Article
Chemistry, Multidisciplinary
Line Degn Hansen, Martin Ostensen, Bjornar Arstad, Roman Tschentscher, Vincent G. H. Eijsink, Svein J. Horn, Aniko Varnai
Summary: The use of a carbocation scavenger to improve the enzymatic saccharification of steam-exploded softwood brings us closer to a softwood-based biorefinery. The impregnation effect enables complete saccharification of spruce cellulose with lytic polysaccharide monooxygenase (LPMO)-containing Cellic CTec2, but not with an LPMO-poor cellulase cocktail (Celluclast).
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Thermodynamics
Jie Cheng, Sheng-Chun Hu, Zeng-Chao Geng, Ming-Qiang Zhu
Summary: The microwave-assisted alkaline/ethanol pretreatment (MAAP) process was used to treat cotton stalk (CS) and separate high-purity lignin and digestible cellulose-rich residue. The MAAP process produced homogeneous lignin fractions with smaller molecular weights and more phenolic OH groups compared to MWL. The crystallization index of cellulose-rich substrates increased after the MAAP integrated process, and the glucose yield reached the maximum (82.41%) after enzymatic hydrolysis. The MAAP process is a promising method for producing lignin fractions with satisfactory purity and reactivity, promoting the value-added application of cotton stalk in biorefinery.
Article
Agricultural Engineering
Ruoyan Li, Hui Ruan, Daihui Zhang, Chongyang Zhu, Chenhuan Lai, Qiang Yong
Summary: In this study, a combined pretreatment involving autohydrolysis and p-toluenesulfonic acid (p-TsOH) was performed on poplar to coproduce xylooligosaccharides (XOSs) and monosaccharides. The enzymatic digestibilities of the combined pretreated substrates were found to be extremely poor, but the addition of Tween 80 successfully improved the enzymatic hydrolysis.
BIORESOURCE TECHNOLOGY
(2024)
Review
Environmental Sciences
Tumpa R. Sarker, Falguni Pattnaik, Sonil Nanda, Ajay K. Dalai, Venkatesh Meda, Satyanarayan Naik
Summary: The pretreatment of lignocellulosic biomass using hydrothermal methods like steam explosion and subcritical water hydrolysis is eco-friendly and cost-effective. These methods have the potential to efficiently convert biomass into biofuels and value-added chemicals. Further research is needed to fully understand the mechanisms and operating conditions of these promising technologies.
Article
Green & Sustainable Science & Technology
Chunxiao Gong, Sune Tjalfe Thomsen, Xianzhi Meng, Yunqiao Pu, Maria Puig-Arnavat, Nathan Bryant, Samarthya Bhagia, Claus Felby, Arthur J. Ragauskas, Lisbeth Garbrecht Thygesen
Summary: Industrial pelleting positively affects sugar yield in both acid and alkali pretreatments, while laboratory pelleting affects sugar yield differently based on pretreatment types and biomass species. Pelleting disrupts biomass cell wall structure and influences the stability of hemicellulose and beta-O-4' linkages in lignin.
Article
Engineering, Environmental
Cheng-Ye Ma, Ling-Hua Xu, Qian Sun, Xiao-Jun Shen, Jia-Long Wen, Tong-Qi Yuan
Summary: In this study, a tailored one-pot lignocellulose fractionation method was developed using ultrafast and recyclable microwave-assisted ternary deep eutectic solvent (DES) pretreatment. This method significantly reduced the recalcitrance of natural biomass, promoted the enzymatic saccharification of cellulose, and produced lignin nanoparticles. The delignification process during DES pretreatment was visually monitored. The glucose yield of the pretreated poplar reached 95.4%, which was 5.8 times higher than the control. The regenerated DES lignin exhibited nanosized lignin with controllable size and excellent antioxidant activity.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Hongqiong Zhang, Rui Zhang, Yunong Song, Xinying Miu, Quanguo Zhang, Jingbo Qu, Yong Sun
Summary: This study investigated the effects of using urea combined with steam explosion on the enzymatic hydrolysis and ethanol production of corn stover. The results showed that optimal conditions for ethanol production were 4.87% urea addition and 1.22 MPa steam pressure. The addition of urea and steam explosion significantly increased the reducing sugar yield and degradation rates of cellulose, hemicellulose, and lignin.
BIORESOURCE TECHNOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Lan Wang, Yaoyao Zhou, Yang Liu, Hongzhang Chen
Summary: This study investigated the feasibility of N-2 periodic pulsation to improve ethanol productivity in solid state fermentation. Results showed that N-2 periodic pulsation significantly increased ethanol productivity, reduced CO2 concentration, and enhanced metabolic flux towards ethanol production.
Article
Biochemistry & Molecular Biology
Xuehe Ding, Lihua Yan, Chang Guo, Dianzeng Jia, Nannan Guo, Luxiang Wang
Summary: The co-pyrolysis of coal and cotton stalk was studied using Qiqunahu (QQH) coal, cotton stalk, cellulose, and lignin as raw materials. Online thermogravimetric mass spectrometry (TG-MS) was used to analyze gas release characteristics during co-pyrolysis. The results show that cotton stalk enhances the reactivity of the blends and promotes the formation of effective gas. Cellulose promotes the generation of H-2 and CO2, while lignin promotes the production of CH4 and CO2. Cellulose and lignin also inhibit the precipitation of small molecular weight hydrocarbon gases during co-pyrolysis.
Article
Chemistry, Physical
Zhen Dong, Na Li, Teye Chu, Jiangxin Ding, Junxiong Zhang, Aixue Dong
Summary: This study presents a new method to extract high-quality lignocellulosic fibers from cotton stalks using glycerol solvent and microwave-assisted heating. The extracted fibers are both fine and have a high breakage strength, with a clean surface, making them suitable for reinforcing applications.
Article
Biotechnology & Applied Microbiology
Gianluca Cavalaglio, Mattia Gelosia, Tommaso Giannoni, Ramoon Barros Lovate Temporim, Andrea Nicolini, Franco Cotana, Alessandro Bertini
Summary: The study focused on the acid-catalyzed steam explosion treatment of cardoon lignocellulosic stalks, identifying optimal conditions for maximizing monosaccharides yield. Through process optimization, high monosaccharides production and low inhibitor formation were achieved in the hydrolysis step. Additionally, environmental impacts of the production process were determined using a life cycle assessment approach.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Lei Zhong, Chao Wang, Guihua Yang, Jiachuan Chen, Feng Xu, Chang Geun Yoo, Gaojin Lyu
Summary: A microwave-assisted guanidine hydrochloride deep eutectic solvent was developed for the pretreatment of castor stalk, showing high efficiency in delignification and enzymatic saccharification, as well as excellent lignin recovery. The guanidine hydrochloride-based DES demonstrated good recyclability and high cellulose hydrolysis rates, making it a promising pretreatment solvent for future biorefinery strategies.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ming Li, Beihai He, Yiyi Chen, Lihong Zhao
Summary: Nanocelluloses isolated from cotton stalks through sulfuric acid hydrolysis exhibit decreased particle size, leading to changes in physicochemical properties including morphology, hydrogen bond breakage and recombination, thermal performance, and crystal arrangement model.
Review
Energy & Fuels
Praveen Kumar Keshav, Chandrashekhar Banoth, Srinivas Naik Kethavath, Bhima Bhukya
Summary: This article discusses the use of cotton stalk as a feedstock for lignocellulosic ethanol production. It explores the various pretreatment, saccharification, and fermentation methods and also identifies the major barriers and future perspectives in bioethanol fermentation strategies.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Agricultural Engineering
Wenjie Sui, Xiaoqian Liu, Hao Sun, Chao Li, Ashak Mahmud Parvez, Guanhua Wang
Summary: This study introduces a novel combined pretreatment approach involving steam explosion and GVL/water delignification to improve the enzymatic saccharification efficiency of corn stalk. The method effectively removes lignin and enhances glucan content in the solid material, leading to significantly increased glucose concentration during high-solid loading enzymatic hydrolysis with relatively low cellulase addition. The combined pretreatment shows promise for green lignocellulosic biorefinery by fractionating corn stalk and producing a glucan-enriched solid with enhanced enzymatic digestibility.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
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)