Review
Biotechnology & Applied Microbiology
Ademola Owoade, Ali S. Alshami, David Levin, Sagheer Onaizi, Zuhair O. Malaibari
Summary: Syngas, produced through thermochemical conversion of biomass or from CO-rich off-gases, can be converted into alcohols and other compounds by acetogenic bacteria using the Wood-Ljungdahl metabolic pathway. The fermentation of syngas is influenced by various factors such as bacteria species, syngas composition, medium components, bioreactor type, operational parameters, and gas-liquid mass transfer rate. This article focuses on gas composition, microorganisms, fermentation strategies, medium design, and commercialization activities to develop syngas fermentation processes.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2023)
Article
Chemistry, Multidisciplinary
Andrey A. Kuznetsov, Ivan A. Podlesnykh
Summary: The study investigates the equilibrium concentration distribution of magnetic nanoparticles in a nonuniform magnetic field, obtaining an exact solution for dilute monodisperse suspensions and testing its applicability in a broad range of amperage values. The solution is also generalized for polydisperse suspensions, revealing that particle size distribution in such systems strongly depends on the distance from the wire and generally does not coincide with the original distribution of a uniform suspension.
Review
Thermodynamics
Sungyup Jung, Nagaraj P. Shetti, Kakarla Raghava Reddy, Mallikarjuna N. Nadagouda, Young-Kwon Park, Tejraj M. Aminabhavi, Eilhann E. Kwon
Summary: Livestock manures have the potential to be utilized as abundant feedstocks for biofuels, but they are currently underutilized and limited to specific applications. Further research and development are needed to explore their full potential in biofuel production.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Swayamsidha Pati, Mahendra Kumar Mohanty, Swati Mohapatra, Deviprasad Samantaray
Summary: This study focuses on sustainable bioethanol production using lignocellulosic biomass as feedstock through syngas fermentation. Enterobacter hormaechei RF2, a high ethanol-tolerant and genetically stable bioethanol producer, was identified as a potential candidate for pilot-scale production. The research findings pave the way for the commercialization of green chemicals and provide an intriguing future for our global economy.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Engineering, Environmental
Sambit Dutta, Hariklia N. Gavala, Ioannis Skiadas
Summary: This study aims to develop a model to simulate the mass transfer of gases to the liquid phase, as well as a model to predict the volumetric mass transfer coefficient of specific gases under different flow rates and reactor configurations. The models were validated using experimental data and the predicted kLa values had a reasonable range of error.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Huaming Dai, Zhichao Wang, Cheng Zhai
Summary: Green energy from biomass played a significant role in substituting traditional fossil fuels and protecting the environment. A porous media burner was designed for efficient ethanol vaporization, and the partial oxidation characteristics of ethanol were investigated. The addition of acetic acid and methanol inhibited hydrogen production but promoted methane production, and blended fuels resulted in more syngas production at higher equivalence ratios and velocities. These findings provide a theoretical reference for the industrial application of bioethanol.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Tamara Jankovic, Adrie J. J. Straathof, Anton A. Kiss
Summary: This research proposes a novel downstream process for recovering bioethanol in an energy-efficient and cost-effective manner. Advanced separation and purification techniques are used to recover 99.5% of initially present ethanol as a high-purity product. The implementation of these techniques significantly reduces costs, energy requirements, CO2 emissions, and fresh water usage.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Chemical
Lars Puiman, Britt Abrahamson, Rob G. J. M. van der Lans, Cees Haringa, Henk J. Noorman, Cristian Picioreanu
Summary: The mass transfer limitations in syngas fermentation processes can be alleviated by using large-scale external-loop gas-lift reactors, which enable high mass transfer performance. A CFD model was developed and validated to provide insights on the hydrodynamics and mass transfer in these reactors. The results showed that the ethanol produced in the process could increase gas hold-up and decrease bubble diameter, leading to high mass transfer efficiency.
CHEMICAL ENGINEERING SCIENCE
(2022)
Review
Biotechnology & Applied Microbiology
Marina P. Elisiario, Heleen De Wever, Wouter Van Hecke, Henk Noorman, Adrie J. J. Straathof
Summary: Syngas fermentation for biofuels and chemicals is a promising technology in the biobased economy. Membrane bioreactors show potential in overcoming limitations in gas-to-liquid mass transfer, with parameters like membrane material, module, and flow configuration playing key roles in enhancing performance. Model-based approaches are recommended for optimizing membrane bioreactor performance.
CRITICAL REVIEWS IN BIOTECHNOLOGY
(2022)
Article
Energy & Fuels
Areej Shahbaz, Nazim Hussain, Muhammad Zafar Saleem, Muhammad Usama Saeed, Muhammad Bilal, Hafiz M. N. Iqbal
Summary: Fossil fuels have caused irreversible damage to the ecosystem, making it crucial to find alternatives. The use of nanoparticles to accelerate the production of biofuels shows great potential. Additionally, nanocatalysts can also be efficiently utilized in other areas.
Article
Biotechnology & Applied Microbiology
Lars Puiman, Marina P. Elisiario, Lilo M. L. Crasborn, Liselot E. C. H. Wagenaar, Adrie J. J. Straathof, Cees Haringa
Summary: Gas-to-liquid mass transfer is a limiting process in gas fermentations. The components in fermentation broths have a significant impact on mass transfer. The addition of ethanol can greatly increase the mass transfer efficiency.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Gabriela Huminic, Angel Huminic
Summary: This study proposes a new working fluid for absorption systems that improves thermal properties and heat transfer characteristics. The results show that by adding nanoparticles to the ionic liquid, the thermal conductivity of the solution is enhanced while the viscosity and specific heat are reduced.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Biotechnology & Applied Microbiology
Elisa M. de Medeiros, Henk Noorman, Rubens Maciel Filho, John A. Posada
Summary: This work optimized the production process of ethanol through integrated gasification and syngas fermentation using a multi-objective genetic algorithm, revealing that using wood residues as feedstock led to lower costs and carbon footprint, while achieving the same energy efficiency.
FERMENTATION-BASEL
(2021)
Article
Energy & Fuels
Milad Ahmadi, Fatemeh Bahadori
Summary: This study simulates the production of liquid hydrocarbons as synthetic fuels using bioethanol reforming and proposes two different processes. The results show that the H-2/CO ratio of the syngas produced from ESR is 5, and it is modified to 2.5 and 2 in ESR+EDR, which is suitable for the production of liquid hydrocarbons in the gasoline range.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2022)
Article
Thermodynamics
Francesco Regis, Alessandro Hugo Antonio Monteverde, Debora Fino
Summary: This study presents a reproducible model of ethanol production process to enhance ethanol yield and carbon yield. By gasifying pretreated switchgrass and fermenting the syngas to ethanol, a remarkable ethanol yield of 1015.04 L/t can be obtained. The minimum ethanol selling price is 1.07 $/L for the base scenario and is further lowered to 0.77 $/L for the 2050 H2 scenario.
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)