Article
Environmental Sciences
Ge Yan, Liang Fu, Xin Lu, Yutong Xie, Jiayi Zhao, Jiaqing Tang, Dandan Zhou
Summary: This study found that Chlorella regularis exhibited high tolerance to high concentrations of boron (B), maintaining cell growth and producing a high biomass. The microalgae removed B by absorbing it and binding it to protein and carbon components in the cells, with a removal capability exceeding that of some special adsorbents. Furthermore, the mitogen-activated protein-kinase signaling pathway was involved in the B tolerance of microalgae, regulating B efflux, glycolysis, and lipid/starch accumulation.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Paul Chambonniere, Adriana Ramirez-Romero, Alexandra Dimitriades-Lemaire, Jean-Francois Sassi, Florian Delrue
Summary: This study monitored the physiological changes of Chlorella vulgaris NIES 227 during lipid accumulation under nutrient limitation and found that the growth capacity of the microalgae can be preserved during the exponential growth phase, but under nutrient limitation, protein content decreases while lipid content increases, and the photosynthetic activity decreases. These findings are important for optimizing industrial processes in microalgae biofuel production.
FERMENTATION-BASEL
(2022)
Article
Environmental Sciences
Yiwen Mou, Na Liu, Kunyang Su, Xue Li, Tianxiang Lu, Ze Yu, Mingming Song
Summary: Microalgal biodiesel production faces challenges of high cost and low yields. This study investigated the cultivation of Scenedesmus quadricauda FACHB-1297 fed on xylose under mixotrophic and heterotrophic conditions. The results showed that nitrogen starvation and phosphorus sufficiency led to the highest lipid content and production. Xylose utilization rate was higher in heterotrophic mode, while phosphorus uptake rate was higher in mixotrophic mode. Increasing phosphorus concentrations positively impacted microalgal lipid content under heterotrophic cultivation. This study suggests the importance of providing sufficient phosphorus for microalgal lipid production under xylose heterotrophic/mixotrophic condition.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Dig Vijay Singh, A. K. Upadhyay, R. Singh, D. P. Singh
Summary: This study investigated the growth, lipid accumulation, and defense responses of Chlorella vulgaris and Scenedesmus vacuolatus under different concentrations of wastewater. The results showed that Scenedesmus vacuolatus had the highest specific growth rate and lipid accumulation at 50% concentration of wastewater. Additionally, Scenedesmus vacuolatus exhibited better tolerance against different concentrations of wastewater.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Biotechnology & Applied Microbiology
Xueting Song, Bing-Feng Liu, Fanying Kong, Qingqing Song, Nan-Qi Ren, Hong-Yu Ren
Summary: A new microalgal strain, Parachlorella kessleri R-3, was isolated and identified in this study, which demonstrated the ability to utilize various carbon and nitrogen sources. Furthermore, strain R-3 was capable of accumulating substantial biomass and lipids over a wide pH range and adjusting the medium pH to near neutrality during cultivation. The highest algal biomass of 6.90 g L-1, lipid content of 45.12%, and lipid productivity of 340.94 mg L-1 d-1 were achieved under optimal conditions of glucose concentration, sodium nitrate concentration, and initial pH. The predominant fatty acid components were C16:0 iso 3OH and C16:1 w7c alcohol, accounting for up to 88.04% of total fatty acids, indicating the potential application of this microalgal strain in biodiesel production.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Polymer Science
Gabriela Garcia, Juan Eduardo Sosa-Hernandez, Laura Isabel Rodas-Zuluaga, Carlos Castillo-Zacarias, Hafiz Iqbal, Roberto Parra-Saldivar
Summary: Traditional plastics, derived from petroleum and non-biodegradable, contribute to fossil resources depletion and environmental degradation. Polyhydroxyalkanoates, as a promising alternative, accumulate in various microorganisms and are suitable for a wide variety of applications. The study explored the production of polyhydroxyalkanoate by a freshwater microalgae strain and identified significant factors influencing the production, suggesting it as a promising species for producing bio-resources in commercial systems.
Article
Environmental Sciences
Rebecca Nordio, Emanuele Viviano, Ana Sanchez-Zurano, Jose Gonzalez Hernandez, Enrique Rodriguez-Miranda, Jose Luis Guzman, Gabriel Acien
Summary: This study compares different pH and dissolved oxygen control strategies for microalgae production and proposes improved strategies to enhance productivity. The results show that the event-based control strategy is most effective when using freshwater plus fertilizer, while there are no significant differences among different control strategies when wastewater is the nutrient source.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Energy & Fuels
S. M. Zakir Hossain, N. Sultana, M. M. Hossain, S. A. Razzak
Summary: This study investigated the effects of light-dark cycles and NaNO3 dose on Chlorella kessleri microalgal-specific growth rate, biomass productivity, and intracellular lipid productivity. The results of single-objective and multi-response optimization showed the maximum achievable values and the optimal culture conditions for the production of lipid from microalgae. The use of central composite design with desirability function was proven to be useful in designing and operating photobioreactors.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Multidisciplinary Sciences
Paninee Jarungkeerativimol, Afrasiab Khan Tareen, Imrana Niaz Sultan, Muhammad Waseem Khan, Pramuk Parakulsuksatid
Summary: This study found that Ankistrodesmus sp. IFRPD 1061 had a high lipid content under specific phosphorus concentrations. In an open pond cultivation system with the addition of sodium acetate and KH2PO4, lipid accumulation within the algae cells was enhanced.
Article
Green & Sustainable Science & Technology
Abd El-Fatah Abomohra, Hamed Eladel, Soha Mohammed
Summary: The present study successfully isolated a local strain of Protosiphon algae and evaluated its potential for biodiesel production and antioxidant activity of its lipid-free biomass. The results showed that the algae exhibited high biomass and biodiesel productivity under optimal nitrogen conditions, and the lipid-free biomass demonstrated significant antioxidant activity.
Article
Biology
Hunmily Teronpi, Partha Pratim Baruah, Hemchandra Deka
Summary: Microalgae, such as Lobochlamys sp. GUEco1006, can accumulate high lipids under stress conditions, making them promising candidates for biodiesel production. This study found that the alga exhibited best growth and lipid productivity on Bold's Basal Medium, and salinity significantly increased carotenoid content, lipid accumulation, and productivity, suggesting its potential as a lipid trigger for biodiesel production.
Article
Biotechnology & Applied Microbiology
I. Papachristou, S. Akaberi, A. Silve, E. Navarro-Lopez, R. Wuestner, K. Leber, N. Nazarova, G. Mueller, W. Frey
Summary: PEF treatment successfully promoted lipid extraction from Scenedesmus almeriensis, but only in combination with a polar:neutral co-solvent (ethanol:hexane). However, in cascade processing, untreated biomass displayed equal lipid yields due to the disruptive effect of the proteolytic enzymes. Therefore, the positive impact of PEF in this scheme is limited to the improved reaction kinetics exhibited during the enzymatic hydrolysis step.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Biotechnology & Applied Microbiology
Tasneema Ishika, Emeka G. Nwoba, Cherono Kwambai, Navid R. Moheimani
Summary: The harvesting frequency significantly influences the biomass productivity and lipid content of Nannochloropsis. High frequency harvesting is preferred for generating biomass, while lowering the frequency can enhance the lipid content. Proper management of harvesting frequency is crucial to achieve optimum targeted product (biomass and/or lipid).
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Engineering, Environmental
Chaofan Zhang, Shih-Hsin Ho, Anran Li, Liang Fu, Dandan Zhou
Summary: The study suggests that a microalgal co-culture strategy can resist competition stress from bacteria and improve lipid production. The growth inhibition in the co-culture system was significantly reduced, and lipid production was 20-79% higher than that in monocultures.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Biotechnology & Applied Microbiology
Andre E. P. Cunha, Josivaldo R. Satiro, Bruno P. Escobar, Rogerio Ms Simoes
Summary: In this study, activated carbon fibers with high specific surface area were prepared from oyster shells, which showed excellent adsorption performance and cyclic regeneration ability.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Yifei Wang, Everett Eustance, Maria Castillo-Keller, Milton Sommerfeld
JOURNAL OF APPLIED PHYCOLOGY
(2017)
Article
Engineering, Environmental
Yun Zhou, YenJung Sean Lai, Everett Eustance, Levi Straka, Chen Zhou, Siqing Xia, Bruce E. Rittmann
Article
Biotechnology & Applied Microbiology
Yifei Wang, Maria Castillo-Keller, Everett Eustance, Milton Sommerfeld
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2017)
Article
Biotechnology & Applied Microbiology
Yun Zhou, Everett Eustance, Levi Straka, YenJung Sean Lai, Siqing Xia, Bruce E. Rittmann
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2018)
Article
Multidisciplinary Sciences
Siqing Xia, Yun Zhou, Everett Eustance, Zhiqiang Zhang
SCIENTIFIC REPORTS
(2017)
Article
Biotechnology & Applied Microbiology
YenJung Sean Lai, Yun Zhou, Everett Eustance, Levi Straka, Zhaocheng Wang, Bruce E. Rittmann
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2018)
Article
Chemistry, Multidisciplinary
Yun Zhou, YenJung Sean Lai, Everett Eustance, Bruce E. Rittmannt
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2019)
Article
Environmental Sciences
Yun Zhou, Andrew K. Marcus, Levi Straka, Everett Eustance, YenJung Sean Lai, Siqing Xia, Bruce E. Rittmann
Article
Biotechnology & Applied Microbiology
Yun Zhou, YenJung Sean Lai, Everett Eustance, Siqing Xia, Bruce E. Rittmann
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2019)
Article
Engineering, Chemical
Tarun Shesh, Everett Eustance, Yen-Jung Lai (Sean), Bruce E. Rittmann
JOURNAL OF MEMBRANE SCIENCE
(2019)
Article
Biotechnology & Applied Microbiology
Everett Eustance, Yen-Jung Sean Lai, Tarun Shesh, Bruce E. Rittmann
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2020)
Article
Biotechnology & Applied Microbiology
YenJung Sean Lai, Everett Eustance, Tarun Shesh, Bruce E. Rittmann
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2020)
Article
Environmental Sciences
Gamze Dogdu Okcu, Everett Eustance, YenJung Sean Lai, Bruce E. Rittmann
Summary: The study investigated the competition or co-existence of diatom Chaetoceros gracilis and coccolithophore Pleurochrysis Carterae in laboratory conditions. Results showed that monoculture of C. gracilis had higher growth rate and productivity compared to P. carterae. Co-culture resulted in a slower growth rate for P. carterae, with no significant impact on pigment production. Ash content increased at lower silicate concentrations, with SiO2 being the dominant component.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
YenJung Sean Lai, Everett Eustance, Tarun Shesh, Zoe Frias, Bruce E. Rittmann
Summary: Membrane carbonation (MC) using fiber membranes can achieve high carbon transfer efficiency. Inert gases in the membrane lumen can be eliminated by a venting strategy. When integrated with marine coccolithophores, MC enables efficient CO2 delivery and venting, with effective CO2 fixation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Liang Guo, Qirui Wu, YenJung Sean Lai, Everett Eustance, Bruce E. Rittmann
Summary: Microalgal-based processes show promise in addressing phosphorus recovery from wastewater and biofuel production. This study investigated the impact of phosphorus supply on microalgal growth, lipid yield, and phosphorus distribution for Scenedesmus during nitrogen starvation. Extracellular polymeric substances and intracellular polymeric substances were the main storages for inorganic phosphorus and organic phosphorus, respectively. Under low phosphorus supply, the main phosphorus pool for microalgae was extracellular polymeric substances, while high phosphorus concentrations stored most phosphorus in intracellular polymeric substances. High orthophosphate concentration stimulated rapid phosphorus uptake and promoted its transformation to organic phosphorus during biomass synthesis. The highest phosphorus content in microalgal biomass was 6.5% of dry weight at a phosphorus concentration of 113 mg/L, while the organic phosphorus content was 4.9% of dry weight. High phosphate-P availability enhanced microalgal biomass synthesis, lipid production, and phosphorus accumulation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)