New Angled Twin–layer Porous Substrate Photobioreactors for Cultivation of Nannochloropsis oculata

Tran, Hoang-Dung; Ong, Binh-Nguyen; Ngo, Vinh-Tuong; Tran, Dai-Long; Nguyen, Thanh-Cong; Tran-Thi, Bich-Huy; Do, Thanh-Tri; Nguyen, Tran Minh-Ly; Nguyen, Xuan-Hoang; Melkonian, Michael

doi:10.1016/j.protis.2022.125914

Cited by 2 publications

(2 citation statements)

References 62 publications

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“…It is noteworthy that the PBRs and open ponds discussed herein are suspension systems in which microalgal cells are suspended in a cultivation medium. For immobilized (biofilm) systems in which microalgal cells are immobilized and grown on a solid medium, water management, including makeup water, can also be a challenge [33]. However, the findings and discussions acquired from this study may not necessarily apply.…”

Section: Discussionmentioning

confidence: 92%

Makeup Water Addition Can Affect the Growth of Scenedesmus dimorphus in Photobioreactors

et al. 2023

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Makeup water constitutes a key component in the water management of microalgal cultivation systems. However, the effect of makeup water addition on microalgal growth remains largely unexplored. This study compared two deionized water addition intervals (1 day and 4 days) for their effect on the growth of Scenedesmus dimorphus (S. dimorphus hereafter) in 2000 mL Pyrex bottles under controlled conditions. Cell counts and dry algal biomass (DAB) were measured to characterize the microalgal growth rate. Water addition intervals impacted algal cell counts but had little effect on DAB. Adding makeup water every day resulted in a higher growth rate (8.80 ± 1.46 × 105 cells mL−1 day−1; p = 0.22, though) and an earlier occurrence of the peak cell count (day 9) than adding it every 4 days (6.95 ± 1.68 × 105 cells mL−1 day−1 and day 12, respectively). It is speculated that water loss over an extended period and the following makeup water addition posed stress on S. dimorphus. Surpassing the peak cell count, S. dimorphus continued to grow in DAB, resulting in an increased cell weight as a response to nutrient starvation. Optical density at 670 nm (OD670) was also measured. Its correlation with DAB was found to be affected by water addition intervals (R2 = 0.955 for 1 day and 0.794 for 4 days), possibly due to a water loss-induced change in chlorophyll a content. This study is expected to facilitate the makeup water management of photobioreactor and open pond cultivation systems.

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Section: Discussionmentioning

confidence: 92%

Makeup Water Addition Can Affect the Growth of Scenedesmus dimorphus in Photobioreactors

et al. 2023

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“…It is widespread in the marine environment. However, it is also commonly found in freshwater due to its important role in the biogeochemical cycling of carbon and other minerals (Tran et al, 2022). Among the six identified species of the genus is N. oculata, which was originally isolated on the coast of Scotland and has been widely used as a food source in aquaculture, providing a source of omega-3 fatty acids (Ashour et al, 2019;Kagan & Makulta, 2015).…”

Section: Introductionmentioning

confidence: 99%

Removal of organic matter during adaptation of Nannochloropsis oculata in livestock waste

Sales-Pérez,

Sales-Chávez,

Romero-Mota

et al. 2023

Renew. energ. biomass sustain

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Microalgae, like plants, contribute significantly to the development of the oxygen biogeochemical cycle due to their high photosynthetic efficiency. In addition, they provide high yields of polyunsaturated fatty acids, sterols, proteins, terpenoids, and pigments, among others. Therefore, different species of microalgae have been studied and used on a laboratory scale to carry out processes such as wastewater treatment or aerobic bioconversion, which are presented as sustainable and viable alternatives for the treatment and recovery of organic waste (OW), usually rich in carbohydrates, lipids and proteins. In the present investigation, the removal of organic matter was evaluated during the adaptation of Nannochloropsis oculata in residues of poultry wastewater and swine origin, obtained from technical and semi-technical plants, respectively, located in the high mountain zone of the state of Veracruz, Mexico. The experiment was carried out in 250 mL discontinuous photobioreactors with a working volume of 200 mL, where 3 inoculum-substrate ratios were studied for each organic residue: 10, 15 and 20% inoculum in poultry wastewater (PWW) and 30, 50 and 70% inoculum in pig manure (PM). In addition, the conditions of temperature (20 ± 2 °C), illumination (2000 lx), photoperiod of 12/12 (light/dark) and continuous aeration were controlled. It was shown that N. oculata can tolerate alkaline conditions of pH ≥ 10 and contributes to the reduction of soluble organic matter in OW. PWW and PM were found to be viable media for the survival of N. oculata. Finally, regarding the inoculum concentrations studied, the most appropriate were 10% for PWW and 70% for PM.

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New Angled Twin–layer Porous Substrate Photobioreactors for Cultivation of Nannochloropsis oculata

Cited by 2 publications

References 62 publications

Makeup Water Addition Can Affect the Growth of Scenedesmus dimorphus in Photobioreactors

Makeup Water Addition Can Affect the Growth of Scenedesmus dimorphus in Photobioreactors

Removal of organic matter during adaptation of Nannochloropsis oculata in livestock waste

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