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Effect of Flating Photobioreactor Light-path on the Growth and Organic Matter Accumulation of Isochrysis galbana Parke
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作者 吴电云 邹宁 +1 位作者 高维锡 黄清荣 《Agricultural Science & Technology》 CAS 2010年第11期7-9,共3页
[Objective] The paper aims to provide references to cultivate I.galbana in a large scale and explore its medical value.[Method] I.galbana had been cultivated in different light-path flat plate bioreactors,and the grow... [Objective] The paper aims to provide references to cultivate I.galbana in a large scale and explore its medical value.[Method] I.galbana had been cultivated in different light-path flat plate bioreactors,and the growth condition and content of organic matter within cells of I.galbana had been analyzed.[Result] Growth rate and volumetric productivity of I.galbana cells increased as light-path of flat plate bioreactors decreased,however,daily areal output rate rose with the increasing of light path.The smaller the light path of flat plate bioreactors was,the more content of total lipids,protein and polysaccharide it had in I.galbana cells.[Conclusion] It is an effective way to improve production efficiently and reduce the cost by selecting the suitable bioreactors. 展开更多
关键词 Isochrysis galbana parke Light-path photobioreactor PRODUCTIVITY Organic matter
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Design of Photobioreactors for Mass Cultivation of Photosynthetic Organisms 被引量:16
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作者 Qingshan Huang Fuhua Jiang +1 位作者 Lianzhou Wang Chao Yang 《Engineering》 SCIE EI 2017年第3期318-329,共12页
Photosynthetic microorganisms are important bioresources for producing desirable and environmentally benign products, and photobioreactors (PBRs) play important roles in these processes. Designing PBRs for photocata... Photosynthetic microorganisms are important bioresources for producing desirable and environmentally benign products, and photobioreactors (PBRs) play important roles in these processes. Designing PBRs for photocatalysis is still challenging at present, and most reactors are designed and scaled up using semi- empirical approaches. No appropriate types of PBRs are available for mass cultivation due to the reactors' high capital and operating costs and short lifespan, which are mainly due to a current lack of deep understanding of the coupling of light, hydrodynamics, mass transfer, and cell growth in efficient reactor design. This review provides a critical overview of the key parameters that influence the performance of the PBRs, including light, mixing, mass transfer, temperature, pH, and capital and operating costs. The lifespan and the costs of cleaning and temperature control are also emphasized for commercial exploitation. Four types of PBRs-tubular, plastic bag, column airlift, and flat-panel airlift reactors are recommended for large- scale operations. In addition, this paper elaborates the modeling of PBRs using the tools of computational fluid dynamics for rational design. It also analyzes the difficulties in the numerical simulation, and presents the prospect for mechanism-based models. 展开更多
关键词 photobioreactor Solar energy PHOTOSYNTHESIS HYDRODYNAMICS Flashing-light effect
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A system combining microbial fuel cell with photobioreactor for continuous domestic wastewater treatment and bioelectricity generation 被引量:9
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作者 蒋海明 罗生军 +2 位作者 师晓爽 戴萌 郭荣波 《Journal of Central South University》 SCIE EI CAS 2013年第2期488-494,共7页
A coupled system consisting of an upflow membrane-less microbial fuel cell (upflow ML-MFC) and a photobioreactor was developed, and its effectiveness for continuous wastewater treatment and electricity production was ... A coupled system consisting of an upflow membrane-less microbial fuel cell (upflow ML-MFC) and a photobioreactor was developed, and its effectiveness for continuous wastewater treatment and electricity production was evaluated. Wastewater was fed to the upflow ML-MFC to remove chemical oxygen demand (COD), phosphorus and nitrogen with simultaneous electricity generation. The effluent from the cathode compartment of the upflow ML-MFC was then continuously fed to an external photobioreactor for removing the remaining phosphorus and nitrogen using microalgae. Alone, the upflow ML-MFC produces a maximum power density of 481 mW/m 3 , and obtains 77.9% COD, 23.5% total phosphorus (TP) and 97.6% NH4+-N removals. When combined with the photobioreactor, the system achieves 99.3% TP and 99.0% NH4+-N total removal. These results show both the effectiveness and the potential application of the coupled system to continuously treat domestic wastewater and simultaneously generate electricity and biomass. 展开更多
关键词 wastewater treatment microbial fuel cell photobioreactor MICROALGAE BIOELECTRICITY
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Design of a Novel Photobioreactor for Culture of Microalgae 被引量:1
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作者 Xia Jin-lan J M Levert +2 位作者 F Benjelloun P Glavie P Lhoir 《Wuhan University Journal of Natural Sciences》 CAS 2002年第4期486-492,共7页
This paper presents the design of a novel photobioreactor for cultivation of microalgae. The body of the reactor with volume of about 40 L is parallelipipedic and divided in five compartments that can be put in series... This paper presents the design of a novel photobioreactor for cultivation of microalgae. The body of the reactor with volume of about 40 L is parallelipipedic and divided in five compartments that can be put in series. The optical guides, plunged perpendicularly into the compartments, are upright Plexiglas plates on which side faces there are able to diffuse light laterally and ensure an even distribution of light in the medium. External airlifts through the side columns are used for mixing of culture medium. The external light source is a SON-T lamp mounted inside a projector that provides a conical light dispersion, it is interchangeable and may take different positions. The design offers the photobioreactor characteristics including mainly interchangeable light source, homogenous distribution of light, perfect mixing of suspension of algae, high ratio of illuminating surface to volume of reactor, compactness and absence of contamination. Schemes, view of the photobioractor and data of continuous culture forSpirulina maxima are presented. 展开更多
关键词 DESIGN photobioreactor MICROALGAE Plexiglas optic unit Spirulina maxima
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H_2 PRODUCTION BY ANABAENA VARIABILIS MUTANT IN COMPUTER CONTROLLED TWO-STAGE AIR-LIFT TUBULAR PHOTOBIOREACTOR
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作者 刘建国 D.O.Hall +2 位作者 K.K.Rao A.A.Tsygankov D.A.Sveshnikov 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2000年第2期126-131,共6页
A 4.34 liter two stage air lift photobioreactor incorporating Anabaena variabilis ATCC29413 mutant PK84 was used to study H 2 production. Results showed that H 2 production increased with increasing light intensity fr... A 4.34 liter two stage air lift photobioreactor incorporating Anabaena variabilis ATCC29413 mutant PK84 was used to study H 2 production. Results showed that H 2 production increased with increasing light intensity from 47 μE/(m 2·s) up to 190 μE/(m 2·s), but that further increase of light intensity decreased the H 2 production because of the inhibition due to the high pO 2. The data also indicated that longer argon gas charge resulted in more H 2 produced due to the increase of nitrogenase activities and heterocyst frequency, and that more than 1.3 L net H 2 was produced from this computer controlled photobioreactor. 展开更多
关键词 H 2 PRODUCTION ANABAENA variabilis photobioreactor light intensity
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Split internal-loop photobioreactor for Scenedesmus sp.microalgae:Culturing and hydrodynamics
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作者 Laith S.Sabri Abbas J.Sultan Muthanna H.Al-Dahhan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第5期236-248,共13页
In this study,the evaluation of the performance of the split internal loop photobioreactor for culturing a species of green microalgae,Scenedesmus sp.under different operating superficial gas velocity and during a dif... In this study,the evaluation of the performance of the split internal loop photobioreactor for culturing a species of green microalgae,Scenedesmus sp.under different operating superficial gas velocity and during a different time of growth(i.e.,starting for the first day until end day of the culturing process)was addressed.The evaluation of the performance of the split internal loop photobioreactor was included assessing the density,pH,temperature,viscosity,surface tension,the optical density,cell population,dry biomass,and chlorophyll of the culture medium of the microalgae culturing.Additionally,the hydrodynamics of a Split Internal-Loop Photobioreactor with microalgae culturing was comprehensively quantified.Radioactive particle tracking(RPT)and gamma-ray computed tomography(CT)techniques were applied for the first time to quantify and address the influence of microalgae culture on the hydrodynamic parameters.The hydrodynamics parameters such as local liquid velocity field,shear stresses,turbulent kinetic energy,and local gas holdup profiles were measured at different superficial gas velocities as well as under different times of algae growth.The obtained results indicate that the flow distribution may significantly affect the performance of the photobioreactor,which may have substantial effects on the cultivation process.The obtained experimental data can serve as benchmark data for the evaluation and validation of computational fluid dynamics(CFD)codes and their closures.This,in turn,allows us to develop efficient reactors and consequently improving the productivity and selectivity of these photobioreactors. 展开更多
关键词 SCENEDESMUS MICROALGAE Cylindrical AIRLIFT photobioreactor Physical properties Non-invasive GAMMA-RAY technique
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HYDROGEN PHOTOPRODUCTION OF A.VARIABILIS INCORPORATED IN A PHOTOBIOREACTOR
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作者 刘建国 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 1998年第S1期118-126,共9页
H2 photoproduction and nitrogenase activities in two strains of Anabaena variabilismarked wild type ATCC 29413 and mutant PK84 exposed to thermal stress (temperature higher than thenormal incubation temperature of 30... H2 photoproduction and nitrogenase activities in two strains of Anabaena variabilismarked wild type ATCC 29413 and mutant PK84 exposed to thermal stress (temperature higher than thenormal incubation temperature of 30℃) were studied. Cultures of both strains collected from any intervalof logarithmic growth phase exhibited high H2 photoproduction and nitrogenase activities when exposed tolimited time heat shock during the assay process. In contrast, the algal H2 photoproduction rate of bothstrains fluctuated with long term thermal stress caused hy increasing the growth temperature from 30℃ to36℃.The changes of nitrogenase (the key H2 photobiosynhetic enzyme) activities in the mutant PK84showed variation tendency similar to that of H2 photoproduction during exposure to thermal stress, indicat-ing that fluctuation of H2 photopnduction in the mutant was mainly due to the variation of nitrogenase ac-tivities. A temporary maximal H2 photoproduction in the mutant PK84 (wild type ATCC29413 ) was ob-served when cells po at 36℃ for 14 (6) days. However, the responses of nitrogenase activities in thewild type to thermal stress were not completely similar to those in the mutant in spite of similar variationsof H2 photoproduction in both strains. The data obtained in these studies suggested tha the activities ofother enzymes (in the wild strain) involved in H2 photoproduction were affected by thermal stress since H2photoporduction maximized or dropped to 0 without variation tendency similar to that of nitrogenase activi-ties.Furthermore, an enhancement of H2 photoproduction speed of the mutant strain cultured in a 4.4 Llaboratory photobioreactor was also observed when it was subjected to short time continuous charge of ar-gon, and temperature rise.All these results indicated that high temperature plays an important role in the photo-autotrophic H2photoproduction, and that long term thermal stress is unfavourable for net H2 phooproduction in bothstrains of A. variabilis though short-time heat shock is conducive to H2 photoproduction. 展开更多
关键词 H_2 photoproduction Anabaena variabilis thermal stress MUTANT photobioreactor
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Application of photobioreactors to cultivation of microalgae
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作者 陈雷 王光玉 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2003年第2期221-224,共4页
An overview of photobioreactors now in use for production of microalgae world wide is presented, and the application of photobioreactors to the cultivation of microalgae is discussed in detail. It is pointed out that ... An overview of photobioreactors now in use for production of microalgae world wide is presented, and the application of photobioreactors to the cultivation of microalgae is discussed in detail. It is pointed out that high cell density and industrial production of microalgae can be achieved using many kinds of closed photobioreactors including fermentor, tubular and flat plate photobioreactors, and the cultivation of Spirulina, Chlorella, Dunaliella tertiolecta and Porphyridium cruentrim by photobioreactors can achieve higher and steadier productivity than the cultivation of microalgae by an open air system. More and more researches indicate that tubular and flat plate photobioreactors are the development trend for photobioreactors with bubbles and air lift stirrers, and high bright light emitting diodes are the most economic light source with great potential for future development of photobioreactors. Photobioreactors can also be used for the production of high value metabolite (EPA or DHA) using some microalgae species for energy development and environment protection. 展开更多
关键词 MICROALGAE photobioreactor CULTURE
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Mixotrophic Cultivation of Tetraselmis sp.-1 in Airlift Photobioreactor
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作者 沈继红 Yu +6 位作者 Junhong Lin Xuezheng Li Guangyou Liu Fayi 《High Technology Letters》 EI CAS 2003年第3期42-48,共7页
Tetraselmis sp.-1 is a new microalgae strain constructed by cell fusion technique. In this paper, the mixotrophic cultivation of Tetraselmis sp.-1 in airlift photobioreactor is investigated. Firstly, the paper calcula... Tetraselmis sp.-1 is a new microalgae strain constructed by cell fusion technique. In this paper, the mixotrophic cultivation of Tetraselmis sp.-1 in airlift photobioreactor is investigated. Firstly, the paper calculates the light attenuation in the mixotrophic medium, and sets the light attenuation model. Secondly, it uses the same dissolved oxygen coefficient (K d) of flask culture to select the aeration of bioreactor. Finally, it sets the growth kinetic model, production (chlorophyll-a and total lipid) kinetic models and substrate (glucose) consumption kinetic model of Tetraselmis sp.-1 in airlift photobioreactor. 展开更多
关键词 Tetraselmis sp.-1 airlift photobioreactor mixotrophic cultivation
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Photobioreactor of Microalgas for CO_(2) Biofixation
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作者 Yordanka Reyes Cruz Gisel Chenard Díaz +5 位作者 Andreina Z. Figuera Leonett René Gonzalez Carliz Vinicius Rossa Luciano Basto Oliveira Maurílio Novais da Paixao Donato Alexandre Gomes Aranda 《Journal of Power and Energy Engineering》 2019年第1期91-106,共16页
Microalgae are unicellular organisms capable of photosynthesis, turning sunlight and carbon dioxide (CO2) into rich biomass. Precisely because of this definition, in recent years various sectors have been targeting th... Microalgae are unicellular organisms capable of photosynthesis, turning sunlight and carbon dioxide (CO2) into rich biomass. Precisely because of this definition, in recent years various sectors have been targeting their ability to reduce CO2 emissions and the capacity of simultaneously synthesize biomass which can be later used to produce bio-fuels. Besides being considered fast-growth microorganisms, microalgae have a diverse biochemical composition with similar characteristics to traditional biomass. In this context, the present work aimed to evaluate the biofixation of CO2 by the microalgae Monoraphidium sp., cultivated in a closed-window type photobioreactor, as well as characterization of microalgal biomass produced in relation to the total lipid content (TL), lipids converted into biodiesel (LCB), carbohydrates and proteins. The results achieved showed that the best result was obtained after 24 h of cultivation, where for each gram of biomass produced approximately 1.2 g of CO2 were consumed. In the growth phase the average biomass productivity in the Janela photobioreactor was 58 mg&middot;L-1&middot;day-1 concluding that microalgae culture systems could be coupled to the chimneys of large industries emitters CO2 using this gas, resulting from combustion processes, in the process of photosynthesis. The biomass Monoraphidium sp. produced had a content of lipids converted into biodiesel of approximately 8.36% ± 2.69%, carbohydrates 32% ± 3.37% and proteins 34.26% ± 0.41%. 展开更多
关键词 BIOMASS CO_(2) Capture CULTIVATION MICROALGAE photobioreactor
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Biosynthesis of ^(13)C-Labeled Amino Acids and Sugars by Spirulina (Arthrospira) Maxima in a Parallelepiped Photobioreactor
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作者 夏金兰 聂珍媛 J.M.Levert 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2002年第5期102-106,共5页
This paper presents the investigation on biosynthesis of high-value-added amino acids and sugars labeled uniformly with stable isotope 13C by microalga Spirulina (Arthrospira) maxima in a parallelepiped photobioreacto... This paper presents the investigation on biosynthesis of high-value-added amino acids and sugars labeled uniformly with stable isotope 13C by microalga Spirulina (Arthrospira) maxima in a parallelepiped photobioreactor. The kinetic data of both batch and continuous cultures with characterization of the amino acids and sugars are shown. The continuous culture without nutrients deficiency is for biosynthesis of amino acids, with tyrosine as one of the principal constituents, and the batch culture with deficiency in nitrogen is for biosynthesis of labeled glucose that is up to 64% versus dry mass of cells. 展开更多
关键词 amino acid MICROALGA parallelepiped photobioreactor SPIRULINA (Arthrospira) MAXIMA 13C-labeled sugar
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High Density Culture of Porphyridium cruentum in a 42 L Internal Airlift Loop Photobioreactor
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作者 王长海 王逸云 田志立 《过程工程学报》 CAS CSCD 北大核心 2003年第6期564-569,共6页
The key limiting factors to high-density culture of Porphyridium cruentum are the uptake of light energy and nutrient by the microalgal cells. Under the optimal conditions of carrier culture, both cell mass and cell d... The key limiting factors to high-density culture of Porphyridium cruentum are the uptake of light energy and nutrient by the microalgal cells. Under the optimal conditions of carrier culture, both cell mass and cell density were increased significantly up to 5.2 g/L (DW) and 5.2107/ml. Furthermore, the effects of the liquid circulation velocity, light intensity and initial cell density on cell mass productivity of P. cruentum were investigated in a 42 L internal loop airlift photobioreactor. Although the light intensity was as low as 100 mmol/(m2s), the light damage or the photoinhibition phenomenon was observed under the culture condition of low initial cell mass (0.10 g/L, DW) and high liquid circulation velocity (0.30 m/s). However, a higher cell growth rate and a high cell mass productivity were achieved with the same conditions only at high initial cell mass (about 0.80 g/L, DW). Under the optimal conditions, the cell specific growth rate, cell mass volumetric and areal output rate reached to 0.95 d-1, 0.80 g/(Ld) and 42.5 g/(m2d) respectively. Finally, a method of nutrient feeding and gradual increase of light intensity in different cultural stages was developed, which further improved the cell mass, cell mass volumetric and areal output rate to 5.9 g/L, 1.2 g/(Ld) and 61.7 g/(m2d) respectively. 展开更多
关键词 生物反应器 紫球藻 高密度培养 光能
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Microalgae cultivation in photobioreactors:sustainable solutions for a greener future
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作者 Shaikh Abdur Razzak Khairul Bahar +4 位作者 K.M.Oajedul Islam Abdul Khaleel Haniffa Mohammed Omar Faruque S.M.Zakir Hossain Mohammad M.Hossain 《Green Chemical Engineering》 EI CSCD 2024年第4期418-439,共22页
Microalgae cultivation in photobioreactors(PBRs)has emerged as a promising and sustainable approach to address various environmental and energy challenges,offering a multitude of benefits across diverse applications.R... Microalgae cultivation in photobioreactors(PBRs)has emerged as a promising and sustainable approach to address various environmental and energy challenges,offering a multitude of benefits across diverse applications.Recent developments in microalgae cultivation in photobioreactors have contributed substantially to the development and optimization of sustainable bioprocesses.This review presents a comprehensive analysis of recent innovations and breakthroughs in the field of microalgae cultivation,with a specific focus on their application in photobioreactors,aimed at paving the way for a greener future.This study in-depth examines the advantages of microalgae cultivation in photobioreactors,concentrating on its effectiveness in wastewater treatment,CO_(2)bioremediation,and the production of biofuels and high-value products.The review evaluates the effects of light,solar irradiation,temperature,nitrogen and phosphorus concentrations in culture media,CO_(2)concentrations,and pH on microalgae growth performance,including specific growth and biomass productivity.The study also examines open systems like unstirred ponds,raceway ponds,and circular ponds and closed systems like horizontal tubular,vertical bubble-column,airlift,flat panel,and plastic-bag photobioreactors,comparing their pros and cons.To optimize microalgae cultivation,key factors in photobioreactor design,including photosynthetic efficiencies,light/dark(L/D)cycles,CO_(2)concentrations,mass transfer,hydrodynamics behavior,and p H,are extensively investigated.In addition,the review outlines recent developments in large-scale photobioreactors and highlights the challenges and opportunities associated with photobioreactor scale-up and design parameter optimization,including genetic engineering and economic feasibility.This article is a vital resource for researchers,engineers,and industry professionals seeking sustainable bioprocesses and the application of microalgae-based technologies. 展开更多
关键词 Microalgae biomass CO_(2)biofixation Wastewater treatment BIOFUEL photobioreactorS
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Photofermentative hydrogen production by immobilized Rhodopseudomonas sp. S16-VOGS3 cells in photobioreactors
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作者 Isabela C.Moia Aikaterini Kanaropoulou +2 位作者 Demetrios F.Ghanotakis Pietro Carlozzi Eleftherios Touloupakis 《Energy Reviews》 2024年第1期39-48,共10页
One of the most important solutions to overcome energy and environmental problems and to replace the fossil fuel-based economy could be the use of photosynthetic microorganisms.The use of photosynthetic microorganisms... One of the most important solutions to overcome energy and environmental problems and to replace the fossil fuel-based economy could be the use of photosynthetic microorganisms.The use of photosynthetic microorganisms is a potential alternative to energy generation from fossil fuels because they efficiently produce hydrogen(H_(2)).Immobilization of photosynthetic microorganisms is used for many biotechnological applications such as H_(2) production.This method appears attractive because it restricts cell movement in an entrapped matrix.Immobilization of Rhodopseudomonas sp.S16-VOGS3 cells is a promising way to improve H_(2) production.In this work,the ability of immobilized Rhodopseudomonas sp.S16-VOGS3 cells to produce H_(2) was investigated in two types of PBRs.The PBRs used in this work were a cylindrical one with 0.2 L working volume(C-PBR)and a flat Roux type with 0.6 L working volume(FRT-PBR).The calcium alginate beads prepared were resistant to culture mixing and showed little leakage of cells,and the immobilized cells continued the photofermentation process in both PBRs.The immobilized cells in the C-PBR produced 936.8 mL of H_(2) with an average H_(2) production rate of 2.99 mL/h.The average productivity was 126.4μL(H_(2))/mg(cells)/h or 14.96 mL(H_(2))/L(culture)/h,and the light conversion efficiency was 2.37%.The immobilized cells in the FRT-PBR produced a total of 662.2 mL of H_(2) with an average H_(2) production rate of 1.55 mL/h.The average productivity was 31.1μL(H_(2))/mg(cells)/h or 2.58 mL(H_(2))/L(culture)/h,and the light conversion efficiency was 0.52%.The more uniform and therefore more efficient degree of bacterial cell mixing achieved in the C-PBR with cylindrical configuration played an important role compared to the FRT-PBR.In the FRT-PBR,the beads were aggregated at the bottom,which limited light penetration and resulted in low H_(2) production efficiency. 展开更多
关键词 photobioreactor Rhodopseudomonas sp.S16-VOGS3 PHOTOFERMENTATION Hydrogen production Calcium alginate
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鲜食螺旋藻的营养价值和应用潜力
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作者 罗光宏 刘海燕 +3 位作者 杨生辉 孙中亮 王丽娟 孙利芹 《扬州大学学报(农业与生命科学版)》 CAS 北大核心 2024年第5期139-146,共8页
螺旋藻能利用光能,固定二氧化碳合成如蛋白质、多糖、不饱和脂肪酸等有机物,被誉为人类最理想的食物资源之一。传统的螺旋藻产品形式有藻粉及以其为原料制成的片剂和胶囊等,这类产品加工制备的工艺中包含螺杆泵上料挤压、高速雾化和高... 螺旋藻能利用光能,固定二氧化碳合成如蛋白质、多糖、不饱和脂肪酸等有机物,被誉为人类最理想的食物资源之一。传统的螺旋藻产品形式有藻粉及以其为原料制成的片剂和胶囊等,这类产品加工制备的工艺中包含螺杆泵上料挤压、高速雾化和高温脱水等环节,在此过程中会造成螺旋藻藻丝断裂、细胞破碎及营养物质损失。鲜食螺旋藻是在封闭式光生物反应器中培养,经采收、洗涤、过滤、杀菌而制成的可直接食用的螺旋藻,其口感清爽、无不良气味,正逐渐被人们所接受。首先分析鲜食螺旋藻较传统藻粉的营养优势,然后综述鲜食螺旋藻在现代食品加工中的应用,并对其生产系统的开发前景进行了展望,旨在为螺旋藻新产品研发及产业高质量发展提供借鉴。 展开更多
关键词 鲜食螺旋藻 光生物反应器 营养价值 食品加工
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基于内置光纤/导光管反应器的微藻固碳减排研究
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作者 夏奡 任柯欣 +4 位作者 张敬苗 黄云 朱贤青 朱恂 廖强 《煤炭科学技术》 EI CAS CSCD 北大核心 2024年第2期329-337,共9页
我国燃煤电厂每年排放CO_(2)超过57亿t,为保障双碳目标如期实现,必须大幅降低燃煤电厂的CO_(2)排放。微藻固碳通过高效的光合作用吸收CO_(2)转化为生物质,是极具潜力的燃煤电厂减碳技术,但目前微藻固碳性能严重受限于反应器内光传输。... 我国燃煤电厂每年排放CO_(2)超过57亿t,为保障双碳目标如期实现,必须大幅降低燃煤电厂的CO_(2)排放。微藻固碳通过高效的光合作用吸收CO_(2)转化为生物质,是极具潜力的燃煤电厂减碳技术,但目前微藻固碳性能严重受限于反应器内光传输。导光管可灵活调节反应器内光分布,而光纤可集中传输光线且光损耗低,因此提出光纤/导光管微藻光生物反应器,扩大藻液受光面积,增加藻细胞色素的光捕集,促进微藻光合固碳。利用光学仿真软件对光纤/导光管内传输的光线进行追踪,获得了光纤/导光管管壁的光强分布。在不同反应器、输入光能条件下进行微藻培养实验,获得了微藻生物量、固碳速率与叶绿素含量的变化趋势,分析了内置光纤/导光管对微藻固碳的影响规律。结果表明:平面末端的光纤射出光的光强在导光管侧30~140 mm内迅速下降,导光管发光范围集中。在导光管底部添加锥形反光件反射抵达管底的透射光、并设计阶梯型光纤使输入光由不同阶梯分级发出,可使微藻光生物反应器内光分布更加均匀,反应器内部远离光源区域的藻细胞可以有效接受光能进行光合固碳。当光能输入为3.3 W/L时,含两级阶梯结构光纤和锥形反光件的导光管管侧表面最低光强为47μmol/(m^(2)·s),平均光强达64μmol/(m^(2)·s),较无光纤仅顶部给光的导光管侧面平均光强提高了2.6倍。微藻在插入阶梯型光纤的光生物反应器(SF-PBR)培养7 d后生物量达到1.9 g/L,比在插入平面端光纤的光生物反应器(FF-PBR)中培养的生物量高46.2%,比仅顶部受光的光生物反应器(LG-PBR)中培养的生物量高111.1%。当提升光源输入至5.0 W/L,微藻培养7 d后的生物量高达2.8 g/L,培养期间保持高固碳速率(608.3 mg/(L·d)),比对照组LG-PBR的固碳速率提高1.9倍。 展开更多
关键词 固碳 微藻 光生物反应器 光纤导光 减排
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碳中和背景下微藻生物固碳技术探究 被引量:1
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作者 廖赞 张景辉 +1 位作者 张生银 刘斌 《工业微生物》 CAS 2024年第3期65-67,共3页
生物固碳技术是一种可持续发展的碳减排方法,可提升碳减排能力,实现碳达峰、碳中和的“双碳”目标。文章通过文献分析、对比分析法,分析了微藻生物藻种选育及其培养技术,探究了微藻生物收获方法与衍生应用。结果表明,通过“环境筛选+基... 生物固碳技术是一种可持续发展的碳减排方法,可提升碳减排能力,实现碳达峰、碳中和的“双碳”目标。文章通过文献分析、对比分析法,分析了微藻生物藻种选育及其培养技术,探究了微藻生物收获方法与衍生应用。结果表明,通过“环境筛选+基因工程”的方法,可以获取固碳能力更强、生存能力更优的微藻生物;同时,在光生物反应器条件下,合理控制光照、温度、pH值、CO_(2)浓度、气体传质、营养物质等各项指标,可有效提升微藻生物发育与繁殖能力,进一步提高微藻固碳效应。在推广应用微藻生物固碳技术时,需要考虑高效固碳微藻品种选育、微藻生长环境因子调控技术,以提升微藻生物固碳技术的综合效益。 展开更多
关键词 碳中和 微藻 生物固碳 光生物反应器
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Progress in microalgae cultivation photobioreactors and applications in wastewater treatment:A review 被引量:3
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作者 Han Ting Lu Haifeng +3 位作者 Ma Shanshan Yuanhui Zhang Liu Zhidan Duan Na 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2017年第1期1-29,共29页
Using microalgae to treat wastewater has received growing attention in the world because it is regarded as a novel means for wastewater treatment.It is commonly recognized that large-scale cultivation and commercial a... Using microalgae to treat wastewater has received growing attention in the world because it is regarded as a novel means for wastewater treatment.It is commonly recognized that large-scale cultivation and commercial application of microalgae are limited by the development of photobioreactor(PBR).Although there are a lot of PBRs for microalgae pure cultivation which used culture medium,specialized PBRs designed for wastewater treatment are rare.The composition of wastewater is quite complicated;this might cause a very different photosynthetic effect of microalgae compared to those grown in a pure cultivation medium.Therefore,PBRs for wastewater treatment need to be redesigned and improved based on the existing PBRs that are used for microalgae pure cultivation.In this review,different PBRs for microalgae cultivation and wastewater treatment are summarized.PBR configurations,PBR design parameters and types of wastewater are presented.In addition,the wastewater treatment efficiency and biomass productivity were also compared among each type of PBRs.Moreover,some other promising PBRs are introduced in this review,and a two-stage cultivation mode which combines both closed and open system is discussed as well.Ultimately,this article focuses on current problems and gives an outlook for this field,aiming at providing a primary reference for microalgae cultivation by using wastewater. 展开更多
关键词 microalgae cultivation wastewater treatment photobioreactor(PBR) REVIEW
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Improvement of microalgae lipid productivity and quality in an ion-exchange-membrane photobioreactor using real municipal wastewater 被引量:2
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作者 Chang Haixing Fu Qian +3 位作者 Huang Yun Xia Ao Liao Qiang Zhu Xun 《International Journal of Agricultural and Biological Engineering》 SCIE EI CAS 2017年第1期97-106,共10页
To improve the productivity and quality of microalgae-based biodiesel when using municipal wastewater(MW)as nutrients source,an ion-exchange-membrane photobioreactor(IEM-PBR)was used in this study to eliminate the neg... To improve the productivity and quality of microalgae-based biodiesel when using municipal wastewater(MW)as nutrients source,an ion-exchange-membrane photobioreactor(IEM-PBR)was used in this study to eliminate the negative effects of pollutants in MW on microalgae Chlorella vulgaris and Scenedesmus obliquus.In the IEM-PBR,the real MW and microalgae cultures were separated in two chambers by the ion-exchange-membranes(IEMs).Nutrients(N,P,etc.)in the MW permeated into microalgae cultures through the IEMs,while pollutants(suspended solids,competitors,etc.)in the MW could hardly permeate into microalgae cultures.As a result,the lipid productivity in the IEM-PBR was improved to 85.7 mg/(L·d)for C.vulgaris and 111.8 mg/(L·d)for S.obliquus,which was slightly higher than that in the traditional photobioreactor(T-PBR)with real MW after centrifugation(82.5 mg/(L·d)for C.vulgaris and 105.8 mg/(L·d)for S.obliquus),but much higher than that in the T-PBR with untreated MW and primary MW(with lipid productivity of 20-30 mg/(L·d)).Besides,the lipid quality obtained in the IEM-PBR had higher proportion of cetane number(ca.60%)and lower linolenic acid content(ca.8%),which showed a superior quality in the IEM-PBR to that in the T-PBR.It demonstrated that the IEM-PBR is an effective approach to improve the productivity and quality of microalgae biodiesel. 展开更多
关键词 MICROALGAE photobioreactor lipid productivity real municipal wastewater ion-exchange-membrane
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碳酸酐酶附着膜在微藻直接空气碳捕集中的应用与固碳性能的强化
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作者 王睿龙 李明佳 Sandra KENTISH 《西安交通大学学报》 EI CAS CSCD 北大核心 2024年第9期11-18,共8页
为了解决低浓度直接空气碳捕集条件下微藻光生物反应器内CO_(2)传质效率差、溶解度低的问题,采用实验的方法制备了碳酸酐酶(CA)附着的尼龙纤维膜,利用CA催化转化CO_(2)为碳酸氢根的性质,提出了一种可以改善微藻溶液中CO_(2)溶解度及转... 为了解决低浓度直接空气碳捕集条件下微藻光生物反应器内CO_(2)传质效率差、溶解度低的问题,采用实验的方法制备了碳酸酐酶(CA)附着的尼龙纤维膜,利用CA催化转化CO_(2)为碳酸氢根的性质,提出了一种可以改善微藻溶液中CO_(2)溶解度及转化率的新型光生物反应器,测试了该反应器放置CA附着尼龙纤维漂浮膜前后的微藻培养和固碳性能,并进一步探究了膜的开孔率及CA附着量对微藻固碳率的影响。实验结果表明:所制备的CA附着的尼龙纤维膜对CO_(2)转化速率提升了62.7%,通过耐久性测试,CA的活性在5个培养周期后仍保持良好,性能衰减仅为11.3%;与传统气石鼓气方式相比,提出的新型光生物反应器的微藻质量浓度提高了29.7%,固碳率提升了65%;随着膜开孔率的增加和透光率的增加,单位CA负载质量的固碳率提高,开孔面积占比24.75%的对照组的单位CA固碳率相比不开孔提高了13%。该研究为进一步提高微藻直接空气捕集的固碳率提供了一种新的方法。 展开更多
关键词 微藻光生物反应器 直接空气碳捕集 碳酸酐酶 尼龙纤维膜
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