Article
Energy & Fuels
Ke Li, Jie Chen, Xiao-an Nie
Summary: The study shows that glycerol in pre-esterification of waste oil can reduce the acid value to a lower level in one step, and the optimized process conditions obtained through orthogonal experiment can achieve high conversion rate and good environmental protection, making it easier to realize the continuous synthesis of biodiesel from waste oil with high acid.
Article
Energy & Fuels
Issara Chanakaewsomboon, Khamphe Phoungthong, Arkom Palamanit, Vatcharee Seechamnanturakit, Chin Kui Cheng
Summary: This study investigates the effects of reaction time, FFA content, catalyst amount, and soap formation during transesterification reactions. It was found that high FFA content leads to increased soap formation, and the optimal catalyst amount for meeting biodiesel standards is 1.0 wt% of oil.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Biotechnology & Applied Microbiology
Nur Hidayah Mat Yasin, Nur Nadiah Che Aziz, Muhammad Badrun Amin Azmai, Mohamad Fitri Mohd Hanapi
Summary: This study investigated the effect of different solvents on the production of fatty acid methyl esters (FAMEs) from Chlorella vulgaris using two different methods of transesterification: direct transesterification (d-trans) and extraction transesterification (ext-trans). Different solvents were expected to lead to different amounts of FAMEs. Two solvents (methanol and ethanol) with volumes of each of 10,12 and 14 mL were selected to produce higher amounts of FAMEs.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Energy & Fuels
Mohamed Mokhatr Mohamed, Hossam El-Faramawy
Summary: A novel catalyst synthesized for biodiesel production showed high efficiency and quality. The optimal reaction conditions were identified and the mechanism of the catalytic reaction was investigated.
Review
Biotechnology & Applied Microbiology
Dylan Karis, Robert Cain, Kenneth Young, Alexander Shand, Trevor Holm, Ethan Springer
Summary: Biodiesel has been a pioneer in green fuel alternatives, and recent advancements in decarboxylation have increased interest in renewable diesel. However, traditional biodiesel producers are concerned about the disruption to the supply chain and market demand, while biodiesel also has many non-fuel applications.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2022)
Article
Energy & Fuels
Mariana Albarello, Ana Luiza Barrachini Nunes, Liara Jalime Vernier, Fernanda de Castilhos
Summary: The present study aimed at investigating the interesterification reaction for the production of FAME from DSO in pressurized MeA catalyzed by NbOPO4. Important factors such as temperature, catalyst content, and DSO:MeA molar ratio were studied and optimized. An FAME yield of 87.48% was obtained by using 345°C, 8 wt% catalyst, and an MR of 1:35 in 60 min of reaction. The catalyst showed activity and a decrease in activity was observed in the reuse test.
BIOENERGY RESEARCH
(2023)
Article
Chemistry, Physical
Khawer Khan, Noaman Ul-Haq, Wajeeh Ur Rahman, Muzaffar Ali, Umer Rashid, Anwar Ul-Haq, Farrukh Jamil, Ashfaq Ahmed, Faisal Ahmed, Bryan R. Moser, Ali Alsalme
Summary: The synthesis of biodiesel from Jatropha curcas by transesterification using both KOH and CaO catalysts was explored, with optimization of reaction conditions leading to high yields. The fuel properties of the optimized biodiesel met ASTM D6751 standards, while the 5% blends in petroleum diesel met ASTM D975 standards.
Article
Energy & Fuels
Ana Carolina Lima, Khadidja Hachemane, Antonio E. Ribeiro, Ana Queiroz, Maria Carolina Sergi Gomes, Paulo Brito
Summary: Ionic liquid choline hydroxide (ChOH) was successfully applied as a catalyst for the transesterification reaction of triacylglycerols present in sunflower oil with methanol. The experimental results showed that a high ester yield can be achieved in a short reaction time under specific conditions. Kinetic modeling study indicated that a first-order model is the best fit for the reaction.
Review
Thermodynamics
Nguyen Tien Thanh, Marhaini Mostapha, Man Kee Lam, Syukriyah Ishak, Yaleeni Kanna Dasan, Jun Wei Lim, Inn Shi Tan, Sie Yon Lau, Bridgid Lai Fui Chin, Tony Hadibarata
Summary: This review provides a comprehensive understanding of the in-situ transesterification process for biodiesel production from microalgae biomass. It discusses the effect of processing parameters, technoeconomic impact, biodiesel composition, reaction kinetics, and thermodynamics. The review also highlights the importance of process design and identifies research gaps for future study.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Review
Green & Sustainable Science & Technology
Fatima Akram, Ikram ul Haq, Saleha Ibadat Raja, Azka Shahzad Mir, Sumbal Sajid Qureshi, Amna Aqeel, Fatima Iftikhar Shah
Summary: This article reviews different feedstocks and strategies for biodiesel production, as well as production methods and catalyst types. The challenges and technical solutions for sustainable biodiesel production are also assessed in this review.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Chee Yoong Chooi, Jia Huey Sim, Shiau Foon Tee, Zhi Hua Lee
Summary: The research focuses on developing a kinetic mechanism for biodiesel production catalyzed by a CaO nanocatalyst derived from waste cockle shells via thermal hydration-dehydration treatment. The transesterification reaction follows a Langmuir-Hinshelwood kinetic mechanism with surface reaction as the rate-limiting step, offering a relatively low activation energy and high FAME yield. The optimal conditions for preparing the nano CaO catalyst and conducting transesterification reactions were investigated and demonstrated promising results for potential industrial applications.
Article
Acoustics
Mohammed Shahidul Islam, Cari Robin Hart, Dominick Casadonte
Summary: This study investigated the sonochemical transesterification of Lesquerella fendleri oil (LFO) using inexpensive solid Lewis acid catalysts. The results showed that AlCl3 was the best catalyst among the LA catalysts tested, and ultrasound increased the reaction rate. The method was found to be fast, green, energy-efficient, sustainable, and industrially applicable for biodiesel production.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Green & Sustainable Science & Technology
Amirmahdi Bahadorian, Seyed Mojtaba Sadrameli, Hassan Pahlavanzadeh, Mohammad Nabi Ilani Kashkouli
Summary: In this study, biodiesel was produced from non-edible and inexpensive linseed by in-situ transesterification method, and the residue from the process was converted into valuable products through slow pyrolysis. Experimental design was carried out to optimize the process, and high purity and yield of biodiesel were obtained under the determined optimal conditions.
Article
Biotechnology & Applied Microbiology
Hideo Maruyama, Keito Fukuchi, Hideshi Seki
Summary: The aim of this study is to develop a simulation model for the fractionation of fatty acid methyl esters (FAME) using urea complexation. The different complexation behaviors of SFAME, MFAME, and PFAME were observed, and a fractionation model was proposed to explain the observed phenomena.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Ayesha Mushtaq, Muhammad Asif Hanif, Muhammad Zahid, Umer Rashid, Zahid Mushtaq, Muhammad Zubair, Bryan R. Moser, Fahad A. Alharthi
Summary: Biodiesel has many advantages compared to conventional petroleum diesel, but its high production costs, poor low temperature operability, and variability of fuel quality have limited its widespread adoption. This study used inedible tamarind seed oil as a feedstock and employed high vacuum fractional distillation and various catalytic reactions to produce consistent quality biodiesel, overcoming the low temperature performance issue.
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)