Article
Multidisciplinary Sciences
Zhiquan Wang, Suqing Wu, Chunzhen Fan, Xiangyong Zheng, Wei Zhang, Deyi Wu, Xinze Wang, Hainan Kong
Summary: The study found that the optimal NaOH pre-treatment conditions for enzymatic hydrolysis of wheat straw to enhance reducing sugar yield were NaOH concentration of 1.0%, solid content of 5.0%, and pre-treatment time of 60 minutes. Optimization of parameters such as solid content, enzyme loading, temperature, pH, and hydrolysis time during enzymatic hydrolysis can significantly increase the yield of reducing sugars.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Jianhong Sun, Yuanfang Deng, Shaohua Li, Wenyong Xu, Guoquan Liu
Summary: This research investigated the enhanced efficiency of enzymatic hydrolysis of wheat straw through freeze-thaw pretreatment and analyzed the changes in physicochemical structure after pretreatment. The study found that cellulose and hemicellulose hydrolysis efficiency was improved, with hemicellulose being more susceptible to pretreatment. The highest hydrolysis efficiency for cellulose and hemicellulose was 57.06% and 70.66%, respectively, achieved at -80℃ for 24 hours and -10℃ for 24 hours, which were 2.23 and 3.13 times higher than the control levels, respectively. The study also observed cracks and holes in the pretreated samples, indicating structural changes. Fourier transform infrared spectroscopy and X-ray diffraction analysis revealed disruptions in the crystalline and amorphous regions and hydrogen bonds. This study provides a physical pretreatment method for enhancing the enzymatic hydrolysis efficiency of wheat straw.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agronomy
Dimitrios Ilanidis, Stefan Stagge, Leif J. Jonsson, Carlos Martin
Summary: Biochemical conversion of wheat straw was studied using hydrothermal pretreatment, enzymatic saccharification, and microbial fermentation. Different pretreatment conditions had significant effects on chemical composition, enzymatic digestibility, carbohydrate composition, inhibitory byproducts, furfural, and fermentability. Xylose concentration in pretreatment liquids increased with temperature up to 190 degrees C and then decreased.
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
Green & Sustainable Science & Technology
Emanuela Calcio Gaudino, Giorgio Grillo, Silvia Tabasso, Livio Stevanato, Giancarlo Cravotto, Kaisa Marjamaa, Ville Pihlajaniemi, Anu Koivula, Nina Aro, Jaana Uusitalo, Jarmo Ropponen, Lauri Kuutti, Pauliina Kivinen, Heimo Kanerva, Alexander Arshanitsa, Lilija Jashina, Vilhelmine Jurkjane, Anna Andersone, Thomas Dreyer, Gerhard Schories
Summary: This paper reports the dominant physical effects of ultrasound (US) pretreatment on improving delignification of wheat straw. The study demonstrates that ultrasound pretreatment can effectively increase the yield of soluble sugars by making the cellulose more susceptible to enzymatic hydrolysis. The results show that ultrasound pretreatment has advantages over steam explosion pretreatment in terms of environmental impact and cost-benefit analysis.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Biotechnology & Applied Microbiology
Zhe Ji, Yue Wu, Xinting Li, Yateng Wang, Zhe Ling, Yao Meng, Peng Lu, Fushan Chen
Summary: This study proposed a novel, low-cost, and environmentally friendly electrogenerated alkaline hydrogen peroxide (EAHP) pretreatment method that can simultaneously produce H2O2 and pretreat biomass. The enzymatic hydrolysis of cellulose and xylan in the pretreated lignocellulosic biomass was significantly enhanced.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Wei Tang, Xinxing Wu, Caoxing Huang, Zhe Ling, Chenhuan Lai, Qiang Yong
Summary: Pretreatment with FeCl3 and AlCl3 can significantly increase enzymatic hydrolysis efficiency of waste wheat straw, mainly by increasing xylan removal. Additionally, metallic chlorides pretreatment can also reduce the surface charge, hydrophobicity, and protein adsorption capacity of lignin from waste wheat straw.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Xiao-le Liu, Zhen Fang, Xiao-fei Tian, Zheng-diao Miao
Summary: In this study, wheat straw was pretreated with a combination of ball milling (BM) and NaAlO2 particles (NaAlO2-BM) for efficient enzymatic hydrolysis. The results showed that NaAlO2-BM pretreatment significantly reduced particle size to tissue scale within 10 minutes, with 0.5 times lower energy consumption compared to BM pretreatment. The 20-minute NaAlO2-BM pretreatment achieved a glucose yield of 95.4% and the highest energy efficiency of 0.121 kg glucose/kWh, increasing by 1.1 times than BM pretreatment. Energy consumption was positively correlated with cellulose content and negatively correlated with particle size, cellulose crystallinity, and energy efficiency. The combination of BM and NaAlO2 particles proved to be a promising pretreatment approach for glucose production and improving energy efficiency during lignocellulosic hydrolysis.
Review
Chemistry, Multidisciplinary
Jinyu Tan, Yan Li, Xiang Tan, Hongguo Wu, Hu Li, Song Yang
Summary: Straw biomass is a cost-effective and renewable feedstock for producing valuable chemicals and biofuels. Suitable pretreatment is essential for efficient production of fermentable sugars. Various pretreatment methods can effectively separate components and improve accessibility and susceptibility.
FRONTIERS IN CHEMISTRY
(2021)
Article
Biotechnology & Applied Microbiology
Hui Zhang, Junhui Wu
Summary: This study optimized the pretreatment and enzymatic hydrolysis of wheat straw using alkaline hydrogen peroxide (AHP). The results showed that optimal sugar yields and cellulose, hemicellulose removal were achieved under specific conditions of hydrogen peroxide concentration, temperature, time, enzyme loading, and biomass loading.
FERMENTATION-BASEL
(2023)
Article
Chemistry, Physical
Jinling Cai, Yu Wang, Jie Liu, Xinzhi Zhang, Fengmei Li
Summary: This study uses NaOH/urea and electrohydrolysis pretreatment to enhance the disruption of rice straw and the production of biofuels and chemicals. The pretreatment methods effectively disrupt the lignin structure and increase the cellulose crystallinity of rice straw. The hydrolysis of the pretreated rice straw produces a higher amount of reducing sugars and an increased yield of hydrogen.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Biotechnology & Applied Microbiology
Yulian Cao, Haifeng Liu, Junqiang Shan, Baijun Sun, Yanjun Chen, Lei Ji, Xingxiang Ji, Jian Wang, Chenjie Zhu, Hanjie Ying
Summary: In this study, wheat straw was fractionated into carbohydrates (cellulose and hemicellulose) by ammonia-mechanical pretreatment for l-lactic acid fermentation. The delignification rate was over 60% under optimal conditions. After enzymatic hydrolysis, the maximum conversions of cellulose and hemicellulose were 92.5% and 83.4% respectively, based on the pretreatment residue. The wheat straw hydrolysate was used to produce l-lactic acid with Thermoanaerobacter sp. DH-217G, achieving a yield of 88.6% and an optical purity of 99.2%. Ammonia-mechanical pretreatment is an economical method for producing fermentable monosaccharides, with potential for further downstream high-value applications.
FERMENTATION-BASEL
(2023)
Article
Energy & Fuels
Jia-Ming Guo, Yu-Tao Wang, Jing-Rong Cheng, Ming-Jun Zhu
Summary: In this study, a simple and effective SPB pretreatment method was proposed to enhance the enzymatic hydrolysis efficiency of rice straw. The pretreated rice straw showed high enzymatic hydrolysis efficiency and bioethanol production through simultaneous saccharification and co-fermentation.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Huanhuan Zhang, Yuanyuan Wang, Ruinan Yang, Zhenli Yan, Zigao Zhao, Chaojun Du, Yujie Chen, Wei Chen, Chun Chang
Summary: This study compared three mild pretreatment methods (formic acid pretreatment, sodium chlorite pretreatment, and alkaline hydrogen peroxide pretreatment) for wheat straw. The results showed that alkaline hydrogen peroxide pretreatment had better enzyme accessibility and higher enzymatic hydrolysis yield, and lignin can be separated from the liquid, improving the process's economics. Furthermore, response surface methodology was used to optimize the enzyme and additive conditions, achieving a maximum enzymatic hydrolysis yield of 94.15%. Fed-batch experiments with high-solid loadings achieved an enzymatic hydrolysis yield of 86.05%. These results contribute to improving the economic feasibility of wheat straw pretreatment and enzymatic hydrolysis process.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Jungang Jiang, Jiale Fu, Ni An, Yifan Zhang, Xue Chen, Lei Wang
Summary: This study proposes a rapid and effective pretreatment method using molten oxalic acid dihydrate (OAD) to enhance enzymatic saccharification for biohydrogen production. The pretreatment achieves high cellulose retention, hemicellulose removal, and delignification within a short time, resulting in high enzymolysis conversion rate and fermentative hydrogen yield.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
G. Grasa, I. Martinez, R. Murillo
Summary: Gasification kinetics of six chars from residual origin were studied under relatively low temperature, low CO2, and high H2O partial pressures. The Random Pore Model (RPM) showed the best fit to experimental results, but the selection of the reaction model depended on the ash composition, specifically the presence of alkali and alkaline earth metals. Chars with ash content higher than 30% wt. were modeled with the RPM model, while chars with the highest K/Si ratio required modified versions of the RPM to accurately predict reaction rates. Textural properties played a key role in determining reaction parameters, such as the pre-exponential factor and activation energy, for chars with similar ash content and composition.
BIOMASS & BIOENERGY
(2024)
Review
Agricultural Engineering
V. Godvin Sharmila, Surya Prakash Shanmugavel, J. Rajesh Banu
Summary: Proper treatment and disposal of biomass waste is crucial to prevent environmental deposition and its negative impacts. Biofuel has emerged as a potential alternative to fossil fuels, reducing carbon emissions and meeting global energy demands. This review examines different biomass waste conversion techniques and explores the production of biofuels with zero carbon emissions. Research on anaerobic treatment, metabolic engineering, and artificial intelligence has been conducted to enhance biofuel production efficiency.
BIOMASS & BIOENERGY
(2024)
Review
Agricultural Engineering
Selvakumar Periyasamy, Adane Asefa Adego, P. Senthil Kumar, G. G. Desta, T. Zelalem, V. Karthik, J. Beula Isabel, Mani Jayakumar, Venkatesa Prabhu Sundramurthy, Gayathri Rangasamy
Summary: Valorizing agricultural waste into valuable products is crucial for environmental protection and bioeconomy advancement. Preprocessing of agricultural waste is a critical step to convert free carbohydrate molecules for final conversion, and factors such as biomass nature, feed loading, pH, temperature, and time influence the process. This review provides comprehensive information on agricultural waste availability, preprocessing techniques, and factors influencing performance.
BIOMASS & BIOENERGY
(2024)
Article
Agricultural Engineering
Aqueel Ahmad, Ashok Kumar Yadav, Achhaibar Singh, Dinesh Kumar Singh
Summary: The study focuses on predicting and optimizing the yield of biogas production in an anaerobic digester using co-digestion. Experimental data was used to develop a machine learning-based prognostic model, and the Response Surface Methodology (RSM) was employed to optimize the parameters. The results demonstrate that RSM coupled with machine learning is an effective technique for modeling, predicting, and optimizing biogas production yield.
BIOMASS & BIOENERGY
(2024)
Article
Agricultural Engineering
Yijing Zhong, Wenxiang Zhai, Xinli Wei
Summary: This paper studies the thermal stability and decomposition of cork materials with and without silica aerogel filler. The results show that the decomposition is inhibited and the pyrolysis is significantly reduced with the addition of silica aerogel. This finding suggests that silica aerogel-infused cork may be a promising raw material for biofuel production with reduced environmental pollution.
BIOMASS & BIOENERGY
(2024)