Bioprocess engineering principles of microalgal cultivation for sustainable biofuel production

Behera, Bunushree; Acharya, Anwesha; Gargey, Iragavarapu Akhil; Aly, Nazimdhine; Balasubramanian, P.

doi:10.1016/j.biteb.2018.08.001

Cited by 75 publications

(24 citation statements)

References 238 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Another possibility is the thermochemical conversion of the biomass by gasification, liquefaction, or F I G U R E 4 Diagram of integrated microalgae biorefinery pyrolysis to produce syngas, bio-oil, or biochar (Chai et al, 2021;Nagarajan et al, 2020;Shahid et al, 2020). Nevertheless, these technologies present high production costs that constrain their feasibility (Behera et al, 2018).…”

Section: Products From Microalgae Biomassmentioning

confidence: 99%

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

et al. 2021

View full text Add to dashboard Cite

Although microalgae‐based wastewater treatment has been traditionally carried out in extensive waste stabilization ponds, recent trends focus on the use of microalgae to apply the circular economy principles in the wastewater treatment sector due to the capacity of algae to absorb carbon dioxide while recovering nutrients from sewage. To this aim, the development of new intensive microalgae‐based systems with higher efficiency and level of process control is required. Results obtained for these systems at lab scale are generally promising. However, upscaling to outdoor conditions is often uncertain. Some advances have been made in terms of applying open systems at large scale. However, there are still some issues related to land requirements and the economic feasibility and robustness of the process that have to be overcome to widely implement these systems. This article aims at describing the main design and operating factors regarding outdoor microalgae cultivation. It will also explain some microalgae cultivation technologies to treat wastewater, showing their advantages, disadvantages, and the possibility to treat different wastewater streams with microalgae cultures. Future perspectives of this biotechnology will be commented as well. This article is categorized under: Engineering Water > Engineering Water

show abstract

Section: Products From Microalgae Biomassmentioning

confidence: 99%

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

et al. 2021

View full text Add to dashboard Cite

show abstract

“…(n = 99) for nitrogen (mainly in the form of ammonium) and 6.5 ± 1. stratification [11] and reduced wall fouling. Pure CO2 (99.9%) was added to the airflow through an automatic valve whenever the pH value went over 7.5 to avoid undesirable phenomena such as ammonia volatilisation and phosphorus precipitation [52].…”

Section: Microalgae Culture and Substratementioning

confidence: 99%

“…Microalgae can be cultivated in open ponds or closed photobioreactors (PBRs) [11,12,13]. Open ponds generally present less operating costs than closed systems [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Open ponds generally present less operating costs than closed systems [14,15]. However, the biological process is more difficult to control in open reactors since they are remarkably more affected by ambient factors than closed PBRs [11]. Furthermore, part of the nitrogen (up to 73% according to Romero-Villegas et al [6]) is lost in open systems due to ammonia stripping [16].…”

Section: Introductionmentioning

confidence: 99%

“…Since algae have been reported to respond to light intensity almost instantaneously [28], the temporary lack of light is considered to allow the dark reactions of photosynthesis, which are slower than the light reactions [30], to use the stored energy from light reactions [25] without the addition of extra photons that cannot be used for photosynthesis. In fact, the excess of photons absorbed by microalgae is emitted as heat or fluorescence and reduce photosynthetic efficiency [11,22,31]. In this context, the use of appropriate light-dark (L:D) photoperiods has been reported to reduce the light energy demand with similar or even higher productivity [32,33].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of light intensity, light duration and photoperiods in the performance of an outdoor photobioreactor for urban wastewater treatment

et al. 2019

View full text Add to dashboard Cite

A series of eight experiments were carried out to analyse the effects of light intensity, light duration and photoperiods on a microalgae culture for treating AnMBR effluent at an outdoor photobioreactor (PBR) plant.Improved performance was achieved in terms of nutrient recovery rates, biomass productivity and effluent nutrient concentrations at a higher net photon flux. However, the higher irradiance was also responsible for lower biomass productivity:light irradiance ratios.None of the experiments with different lighting regimes and the same net photon flux showed any significant differences. The data obtained suggest that microalgae performance in this system did not depend on the time of day when light was applied or the length of the photoperiods, but on the net photon flux. No photoinhibiton was * Constant energy consumption of 0.8 KwhSolar light is the most economical option for outdoor microalgae cultivation [24,39], but variations in the weather, day:night cycles and seasonal changes affect light intensity

show abstract

Bioreactors and Operation Modes for Microalgae‐Based Wastewater Treatment

de Andrade,

Medeiros,

de Farias Silva

et al. 2024

Algae Mediated Bioremediation

View full text Add to dashboard Cite

Bioprocess engineering principles of microalgal cultivation for sustainable biofuel production

Cited by 75 publications

References 238 publications

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

Outdoor microalgae‐based urban wastewater treatment: Recent advances, applications, and future perspectives

Effect of light intensity, light duration and photoperiods in the performance of an outdoor photobioreactor for urban wastewater treatment

Bioreactors and Operation Modes for Microalgae‐Based Wastewater Treatment

Contact Info

Product

Resources

About