Evaluation of maintenance energy requirements in the cultivation of Scenedesmus obliquus: effect of light intensity and regime

Sforza, Eleonora; Urbani, Silvia; Bertucco, Alberto

doi:10.1007/s10811-014-0460-x

Cited by 34 publications

(42 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This value for N. salina is higher than the Y G obtained for Chlamydomonas reinhardtii (1.26 g biomass mol −1 , Kliphuis et al 2012) and for other species (between 0.5 and 1.0 g biomass mol −1 ), as reviewed by Cuaresma et al (2009) andZijffers et al (2010), who however reported growth data under higher irradiances, where photoinhibition occurs. On the other hand, the value of Y G found in this work is lower than that obtained for Scenedesmus obliquus in the same experimental system and conditions (2.52 g biomass mol −1 , Sforza et al 2014b).…”

Section: Energy Requirements For N Salina Growth and Maintenancecontrasting

confidence: 82%

“…(3) and the less-thanlinear concentration increase with τ, while at lower ones it gets to zero as τ reaches the wash-out value, so that a maximum must occur in between. Such a productivity maximum is a known in literature, as already reported by Martinez Sancho et al (1999), Ruiz et al (2013) and Sforza et al (2014b) for other species and also in the case of genus Nannochloropsis. In particular, for Nannochloropsis gaditana, a maximum of productivity was found at residence times of 2.85 days (San Pedro et al 2014) and 5 days (Camacho-Rodríguez et al 2014), significantly higher than the ones observed here.…”

Section: Energy Balance Calculationsupporting

confidence: 74%

“…In a perfectly mixed continuous system, at steady-state, the apparent growth rate μ (day −1 ) is equal to the dilution rate, which is the inverse of the hydraulic residence time τ (d) and represents a net growth rate where both growth and maintenance are considered (Van Bodegom 2007, Sforza et al 2014b:…”

Section: Energy Balance Calculationmentioning

confidence: 99%

“…Kliphuis et al (2012) and Sforza et al (2014b) recently applied the Pirt method (1965) to measure the energy requirements for maintenance and the growth of photosynthetic organisms, such as Chlamydomonas reinhardtii and Scenedesmus obliquus. According to these authors, r Ex can be correlated to the growth rate μ:…”

Section: Energy Balance Calculationmentioning

confidence: 99%

“…With the same model, the maintenance kinetic constant μ E was calculated as a function of μ, as reported in Fig. 2c, showing that μ E increases with the specific growth rate, as a result of an increased duplication time and a higher request of energy for protein turnover (Quigg and Beardall 2003;Sforza et al 2014b). Such a result confirms that a significant fraction of energy, ranging between 25 and 55 % of the apparent growth rate, is lost for maintenance in N. salina in the experimental conditions tested.…”

Section: Energy Requirements For N Salina Growth and Maintenancementioning

confidence: 99%

See 4 more Smart Citations

Effect of specific light supply rate on photosynthetic efficiency of Nannochloropsis salina in a continuous flat plate photobioreactor

Sforza

Calvaruso

Meneghesso

et al. 2015

Appl Microbiol Biotechnol

Self Cite

View full text Add to dashboard Cite

In this work, Nannochloropsis salina was cultivated in a continuous-flow flat-plate photobioreactor, working at different residence times and irradiations to study the effect of the specific light supply rate on biomass productivity and photosynthetic efficiency. Changes in residence times lead to different steady-state cell concentrations and specific growth rates. We observed that cultures at steady concentration were exposed to different values of light intensity per cell. This specific light supply rate was shown to affect the photosynthetic status of the cells, monitored by fluorescence measurements. High specific light supply rate can lead to saturation and photoinhibition phenomena if the biomass concentration is not optimized for the selected operating conditions. Energy balances were applied to quantify the biomass growth yield and maintenance requirements in N. salina cells.

show abstract

Section: Energy Requirements For N Salina Growth and Maintenancecontrasting

confidence: 82%

Section: Energy Balance Calculationsupporting

confidence: 74%

Section: Energy Balance Calculationmentioning

confidence: 99%

Section: Energy Balance Calculationmentioning

confidence: 99%

Section: Energy Requirements For N Salina Growth and Maintenancementioning

confidence: 99%

See 3 more Smart Citations

Effect of specific light supply rate on photosynthetic efficiency of Nannochloropsis salina in a continuous flat plate photobioreactor

Sforza

Calvaruso

Meneghesso

et al. 2015

Appl Microbiol Biotechnol

Self Cite

View full text Add to dashboard Cite

show abstract

Spectral Changes by Dye Sensitized Solar Modules Influence the Pigment Composition and Productivity of Arthrospira maxima and Increase the Overall Energy Efficiency

Borella

Vesce

Mariani

et al. 2022

Advanced Sustainable Systems

Self Cite

View full text Add to dashboard Cite

The integration of semi‐transparent photovoltaics (PVs) with photobioreactors (PBRs) is a promising strategy to increase photoconversion efficiency, ensuring simultaneous electricity and algal biomass production. In this study, Arthrospira maxima is cultivated in an integrated system with a dye‐sensitized solar module (DSSM) to the front of the PBR to assess the possible advantages for biomass and phycocyanin production. The application of the DSSM does not influence biomass production, with the remarkable advantage of producing additional electric energy. However, an acclimation of pigment is observed, as DSSM causes a change in the transmitted light spectrum. Further experiments are conducted to investigate the effect of light quality using monochromatic light‐emitting diodes (LEDs) as controls. Phycocyanin‐targeted wavelengths exhibit a major impact on biomass growth and pigment productivity: low intensity enhanced process efficiency, suggesting that low light is preferable to enhance culture performance with respect to white light. The application of third‐generation PVs is only potentially advantageous if the transmission spectra of the module color and its aperture area are carefully designed. The application of monochromatic LEDs on PBRs also highlights the importance of properly managing the operative conditions to avoid energy losses.

show abstract

Population balance modeling of a microalgal culture in photobioreactors: Comparison between experiments and simulations

et al. 2015

Self Cite

View full text Add to dashboard Cite

The growth of Scenedesmus obliquus in photobioreactors was both experimentally investigated and numerically simulated by solving a population balance equation (PBE), accounting for cell growth and division. The PBE is solved using the Finite size domain Complete set of trial functions Method Of Moments (FCMOM) and a wide range of operative conditions, namely both a batch and a continuous reactor under different light intensities, were considered in the experiments and in the numerical simulations. A thorough validation of the mathematical model was performed by comparing the experimental temporal profiles and steady-state values of the cell density, wet weight, cell average mass, and mass distributions of the microalgal culture with the corresponding simulation results. The parameters of the distribution of division mass were identified to fit the experimental data; specifically, from the continuous reactor data, the dependence of the mean division mass from the cell average mass was obtained.

show abstract

Evaluation of maintenance energy requirements in the cultivation of Scenedesmus obliquus: effect of light intensity and regime

Cited by 34 publications

References 33 publications

Effect of specific light supply rate on photosynthetic efficiency of Nannochloropsis salina in a continuous flat plate photobioreactor

Effect of specific light supply rate on photosynthetic efficiency of Nannochloropsis salina in a continuous flat plate photobioreactor

Spectral Changes by Dye Sensitized Solar Modules Influence the Pigment Composition and Productivity of Arthrospira maxima and Increase the Overall Energy Efficiency

Population balance modeling of a microalgal culture in photobioreactors: Comparison between experiments and simulations

Contact Info

Product

Resources

About