Article
Biotechnology & Applied Microbiology
Manuel Cuevas, Juan F. Garcia Martin, Vicente Bravo, Sebastian Sanchez
Summary: This study investigated the potential of producing bioethanol from olive stones through liquid hot-water pre-treatment and subsequent enzymatic hydrolysis. The results showed that under the most suitable conditions, 6.4 dm(3) of ethanol per 100 kg of olive stones could be produced through this process.
FERMENTATION-BASEL
(2021)
Article
Environmental Sciences
Ioanna Ntaikou, Sviatlana Siankevich, Gerasimos Lyberatos
Summary: The study shows that thermo-chemical pretreatment can significantly enhance the enzymatic digestibility of olive mill stones (OMS) and valorize the generated free sugars into alcohols. By adjusting parameters such as reaction time, temperature, type and concentration of dilute acids and bases, higher ethanol and xylitol yields can be obtained.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Environmental Sciences
Jiaxin Chen, Xin Wang, Biying Zhang, Yifan Yang, Yangbo Song, Fan Zhang, Bianfang Liu, Yuan Zhou, Yanglei Yi, Yuanyuan Shan, Xin Lu
Summary: The study investigated the optimization of subcritical water pretreatment and high solid hydrolysis for improving the conversion efficiency of bioethanol from wheat straw. Accumulation of lignin in solid residue after enzymatic hydrolysis was found to not affect the efficiency of bioethanol conversion, indicating a promising strategy for utilizing all components of lignocellulosic biomass.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Biochemistry & Molecular Biology
Francis Dave C. Siacor, Camila Flor Y. Lobarbio, Evelyn B. Taboada
Summary: This study addresses the challenges faced by the Biofuels Act of 2007 in the Philippines by exploring the potential of mango seed husk (MSH) as a feedstock for bioethanol production. Results show that a combined process strategy of dilute acid pretreatment followed by enzymatic hydrolysis can increase the concentration and yield of sugars in the hydrolysates, which is advantageous for bioethanol production.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2021)
Article
Agricultural Engineering
Jie Zhao, Xuxiong Tao, Junfeng Li, Yushan Jia, Tao Shao
Summary: Silencing rice straw with dilute formic acid can reduce the cost of lignocellulosic pretreatment and improve fermentation dynamics and enzymatic hydrolysis. The use of 0.6% formic acid showed the best results in promoting hemicellulose removal and xylose production, leading to increased cellulose convertibility and glucose yield.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Imen Ben Atitallah, Georgia Antonopoulou, Ioanna Ntaikou, Amaia Soto Beobide, Vassilios Dracopoulos, Tahar Mechichi, Gerasimos Lyberatos
Summary: The effect of different pretreatment approaches based on alkali/hydrogen peroxide on willow sawdust biomass was investigated. The two-stage pretreatment approach led to higher delignification and saccharification efficiency, as well as higher ethanol concentration and yield. Co-cultures of Saccharomyces cerevisiae or Wickerhamomyces anomalus X19 with Pichia stipitis exhibited the highest ethanol yields.
Article
Thermodynamics
I. Ntaikou, M. Alexandropoulou, M. Kamilari, S. A. Alamri, Y. S. Moustafa, M. Hashem, G. Antonopoulou, G. Lyberatos
Summary: This study investigated the use of a starchy food waste, mainly cooked wasted rice (WR), for bioethanol production using novel yeast strains. Different pretreatment schemes were evaluated to maximize the liberation of fermentable carbohydrates and their conversion to ethanol. The fermentation tests showed that the combined pretreatment led to the maximum saccharification, and the fermentation efficiencies were higher for Kluyveromyces marxianus isolate V3-19. However, for the highest organic loading of WR, kinetic restrictions occurred and some soluble carbohydrates remained unexploitable.
Article
Materials Science, Paper & Wood
Florentyna Akus-Szylberg, Andrzej Antczak, Janusz Zawadzki
Summary: The effects of soaking aqueous ammonia pretreatment on fast-growing poplar wood for bioethanol production were studied. Results showed that higher temperature and ammonia concentration during pretreatment led to increased glucose content and reduced lignin content in the biomass, ultimately impacting sugar yield. Additionally, changes in polymerization degree and pore volume were investigated to further understand the impact of pretreatment conditions.
Article
Agricultural Engineering
Fanyang Meng, Jing Fan, Fei Cui, Haiyan Yang, Zhengjun Shi, Dawei Wang, Jing Yang
Summary: This study proposed an innovative and efficient pre-treatment method using peroxy-citric acid (HPCA) to enhance enzymatic hydrolysis and bio-ethanol production of bamboo residues. HPCA-treated bamboo residues showed significantly higher enzymatic saccharification yield compared with citric acid (CA) pretreated residues. The removal of lignin and xylan was also effectively achieved by HPCA. Ethanol recovery of 17.18 g/L was achieved. This work provides a reference for mild biomass pretreatment using organic peracids.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Oznur Yildirim, Bestami Ozkaya, Mahmut Altinbas, Ahmet Demir
Summary: Central composite design was used to optimize sugar recovery from cotton straw and sunflower straw using dilute acid pretreatment. The study identified the optimum pretreatment conditions for maximum sugar yield and demonstrated high ethanol production efficiency through fermentation. The results provide valuable insights for the commercialization of bioprocesses converting lignocellulosic waste into high value-added products in a biorefinery context.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Longinus Ifeanyi Igbojionu, Cecilia Laluce
Summary: This study optimized the enzymatic digestibility of sugarcane bagasse through a two-step alkaline and acid pretreatment, resulting in high glucose yields. The process parameters were optimized using response surface methodology, and the glucose yield achieved was close to the predicted value. This study highlights the potential of efficient fermentable sugar production from sugarcane bagasse.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Agricultural Engineering
Wei Tang, Zhengyu Tang, Haojie Qian, Caoxing Huang, Yu-Cai He
Summary: Exploiting bamboo shoot shells (BSS) as feedstocks for biorefining is crucial for improving the bioavailability of bamboo shoots. This study used the traditional dilute sulfuric acid pretreatment (DAP) method to treat BSS and simultaneously prepared a solid-acid-catalyst using BSS as a carrier. Biocatalysis and enzymatic hydrolysis were then performed to efficiently convert the carbohydrates of the pretreated BSS. The results showed that using 0.1 g/L H2SO4 during DAP achieved optimal furfural conversion of BSS, reaching a maximum of 41%. The enzymatic hydrolysis efficiency of the pretreated BSS also reached a maximum of 97%. This increase in efficiency was attributed to improved accessibility, cellulosic crystal size, and reduced lignin surface area in BSS. Overall, DAP technology enabled efficient utilization and bioconversion of BSS carbohydrates.
BIORESOURCE TECHNOLOGY
(2023)
Review
Thermodynamics
Barsha Samantaray, Sonali Mohapatra, Rashmi Ranjan Mishra, Bikash Chandra Behera, Hrudayanath Thatoi
Summary: The scientific community is currently focused on producing bioethanol from lignocellulosic biomass as a renewable resource of biofuel. Bioethanol is a viable alternative to fossil fuels and offers a cheap and environmentally friendly energy source. However, economic production of bioethanol is hindered by various factors such as biomass transportation, pretreatment for delignification, enzymatic hydrolysis, and suitable fermentative organisms.
INTERNATIONAL JOURNAL OF GREEN ENERGY
(2023)
Article
Agricultural Engineering
Yequan Sheng, Yong Xu
Summary: The addition of ascorbic acid enhances lignin decomposition and cellulose conversion in dilute acid pretreatment, with a dose-dependent effect. NMR analysis shows that ascorbic acid significantly stimulates decomposed lignins compared to residual bulk lignins, leading to increased cellulose conversion. Therefore, ascorbic acid can improve the cellulose conversion rate of pretreated materials.
BIORESOURCE TECHNOLOGY
(2022)
Article
Energy & Fuels
Neelu Raina, Parvez Singh Slathia, Preeti Sharma
Summary: In this study, bioethanol production was successfully achieved through thermochemical pretreatment and enzymatic hydrolysis fermentation of deodar sawdust, a potential substrate from the furniture industry. The pretreatment and enzymatic hydrolysis processes were optimized using response surface methodology, resulting in higher ethanol concentration and conversion efficiency.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Chemical
Eddy Plasquy, Jose Maria Garcia Martos, Maria del Carmen Florido Fernandez, Rafael Ruben Sola-Guirado, Juan Francisco Garcia Martin
Summary: The study examines the use of warm water to warm up olives before grinding to maintain a desired temperature, which is crucial for high-quality oil extraction. Results show the feasibility of the method and potential for further automation to improve efficiency and quality in olive processing.
Review
Engineering, Chemical
Francisco Jose Sanchez-Borrego, Paloma Alvarez-Mateos, Juan F. Garcia-Martin
Summary: Bio-oil is a promising source of chemicals and renewable fuels that can replace fossil fuels and be produced through pyrolysis. It contains various value-added chemicals, such as aromatic compounds, suitable for a range of applications.
Editorial Material
Engineering, Chemical
Miguel Torres-Garcia, Paloma Alvarez-Mateos, Juan Francisco Garcia-Martin
Article
Engineering, Chemical
Carmen C. Barrios, Paloma Alvarez-Mateos, Ana Uruena, David Diez, Juan Francisco Garcia-Martin
Summary: The study aimed to assess the impact of adding an oxygenated additive to biodiesel in reducing particle emissions from engines without diesel particle filters. Results showed that certain blends increased NOx emissions, while one specific blend significantly reduced total particle number and NOx emissions.
Review
Engineering, Chemical
Eddy Plasquy, Jose Maria Garcia-Martos, Maria C. Florido, Rafael Ruben Sola-Guirado, Juan Francisco Garcia Martin
Summary: Research on cold storage of olive fruit has been conducted for over 50 years, with a focus on the physiological response and oil quality impact. The changing climate, new harvesting techniques, and consumer demands are expanding the need for diverse temperature management. Future prospects of research are based on the current state of cold storage research and broader fruit temperature management perspective.
Article
Food Science & Technology
Karine Cristine Kaufmann, Klicia Araujo Sampaio, Juan F. Garcia-Martin, Douglas Fernandes Barbin
Summary: The study demonstrates that coriander oil can be effectively distinguished from adulterated oils using principal component analysis, linear discriminant analysis, and k-nearest neighbors algorithm. The performance of Partial Least Squares regression models also shows their potential utility in quality control processes.
Article
Agronomy
Francisco-Jose Sanchez-Borrego, Noelia Garcia-Criado, Juan F. Garcia-Martin, Paloma alvarez-Mateos
Summary: This study investigates the pyrolysis of orange waste and orange pruning to produce biochar and bio-oil for high-added-value compounds. The obtained biochar showed potential for reducing the sulphur content in waste cooking oil.
Article
Plant Sciences
Francisco Jose Sanchez-Borrego, Tomas Juan Barea de Hoyos-Limon, Juan Francisco Garcia-Martin, Paloma Alvarez-Mateos
Summary: Olive stones can be valorized through pyrolysis to obtain biochar and bio-oil, with temperature being the key parameter affecting the product distribution. Impregnated olive stones result in higher amounts of high-added-value products. The specific surface area of biochar has an impact on the esterification yield.
Review
Chemistry, Analytical
Juan Francisco Garcia Martin
Summary: The physico-chemical parameters of olive oil quality can be effectively measured using near-infrared spectroscopy (NIRS), with high precision for several important parameters. NIRS is suitable for predicting nutritional contents and has the potential for analyzing other parameters, although further improvement of mathematical models is required.
Article
Engineering, Chemical
Sebastian Sanchez, Inmaculada Olivares, Juan G. Puentes, Rafael Orpez, M. Dolores La Rubia, Rafael Pacheco, Juan F. Garcia Martin
Summary: The addition of high-purity NMT improved the extraction yields and quality of olive oil, especially enhancing the content of antioxidant compounds and increasing the oxidative stability of the oil.
Editorial Material
Engineering, Chemical
Juan Francisco Garcia Martin, Miguel Torres Garcia, Paloma Alvarez Mateos
Review
Acoustics
Qing-An Zhang, Hongrong Zheng, Junyan Lin, Guangmin Nie, Xuehui Fan, Juan Francisco Garcia-Martin
Summary: As a non-thermal physical technology, ultrasound is widely used in various food processing operations, including filtration, freezing, thawing, sterilization, cutting, extraction, aging, etc. It is also applied in the processing of meat products, fruits and vegetables, and dairy products. However, there is a lack of systematic sorting and summarizing of the impact of ultrasound on different characteristics of wine. This review aims to systematically summarize the current achievements and problems of ultrasound application in winemaking, including extraction, fermentation, aging, and sterilization, and discuss its advantages, disadvantages, and future development.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Engineering, Chemical
Antonio Rosales Martinez, Juan F. Garcia-Martin, Ignacio Rodriguez-Garcia
Summary: Significant efforts have been made to develop sustainable reduction reactions for organic and bioorganic compounds, with the selection of reagents and solvents playing a crucial role. Cp2TiCl/H2O has emerged as a safe, efficient, selective, and low-cost reagent, offering a sustainable alternative for organic compound reduction. This study focuses on describing the intermediates, mechanisms, and representative examples to enhance understanding of reductions facilitated by this system. Future perspectives are discussed, including the use of its analog Cp2TiCl/D2O as a powerful tool for preparing deuterated phenols as internal standards for analyzing bioactive phenols in olive oil.
Article
Engineering, Chemical
Fangchen Ding, Changzhou Zuo, Juan Francisco Garcia-Martin, Yan Ge, Kang Tu, Jing Peng, Hongmei Xiao, Weijie Lan, Leiqing Pan
Summary: Different packaging materials, such as PVC, PE, and EPE, have significant effects on the near infrared (NIR) prediction of mango quality. The spectral interferences resulting from these materials can be reduced using spectral filtering methods. Combining spectral filtering with variable selection methods can further improve the prediction accuracy of mango quality parameters.
JOURNAL OF FOOD ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Eddy Plasquy, Maria C. Florido, Rafael Ruben Sola-Guirado, Jose Maria Garcia Martos, Juan Francisco Garcia Martin
Summary: This study examined how the oxygen consumption and carbon dioxide production of olive fruit in a closed container varied at different temperatures, finding that olives may transition to anaerobic respiration quickly in high temperature environments.
FERMENTATION-BASEL
(2021)