Article
Green & Sustainable Science & Technology
Khanitta Nunui, Piyarat Boonsawang, Sumate Chaiprapat, Boonya Charnnok
Summary: This study developed a method of pretreatment using acid wastewater to enhance the conversion of rubberwood waste into fermentable sugar and ethanol, which showed significant advantages in improving fermentable sugar concentration and yield, as well as reducing water utilization, wastewater generation, and energy consumption in ethanol production. The organosolv pretreatment demonstrated the best performance in enhancing the conversion efficiency of rubberwood waste, indicating its potential for guiding lignocellulosic ethanol production in collaboration with latex factories.
Article
Agricultural Engineering
Meena Sankar, Reshma M. Mathew, Anoop Puthiyamadam, Athiraraj Sreeja-Raju, Meera Christopher, Digambar Vitthal Gokhale, Rajeev K. Sukumaran
Summary: Secretome analyses showed that the types of proteins secreted by SSF and SmF enzymes were similar, but SSF had high abundance of specific beta glucosidases, lytic polysaccharide monooxygenases and hemicellulolytic enzymes, resulting in efficient initiation, low cellobiose accumulation and high initial reaction rates.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Anita Singh, Somvir Bajar, Arti Devi, Narsi R. Bishnoi
Summary: The study investigated the optimal conditions for enhancing cellulase and xylanase production by Aspergillus flavus through solid-state fermentation, finding that microwave alkali-pretreated rice straw is the most suitable carbon source. Under the optimal conditions, significant increases in enzyme activities were observed, leading to cost reduction in biofuel production and utilization of low-cost lignocellulosic biomass for enzyme production, contributing to solid waste management and reducing environmental pollution.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Energy & Fuels
Tanate Tongbuekeaw, Ruengwit Sawangkeaw, Sumate Chaiprapat, Boonya Charnnok
Summary: The study investigated the effects of hydrothermal and ethanol organosolv pretreatments on methane production from rubber wood waste, finding that ethanol organosolv pretreatment could enhance methane yield.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Environmental Sciences
Ali Soltaninejad, Mohammadhadi Jazini, Keikhosro Karimi
Summary: In this study, the valorization of potato peel wastes (PPW) for bioethanol and biogas production was investigated. Through processes such as ethanol solvent pretreatment and enzymatic hydrolysis, the PPW was successfully converted into energy.
Article
Polymer Science
Johannes Adamcyk, Stefan Beisl, Samaneh Amini, Thomas Jung, Florian Zikeli, Jalel Labidi, Anton Friedl
Summary: Despite major efforts in recent years, lignin as an abundant biopolymer is still underutilized in material applications. Production of lignin nanoparticles with improved properties through a high specific surface area enables easier applicability and higher value applications. This work provides detailed insight into the precipitation process of lignin nanoparticles, enabling better understanding and optimization with respect to different raw materials and pretreatment severities.
Article
Thermodynamics
Farinaz Ebrahimian, Joeri F. M. Denayer, Keikhosro Karimi
Summary: This study evaluated the cocultivation of Clostridium acetobutylicum and Mucor indicus, which showed the potential to generate high yields of acetone-butanol-ethanol (ABE) and hydrogen from the organic fraction of municipal solid waste (OFMSW). The symbiosis between the fungus and bacteria led to high ethanol, butanol, and hydrogen yields without the need for starch hydrolysis. The cocultivation showed higher energy generation and economic potential compared to mono cultivation.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Energy & Fuels
Zhao Yunqing, Xiu Han, Jiang Hui, Qiu Weihua
Summary: This article investigates the effects of microwave pretreatment on the enzymatic saccharification and ethanol fermentation of kitchen waste (KW). Optimal pretreatment conditions were determined, and it was found that the enzymatic hydrolysate of microwave-pretreated KW had a higher ethanol yield compared to un-pretreated KW. Microscopic observation revealed that microwave pretreatment resulted in rough and porous structures, enhancing the bioavailability and fermentability of KW.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Agricultural Engineering
Jiajie Zhang, Jun Xie, Hongdan Zhang
Summary: The NaOH catalytic ethanol pretreatment of sugarcane bagasse improved glucose yield by assisting delignification and preserving cellulose and hemicellulose. Higher temperature and longer time resulted in higher glucose yield, while the addition of Tween 80 significantly reduced enzyme usage and enzymolysis time while maintaining comparable glucose yield. This study provided an economically feasible method for generating glucose followed by fermentation and conversion to platform chemicals.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Jin Sun, Yasunori Kosaki, Koji Kawamura, Nobuhisa Watanabe
Summary: This study demonstrates the performance of ethanol fermentation pretreatment (EP) for food waste in achieving high-load anaerobic digestion operation using an anaerobic membrane bioreactor (AnMBR). By increasing the organic loading rate (OLR) and maintaining a low propionic acid accumulation, the methane content in biogas was significantly improved. Additionally, the study showed that primary methanogens were tolerant to ammonia inhibition, leading to improved buffering capacity at high load, and identified the abundance of hydrogenotrophic methanogens in AnMBR through 16S rRNA sequence analysis. The results suggest that the EP contributes to creating a virtuous cycle by maintaining a lower hydrogen partial pressure and achieving ultra-high load in the system.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Agricultural Engineering
Cleitiane da Costa Nogueira, Carlos Eduardo de Araujo Padilha, Everaldo Silvino dos Santos
Summary: Efforts to improve lignocellulosic pretreatments have been costly in second-generation ethanol production, but high-concentration PEG shows promise in increasing ethanol production without the need for additional chemical or physicochemical pretreatments. Operational conditions in a study using high PEG concentrations and green coconut fiber as substrates showed increased ethanol production, with the addition of salts, yeast extract, or peptone further enhancing ethanol yield.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Agricultural Engineering
Xinyu Huang, Meishan Fan, Jun Xie, Chunmei Zhong, Hongdan Zhang
Summary: This study proposed AlCl3-catalyzed organosolv pretreatment with different temperatures to disrupt the recalcitrant structure of poplar, improving ethanol conversion. The increment of pretreatment temperature increased the ethanol concentration. The comparison between batch and fed-batch SSF showed different ethanol concentrations and yields under different solid loading conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Applied
Gabriela Bonan Hermsdorff, Estephanie Laura Nottar Escobar, Thiago Alessandre da Silva, Arion Zandona Filho, Marcos Lucio Corazza, Luiz Pereira Ramos
Summary: This study utilized organic acid catalysts and supercritical CO(2)-assisted organosolv pretreatment to efficiently remove lignin and retain glucose from sugarcane bagasse. The optimized conditions achieved high delignification and glucan retention rates. Additionally, it was found that organic acid esterification was a limiting factor at high ethanol titer.
CARBOHYDRATE POLYMERS
(2023)
Review
Environmental Sciences
Neha Srivastava, Manish Srivastava, Alaa Alhazmi, Tahreem Kausar, Shafiul Haque, Rajeev Singh, Pramod W. Ramteke, Pradeep Kumar Mishra, Maria Tuohy, Maja Leitgeb, Vijai Kumar Gupta
Summary: This review discusses recent advances in fungal cellulase production using fruit wastes as a potential substrate, and explores the availability, generation, and processing data of fruit wastes as well as their potential applications in cellulase enzyme production.
ENVIRONMENTAL POLLUTION
(2021)
Article
Agricultural Engineering
Qizhen Yang, Wei Tang, Lei Li, Menghan Huang, Cuiluan Ma, Yu-Cai He
Summary: Hydrothermal pretreatment is an effective method to improve the saccharification of lignocellulose. In this study, an efficient hydrothermal pretreatment of sunflower straw was conducted, resulting in the removal of 58.8% xylan and 33.5% lignin at a treatment temperature of 180 degrees C for 120 min and a solid-to-liquid ratio of 1:15. Various characterizations confirmed that hydrothermal pretreatment altered the surface structure and increased the accessibility to cellulase. The enzymatic saccharification of the treated sunflower straw achieved a high yield of reducing sugar and glucose and also produced xylo-oligosaccharide in the filtrate.
BIORESOURCE TECHNOLOGY
(2023)
