Article
Biotechnology & Applied Microbiology
Violette Turon, Stephane Ollivier, Gregory Cwicklinski, John C. Willison, Zoe Anxionnaz-Minvielle
Summary: Hydrogen production by Rhodobacter capsulatus requires specific mixing conditions and an innovative plate-type photobioreactor design with meandering channels has been proposed. The flow rate of hydrogen production was significantly increased by testing different bacterial concentrations and the maximum flow rate achieved was among the highest reported values for R. capsulatus, showing great potential for future scale-up of similar reactors.
BIOTECHNOLOGY AND BIOENGINEERING
(2021)
Article
Chemistry, Physical
F. Betol Oflaz, Harun Koku
Summary: A custom pH control system was installed to address acidification issues in photofermentative hydrogen production from sugar-based nutrients, achieving a 48-day continuous hydrogen production run with molasses. The highest hydrogen productivity reached 0.69 molH(2)/(m(3).h).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Biotechnology & Applied Microbiology
Catharine Elizabeth Bosman, Robert William McClelland Pott, Steven Martin Bradshaw
Summary: This study evaluates the use of a thermosiphon photobioreactor (TPBR) for photofermentative hydrogen production. The results show that biomass concentration has a significant impact on hydrogen production and biomass suspension. The optimal operating conditions were determined using response surface methodology, and maximum specific hydrogen production rates and biomass suspension rates were predicted.
BIOENGINEERING-BASEL
(2022)
Article
Chemistry, Physical
Brandon Sean Ross, Robert W. M. Pott
Summary: Biohydrogen production via photofermentation has low environmental impact and can be integrated into wastewater treatment systems. However, current production rates are low compared to industrial processes, requiring improvement. One strategy for enhancing productivity is the development of improved photobioreactor systems. This study compared hydrogen productivity of Rhodopseudomonas palustris under different cell conditions, with the fluidized bed PBR achieving the highest specific hydrogen production rate and substrate conversion efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Biotechnology & Applied Microbiology
Catharine Elizabeth Bosman, Robert William McClelland Pott, Steven Martin Bradshaw
Summary: One of the main factors affecting hydrogen production and growth of photofermentative microorganisms is light. This study investigated light distribution in a thermosiphon photobioreactor and evaluated a reflector system for enhancing light distribution. Experimental results showed that the addition of the reflector system increased hydrogen production by 48% and glycerol consumption from 24% to 32%. These findings suggest that the reflector system is a viable option for enhancing light distribution in photobioreactors, leading to increased hydrogen production and glycerol consumption.
JOURNAL OF BIOTECHNOLOGY
(2023)
Article
Energy & Fuels
Dahbia Akroum-Amrouche, Hamza Akroum, Hakim Lounici
Summary: This paper reviews the photo-fermentative biohydrogen production using Rhodobacter sphaeroides, a promising technology, and discusses several strategies to improve its economic efficiency, cost-effectiveness, and productivity. The use of co-cultures and genetic modification techniques have been shown to enhance the yield and rate of hydrogen production. Additionally, employing organic wastes as substrates in various reactor designs has been proven to achieve high conversion efficiency of the substrate and light energy.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2023)
Article
Thermodynamics
F. S. Moreira, M. S. Rodrigues, L. M. Sousa, F. R. X. Batista, J. S. Ferreira, V. L. Cardoso
Summary: This study investigated the production of hydrogen using photofermentation with a co-culture of Enterobacter cloacae and either Rhodobacter capsulatus or Rhodopseudomonas palustris, along with the addition of glucose or lactose from milk whey permeate. The co-culture system achieved high hydrogen productivity and organic acid concentration.
Article
Multidisciplinary Sciences
Jonathan Deseure, Jamila Obeid, John C. Willison, Jean-Pierre Magnin
Summary: This study examined the experimental results of hydrogen production through anaerobic photosynthesis using the purple non-sulfur bacterium Rhodobacter capsulatus. The research utilized continuous stirred tank reactors (CSTR) technique to analyze kinetic parameters and models like Luedeking-Piret and Gompertz to simulate hydrogen production and bacterial growth. The mathematical description suggested that photofermentation is a more promising method than dark fermentation for converting organic substrates into biogas.
Article
Engineering, Environmental
Leticia de Moura Sousa, Felipe Santos Moreira, Vicelma Luiz Cardoso, Fabiana Regina Xavier Batista
Summary: The research evaluates the effectiveness of Rhodobacter capsulatus in removing hexavalent chromium and total chromium contamination. The study shows complete removal of hexavalent chromium, with faster removal times observed at higher light intensities. Maximum removal of total chromium occurs at 5,670 lx and low initial concentrations of hexavalent chromium. Increasing light intensity promotes cell growth and pigment production. The final pigment contents are 2.22 mg/m3 (bacteriochlorophyll) and 1.44 mg/m3 (carotenoid).
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Bovinille Anye Cho, Elze Grobler, Robert William McClelland Pott, Ehecatl Antonio del Rio Chanona, Dongda Zhang
Summary: Optimization and upscaling of biohydrogen production in externally pumped-recirculated photobioreactors (PBRs) are hindered by the high computational cost of coupling hydrodynamics, light transmission, and bioreaction transport. This study approximates the complexities of peristaltic pump with inlet-outlet boundary conditions, introduces mean residence time for updating boundary conditions, and unifies tm-dependent accelerated growth kinetics to parallelized Computational Fluid Dynamic (CFD) environment.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Environmental Sciences
Marcin Debowski, Magda Dudek, Anna Nowicka, Piera Quattrocelli, Joanna Kazimierowicz, Marcin Zielinski
Summary: The use of pre-digested milk-industry effluent to cultivate Tetraselmis subcordiformis has shown to be efficient in producing biomass and hydrogen. The addition of 25% and 50% effluent in the growth medium resulted in the highest production of biomass and over 60% hydrogen in the biogas. However, increasing the effluent to 75% led to a significant deterioration in performance.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Chemistry, Physical
Kamal Elkahlout, Emrah Sagir, Siamak Alipour, Harun Koku, Ufuk Gunduz, Inci Eroglu, Meral Yucel
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Chemistry, Physical
Muazzez Gurgan, Harun Koku, Inci Eroglu, Meral Yucel
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Biotechnology & Applied Microbiology
Onur Bulut, Dilan Akin, Cagla Sonmez, Aysegul Oktem, Meral Yucel, Huseyin Avni Oktem
JOURNAL OF APPLIED PHYCOLOGY
(2019)
Article
Microbiology
Nilufer Afsar Erkal, Muazzez Gurgan Eser, Ebru Ozgur, Ufuk Gunduz, Inci Eroglu, Meral Yucel
ARCHIVES OF MICROBIOLOGY
(2019)
Article
Chemistry, Physical
Burcu Ozsoy Demiriz, Gokhan Kars, Meral Yucel, Inci Eroglu, Ufuk Gunduz
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Crystallography
Gaye O. Cakal, Berk Baltaci, Goknur Bayram, Saim Ozkar, Inci Eroglu
JOURNAL OF CRYSTAL GROWTH
(2020)
Article
Chemistry, Physical
Muazzez Gurgan, Harun Koku, Inci Eroglu, Meral Yucel
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Engineering, Electrical & Electronic
Ali Can Atik, Metin Dundar Ozkan, Ebru Ozgur, Haluk Kulah, Ender Yildirim
JOURNAL OF MICROMECHANICS AND MICROENGINEERING
(2020)
Article
Chemistry, Physical
Berna Sezgin, Yilser Devrim, Tayfur Ozturk, Inci Eroglu
Summary: The most critical development in conventional underwater applications in recent years is the use of hydrogen energy systems, particularly Air Independent Propulsion (AIP) systems powered by Proton Exchange Membrane (PEM) fuel cells. These systems have gained worldwide interest due to their advantages in terms of longer endurance time, silent operation, environmental friendliness, high efficiency, and low thermal dissipation. However, the storage of hydrogen presents a significant challenge in terms of quality, weight, and volume. Different hydrogen storage techniques are required for unmanned underwater vehicles with varying volume and weight requirements.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Analytical
Gurhan Ozkayar, Ege Mutlu, Sebnem Sahin, Yagmur Demircan Yalcin, Taylan Toral, Haluk Kulah, Ender Yildirim, Ozge Zorlu, Ebru Ozgur
Article
Meteorology & Atmospheric Sciences
Atsushi Inagaki, Yovita Wangsaputra, Manabu Kanda, Meral Yucel, Naoyuki Onodera, Takayuki Aoki
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)