Article
Engineering, Environmental
Dendera Munguia-Aguilar, Hector A. Ruiz, Elias Razo-Flores, Cesar Nieto-Delgado, Edith Cadena-Chamorro, Felipe Alatriste-Mondragon
Summary: The efficiency of enzymatic saccharification of lignocellulosic biomass can be improved by a sequential process of hydrothermal pretreatment followed by enzymatic hydrolysis, resulting in higher release of sugars and methane production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Agricultural Engineering
Jorge Carlos Avila-Gaxiola, Evangelina Avila-Gaxiola
Summary: This study evaluates the feasibility of alcoholic fermentation using S. cerevisiae yeast in enzymatically treated Agave tequilana leaves, and the results demonstrate the potential and efficiency of ethanol production, with applications in industry and biotechnology.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Review
Chemistry, Applied
Chaozhong Xu, Shanshan Tong, Liqun Sun, Xiaoli Gu
Summary: Cellulase-mediated lignocellulosic biorefinery is crucial for producing high-value biofuels and chemicals, and immobilization of cellulase enzymes has greatly improved the efficiency, stability, and reusability of the process. This comprehensive review analyzes the principles and various approaches of cellulase immobilization, including physical adsorption, covalent binding, entrapment, and cross-linking. It also explores different carrier materials and emerging techniques such as multi-enzyme co-immobilization and 3D printing carriers, while addressing obstacles like diffusion limitations and loss of cellulase activity.
CARBOHYDRATE POLYMERS
(2023)
Article
Energy & Fuels
Natalia Kordala, Malgorzata Lewandowska, Wlodzimierz Bednarski
Summary: The pretreatment of lignocellulosic material leads to the synthesis of compounds that inhibit the metabolic activity of microorganisms, hindering the bioconversion of lignocellulosic hydrolysates. Identifying these inhibitors and selecting the optimal detoxication method are crucial for improving fermentation efficiency.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Agricultural Engineering
Reeta Rani Singhania, Anil Kumar Patel, Anusuiya Singh, Dibyajyoti Haldar, Shveta Soam, Chiu-Wen Chen, Mei -Ling Tsai, Cheng-Di Dong
Summary: Consolidated bioprocessing (CBP) is a production method that directly produces value-added compounds from biomass, reducing inputs and chemical use. However, commercialization has been limited due to low conversion efficiency. The key challenge is developing a cost-effective CBP process with bifunctional catalysts.
BIORESOURCE TECHNOLOGY
(2022)
Review
Energy & Fuels
Nevena Ilic, Marija Milic, Suncica Beluhan, Suzana Dimitrijevic-Brankovic
Summary: Cellulases have attracted worldwide attention as they can degrade cellulose in lignocellulosic biomass and transform it into bioethanol. The enzymatic hydrolysis of cellulose by cellulases is a crucial step in biofuel production due to the complex structure of lignocellulose. The demand for cellulases is rapidly growing due to their unique ability to hydrolyze the recalcitrant nature of lignocellulosic biomass. Continuous efforts are being made to develop cellulase mixtures/cocktails with improved performance and isolate new microorganisms as potential producers of cellulases for biofuel production. This review provides insight into current research on improving microbial cellulase production and the outlook for the cellulase market in industrial bioethanol production.
Article
Chemistry, Multidisciplinary
Vivian Pascal Willers, Barbara Beer, Volker Sieber
Summary: Facing increasing mobility, energy demand, and the need to mitigate climate change, developing sustainable and eco-friendly alternatives to fossil fuels is a crucial task for humanity. Biofuels and synthetic fuels show great potential as they can be integrated into existing processes, with synthetic fuels from CO2 and renewable energies being considered the next big step towards a sustainable and ecological future. In our study, we focus on the sustainable production of ethanol and isobutanol, two common biofuels, using methanol and xylose derived from CO2 and lignocellulosic waste streams. Through enzyme and reaction optimization, we successfully produced ethanol or isobutanol from xylose and methanol. Our research opens up the possibility of hybrid production of biofuels and chemicals from CO2 and lignocellulosic waste streams, providing an alternative to conventional routes that rely solely on CO2 or sugars.
Article
Energy & Fuels
Waseem Ayoub Malik, Haris M. Khan, Saleem Javed
Summary: Cellulolytic enzymes produced by the bacterial strain Bacillus subtilis isolated from cow dung were optimized using response surface methodology and one-variable-at-a-time design, resulting in a threefold increase in cellulase production. The optimization process involved the significant contributions of galactose and sodium nitrate to enhance cellulase production.
BIOENERGY RESEARCH
(2022)
Article
Agricultural Engineering
Neha Srivastava, Rajeev Singh, Manish Srivastava, Akbar Mohammad, Steve Harakeh, Ravindra Pratap Singh, Dan Bahadur Pal, Shafiul Haque, Hossam H. Tayeb, Mohammed Moulay, Vijai Kumar Gupta
Summary: Biomass to biofuels production technology is a sustainable strategy for renewable energy resources. Pretreatment is a key step to improve cellulose availability and digestibility. Existing pretreatment technologies face challenges such as energy consumption, cost, removal of lignin, inhibitors production, and environmental pollution. The use of nanomaterials as nanocatalysts in pretreatment processes can overcome these limitations and improve biofuels production.
BIORESOURCE TECHNOLOGY
(2023)
Review
Agricultural Engineering
Zhengxin Wang, Xinggan Peng, Ao Xia, Akeel A. Shah, Yun Huang, Xianqing Zhu, Xun Zhu, Qiang Liao
Summary: The development and application of bioenergy and biofuels conversion technology are crucial for producing renewable and sustainable energy sources in the future. However, due to the complexity of bioenergy systems and human limitations in understanding, machine learning provides new opportunities. The latest advances in machine learning assisted bioenergy technology show great potential in driving the development of a new generation of bioenergy and biofuels conversion technologies in the future.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Jantima Arnthong, Piyada Bussadee, Apisan Phienluphon, Pacharawan Deenarn, Kan Tulsook, Sa-ngapong Plupjeen, Chatuphon Siamphan, Chakrit Tachaapaikoon, Verawat Champreda, Surisa Suwannarangsee
Summary: This study investigates the improvement of cellulase activity and ethanol production by testing different genes involved in glycosylphosphatidylinositol (GPI) biosynthesis and remodeling. The overexpression of LAS21 gene is found to significantly improve beta-glucosidase activity. The engineered strain shows enhanced ethanol yield through further optimization of the bioprocess parameters. This study provides a promising approach to improve the economic viability of second-generation ethanol production.
FERMENTATION-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Knawang Chhunji Sherpa, Debajyoti Kundu, Subhodeep Banerjee, Makarand Madhao Ghangrekar, Rintu Banerjee
Summary: This study explores the potential of using sugarcane tops as a feedstock for ethanol production and conducts experiments using different fermentation approaches. The results show that simultaneous saccharification and fermentation (SSF) is more efficient than separate fermentation, and partially consolidated bioprocessing (PCBP) further improves fermentation efficiency.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Microbiology
Bo Zheng, Shengzhu Yu, Zhenya Chen, Yi-Xin Huo
Summary: This review analyzes recent trends and new strategies for bioenergy production from pretreated lignocellulose, as well as challenges in developing low-cost advanced processing technologies and addressing the global energy crisis and climate change.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Agricultural Engineering
Jie Qiao, Haiyang Cui, Minghui Wang, Xianshen Fu, Xinyue Wang, Xiujuan Li, He Huang
Summary: This article summarizes four promising routes for assembling new industrial plants for cellulose-based fuels and chemicals, and discusses the challenges and prospects in this field.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Ajay Kumar Pandey, Mohit Kumar, Sonam Kumari, Naseem A. Gaur
Summary: In this study, paddy straw hydrolysate (PSH) was integrated with molasses as a diluent for ethanol production using a robust Saccharomyces cerevisiae NGY10 strain. The integration of PSH as a diluent not only increased ethanol yield and productivities but also saved water consumption and operational costs, and could be accommodated in existing sugar mill infrastructures.