Relevant bibliographies by topics / Porous substrate photobioreactor

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  2. Dissertations / Theses

Academic literature on the topic 'Porous substrate photobioreactor'

Author: Grafiati
Published: 25 May 2024

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Journal articles on the topic "Porous substrate photobioreactor"

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Li, Tong, Björn Podola, Larissa K. P. Schultze, and Michael Melkonian. "Design scenario analysis for porous substrate photobioreactor assemblies." Journal of Applied Phycology 31, no. 3 (December 5, 2018): 1623–36. http://dx.doi.org/10.1007/s10811-018-1700-2.

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Li, Tong, Björn Podola, and Michael Melkonian. "Investigating dynamic processes in a porous substrate biofilm photobioreactor — A modeling approach." Algal Research 13 (January 2016): 30–40. http://dx.doi.org/10.1016/j.algal.2015.11.006.

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Trí, Đỗ Thành, Lại Thị Lan Anh, Tôn Nữ Thùy An, Lê Thượng Chỉ, Bùi Thị Thu Hiền, and Trần Hoàng Dũng. "ẢNH HƯỞNG CỦA ÁNH SÁNG TỪ LIGHT EMITTING DIODE LÊN SINH TRƯỞNG VÀ TÍCH LŨY ASTAXANTHIN CỦA HAEMATOCOCCUS PLUVIALIS ĐƯỢC NUÔI TRONG TWIN-LAYER POROUS SUBSTRATE PHOTOBIOREACTOR PHƯƠNG NGHIÊNG." Tạp chí Khoa học 17, no. 9 (September 30, 2020): 1597. http://dx.doi.org/10.54607/hcmue.js.17.9.2734(2020).

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Vi tảo Haematococcus pluvialis hiện nay được nuôi để thu astaxanthin tự nhiên trong các hệ thống nuôi huyền phù hoặc cố định. Khi nuôi tảo theo kiểu quang tự dưỡng, hệ thống chiếu sáng ảnh hưởng rất lớn đến sự sinh trưởng và tích lũy astaxanthin trong tế bào. Trong nghiên cứu này, hệ thống twin-layer porous substrate photobioreactor được sử dụng để nuôi cố định H. pluvialis với chiếu sáng bằng Light Emitting Diode (LED) đơn sắc màu đỏ hoặc lam hoặc kết hợp đỏ và lam đồng thời. Các chu kì sáng/tối khác nhau của LED đỏ và lam được áp dụng và lựa chọn dựa trên tiêu chí sinh trưởng và tích lũy astaxanthin của vi tảo. Sự kết hợp ánh sáng LED đỏ và lam ở cường độ sáng 300-400 µmol photon.m-2.s-1 cho kết quả tăng sinh khối khô và tích lũy astaxanthin cao nhất, với chế độ chiếu sáng 24 giờ sáng:0 giờ tối cho kết quả sinh khối khô vi tảo đạt 111,6 g.m-2 và tích lũy astaxanthin 1,3% chỉ sau 10 ngày nuôi. Việc sử dụng ánh sáng đơn sắc từ LED cho thấy hiệu quả về năng lượng và có khả năng ứng dụng cho việc nuôi cấy tảo cố định trong các hệ thống twin-layer porous substrate photobioreactor quy mô lớn hơn.
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Carbone, Dora Allegra, Giuseppe Olivieri, Antonino Pollio, and Michael Melkonian. "Biomass and phycobiliprotein production of Galdieria sulphuraria, immobilized on a twin-layer porous substrate photobioreactor." Applied Microbiology and Biotechnology 104, no. 7 (February 14, 2020): 3109–19. http://dx.doi.org/10.1007/s00253-020-10383-8.

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Shaikh, Sultan, Naim Rashid, Gordon McKay, and Hamish Robert Mackey. "Photobioreactor Design for Polyhydroxyalkanoate Production Using Anoxygenic Photoheterotrophs: A Review." Fermentation 9, no. 8 (August 21, 2023): 778. http://dx.doi.org/10.3390/fermentation9080778.

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This review paper provides an overview of various types of photobioreactors (PBRs) that could be used for the production of polyhydroxyalkanoates (PHAs) using anoxygenic photoheterotrophs, with a focus on the design and operation of these systems. The paper highlights the potential of different PBRs based on reactor geometry and growth mode, and also examines the advantages and disadvantages of each PBR type and summarizes their suitability for PNSB-PHA production. The optimization of reactor design and operation is crucial for maximizing PNSB growth and PHA productivity. The self-immobilization of bacteria in granular sludge is a promising technology for wastewater treatment and the production of PHAs, while grooved-surface PBRs and porous-substrate PBRs have limitations due to difficult biomass harvesting in the former and the presence of aerobic conditions incongruent with PNSB culturing in the latter. Limitations exist with all solutions for maximizing rapid growth and maintaining high biomass concentrations due to the requirements of phototrophic growth.
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Do, Thanh-Tri, Binh-Nguyen Ong, Tuan-Loc Le, Thanh-Cong Nguyen, Bich-Huy Tran-Thi, Bui Thi Thu Hien, Michael Melkonian, and Hoang-Dung Tran. "Growth of Haematococcus pluvialis on a Small-Scale Angled Porous Substrate Photobioreactor for Green Stage Biomass." Applied Sciences 11, no. 4 (February 18, 2021): 1788. http://dx.doi.org/10.3390/app11041788.

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In the production of astaxanthin from Haematococcus pluvialis, the process of growing algal biomass in the vegetative green stage is an indispensable step in both suspended and immobilized cultivations. The green algal biomass is usually cultured in a suspension under a low light intensity. However, for astaxanthin accumulation, the microalgae need to be centrifuged and transferred to a new medium or culture system, a significant difficulty when upscaling astaxanthin production. In this research, a small-scale angled twin-layer porous substrate photobioreactor (TL-PSBR) was used to cultivate green stage biomass of H. pluvialis. Under low light intensities of 20–80 µmol photons m−2·s−1, algae in the biofilm consisted exclusively of non-motile vegetative cells (green palmella cells) after ten days of culturing. The optimal initial biomass density was 6.5 g·m−2, and the dry biomass productivity at a light intensity of 80 µmol photons m−2·s−1 was 6.5 g·m−2·d−1. The green stage biomass of H. pluvialis created in this small-scale angled TL-PSBR can be easily harvested and directly used as the source of material for the inoculation of a pilot-scale TL-PSBR for the production of astaxanthin.
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Do, Thanh-Tri, Binh-Nguyen Ong, Minh-Ly Nguyen Tran, Doan Nguyen, Michael Melkonian, and Hoang-Dung Tran. "Biomass and Astaxanthin Productivities of Haematococcus pluvialis in an Angled Twin-Layer Porous Substrate Photobioreactor: Effect of Inoculum Density and Storage Time." Biology 8, no. 3 (September 18, 2019): 68. http://dx.doi.org/10.3390/biology8030068.

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The microalga Haematococcus pluvialis is mainly cultivated in suspended systems for astaxanthin production. Immobilized cultivation on a Twin-Layer porous substrate photobioreactor (TL-PSBR) has recently shown promise as an alternative approach. In Vietnam, a TL-PSBR was constructed as a low-angle (15 °) horizontal system to study the cultivation of H. pluvialis for astaxanthin production. In this study, the biomass and astaxanthin productivities and astaxanthin content in the dry biomass were determined using different initial biomass (inoculum) densities (from 2.5 to 10 g dry weight m−2), different storage times of the initial biomass at 4 °C (24, 72, 120 and 168 h) and different light intensities (300–1000 µmol photons m−2 s−1). The optimal initial biomass density at light intensities between 400–600 µmol photons−2 s−1 was 5–7.5 g m−2. Algae stored for 24 h after harvest from suspension for immobilization on the TL-PSBR yielded the highest biomass and astaxanthin productivities, 8.7 g m−2 d−1 and 170 mg m−2 d−1, respectively; longer storage periods decreased productivity. Biomass and astaxanthin productivities were largely independent of light intensity between 300–1000 µmol photons m−2 s−1 but the efficiency of light use per mole photons was highest between 300–500 µmol photons m−2 s−1. The astaxanthin content in the dry biomass varied between 2–3% (w/w). Efficient supply of CO2 to the culture medium remains a task for future improvements of angled TL-PSBRs.
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Do, Thanh-Tri, Bich-Huy Tran-Thi, Binh-Nguyen Ong, Tuan-Loc Le, Thanh-Cong Nguyen, Quoc-Dang Quan, Thuong-Chi Le, Dai-Long Tran, Michael Melkonian, and Hoang-Dung Tran. "Effects of red and blue light emitting diodes on biomass and astaxanthin of Haematococcus pluvialis in pilot scaleangled twin-layer porous substrate photobioreactors." Ministry of Science and Technology, Vietnam 63, no. 2 (June 1, 2021): 81–88. http://dx.doi.org/10.31276/vjste.63(2).81-88.

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The production of natural astaxanthin is usually accomplished by suspended cultivation of the microalgae Haematococcus pluvialis. In this study, for the purpose of cost reduction, H. pluvialis is grown in pilot scale angled twin-layer porous substrate photobioreactors with light energy from red/blue LEDs that can produce red light, blue light, or a combination of blue-red light. The total dry biomass of the microalgae reached a maximum of 40.74 g.m-2under blue-red LEDs. The early initiation of blue-red LED illumination (on day 2) after algae immobilization in the biofilm resulted in the highest accumulation of astaxanthin in the dry biomass, which reached a maximum of 1.3% (w/w) after 10 d of culture.
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Do, Thanh-Tri, Toan-Em Quach-Van, Thanh-Cong Nguyen, Pau Loke Show, Tran Minh-Ly Nguyen, Duc-Hoan Huynh, Dai-Long Tran, Michael Melkonian, and Hoang-Dung Tran. "Effect of LED Illumination Cycle and Carbon Sources on Biofilms of Haematococcus pluvialis in Pilot-Scale Angled Twin-Layer Porous Substrate Photobioreactors." Bioengineering 10, no. 5 (May 16, 2023): 596. http://dx.doi.org/10.3390/bioengineering10050596.

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Light-emitting diodes are increasingly used as artificial light sources in Haematococcus pluvialis cultivation due to the fact of their energy advantages. The immobilized cultivation of H. pluvialis in pilot-scale angled twin-layer porous substrate photobioreactors (TL-PSBRs) was initially performed with a 14/10 h light/dark cycle and showed relatively low biomass growth and astaxanthin accumulation. In this study, the illumination time with red and blue LEDs at a light intensity of 120 µmol photons m−2 s−1 was increased to 16–24 h per day. With a light/dark cycle of 22/2 h, the biomass productivity of the algae was 7.5 g m−2 day−1, 2.4 times higher than in the 14/10 h cycle. The percentage of astaxanthin in the dry biomass was 2%, and the total amount of astaxanthin was 1.7 g m−2. Along with the increase in light duration, adding 10 or 20 mM NaHCO3 to the BG11-H culture medium over ten days of cultivation in angled TL-PSBRs did not increase the total amount of astaxanthin compared with only CO2 addition at a flow rate of 3.6 mg min−1 to the culture medium. Adding NaHCO3 with a 30–80 mM concentration inhibited algal growth and astaxanthin accumulation. However, adding 10–40 mM NaHCO3 caused algal cells to accumulate astaxanthin at a high percentage in dry weight after the first four days in TL-PSBRs.
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Bảo, Nguyễn Hồng Ngọc, Đỗ Thành Trí, Nguyễn Thành Công, Ong Bỉnh Khiêm, and Trần Hoàng Dũng. "HAEMATOCOCCUS PLUVIALIS TRONG HỆ THỐNG TWIN–LAYER POROUS SUBSTRATE PHOTOBIOREACTOR PHƯƠNG NGHIÊNG: ẢNH HƯỞNG CỦA CÁC NGUỒN CARBON KHÁC NHAU ĐẾN SỰ SINH TRƯỞNG VÀ TÍCH LUỸ ASTAXANTHIN." Tạp chí Khoa học 19, no. 11 (November 30, 2022). http://dx.doi.org/10.54607/hcmue.js.19.11.3488(2022).

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Vi tảo được biết đến là một nguồn quan trọng sản xuất các hợp chất hữu cơ, ứng dụng vào nhiều lĩnh vực khác nhau. Việc nuôi cấy vi tảo chủ yếu sử dụng mô hình nuôi huyền phù, tiêu thụ nhiều nước và năng lượng, việc thu hoạch đòi hỏi nhiều chi phí và công lao động. Mô hình nuôi cấy tảo trên hệ thống Twin–layer photobioreactor có thể khắc phục những nhược điểm trên. Trong nghiên cứu này, hệ thống TL-PSBR nghiêng được sử dụng để nuôi cấy vi tảo Haematococcus pluvialis và thử nghiệm bổ sung nguồn carbon từ muối NaHCO3 hoặc muối CH3COONa ở các nồng độ khác nhau. Kết quả thử nghiệm cho thấy muối CH3COONa nồng độ 35 mM bổ sung vào môi trường nuôi cấy vi tảo H. pluvialis cho hiệu quả cao. Lượng sinh khối khô thu được trên hệ thống đạt 94,78 g m-2, lượng astaxanthin tích lũy đạt 1275,03 mg m-2 chỉ sau 10 ngày nuôi. Các kết quả này cao hơn rất nhiều so với khi chỉ sử dụng khí CO2 (SKK tăng 1,91 lần; lượng astaxanthin gấp 3,32 lần, tỉ lệ astaxanthin tích lũy trong sinh khối hơn 1,75 lần). Kết quả đưa đến khả năng sử dụng CH3COONa vào nuôi cấy vi tảo trên hệ thống TL-PSBR nghiêng, sản xuất astaxanthin.
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Dissertations / Theses on the topic "Porous substrate photobioreactor"

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Arnaldo, Mary. "Eco-physiological study of the marine benthic diatom Amphora sp. : optimization of culture conditions for health, cosmetic and food applications." Electronic Thesis or Diss., Nantes Université, 2023. http://www.theses.fr/2023NANU4037.

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Les diatomées benthiques marines ont la capacité de produire une biomasse de qualité et des composés bioactifs pour diverses applications commerciales. Amphora sp. NCC169 est l'une de ces espèces qui produisent des lipides de grande valeur. Cependant, la production de masse d Amphora sp. NCC169 dans un photobioréacteur traditionnel à suspension est rendue difficile par sa sensibilité à l'agitation et aux turbulences. Des cultures d’ Amphora sp NCC169 ont été mise en place au sein d’un phtobioréac teur de substrat poreux (PSBR) à orientation verticale afin de produire de la biomasse et des lipides. Les résultats ont été comparés à ceux obtenus par une technique plus classique de culture en batch dans des fioles de type Fernbach. Il apparaît une productivité de croissance (P biomasse = 0.5 ± 0.03 g·m 2 ·j 1 ) et une production de lipide (P lipide = 0.10 ± 0.02 g· m 2 ·j 1 ) plus importante en PSBR. L'étude a également démontré l'impact positif d'une combinaison de longueurs d'onde de lumière rouge (620 780 nm) et bleue (440 490 nm) sur le taux de production de lipides d' Amphora sp. NCC169 en utilisant le PSBR (23,8 ± 2,3 %). Cette recherche met en exergue le succès des cultures en biofilm, et souligne l’importance de respecter la physiologie des Diatomées benthiques afin de générer de la biomasse et des lipides d’intérêt
Marine benthic diatoms have the capacity to produce quality biomass and bioactive compounds for various commercial applications. Amphora sp. NCC169 is one of such species that have high-value lipid production. However, mass-production of Amphora sp. NCC169 in traditional suspension photobioreactor is challenged by its sensitivity to stirring and turbulence. Cultures of Amphora sp. NCC169 were set up in a vertically oriented porous substrate photobioreactor (PSBR) to produce biomass and lipids. Results were compared with those obtained using a more conventional batch culture technique in Fernbach-type flasks. Growth productivity (Pbiomass = 0.5 ± 0.03 g·m-2·day-1) and lipid production (Plipid = 0.1 ± 0.02 g·m-2·day-1) were higher in PSBR. The study also demonstrated the positive impact of a combination of red (620 - 780 nm) and blue (440 - 490 nm) light wavelengths on the lipid production rate of Amphora sp. NCC169 using PSBR (23.8 ± 2.3%). This research highlights the success of biofilm cultures and underlines the importance of respecting the physiology of benthic diatoms in order to generate biomass and lipids of interest
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