Challenges in Application of Microalgae for Nutrient Recovery

Grand Challenges in Application of Microalgae for Nutrient Recovery

Effects of simultaneous CO₂ addition and biomass recycling on growth characteristics of microalgal mixed culture

Effects of flashing light–emitting diodes (LEDs) on membrane fouling in a reciprocal membrane photobioreactor (RMPBR) to assess nitrate and phosphate removal from whey wastewater

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CO2 biofixation by Synechococcus elongatus from the power plant flue gas under various light–dark cycles

Cited by 16 publications

References 49 publications

Grand Challenges in Application of Microalgae for Nutrient Recovery

Grand Challenges in Application of Microalgae for Nutrient Recovery

Effects of simultaneous CO2 addition and biomass recycling on growth characteristics of microalgal mixed culture

Effects of flashing light–emitting diodes (LEDs) on membrane fouling in a reciprocal membrane photobioreactor (RMPBR) to assess nitrate and phosphate removal from whey wastewater

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Effects of simultaneous CO₂ addition and biomass recycling on growth characteristics of microalgal mixed culture