Article
Agricultural Engineering
Xiaodong Chu, Qiushuang Cheng, Yonghua Xu, Lina Luo, Ming Wang, Guoxiang Zheng, Hongqiong Zhang, Weiming Yi, Xiaofeng Liu, Yongming Sun, Yong Sun
Summary: The ultrasonic-aerobic hydrolysis pretreatment of corn straw can significantly increase methane production, which is of great significance to biogas engineering.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Xinxin Li, Xusheng Yan, Meiying Ye, Chuang Song, Jingsi Gao, Jia Zhu, Yanping Liu
Summary: In this study, NaOH-cellulase pretreatment was used to effectively improve the anaerobic digestion (AD) of corn straw. The optimal conditions for NaOH-cellulase pretreatment were found to be 6.0% NaOH concentration and 0.10 g.g(-1) dry matter cellulase. NaOH-cellulase pretreatment significantly increased methane production and straw degradation rate.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Xinyuan Zhang, Yiqin Wang, Jie Lu, Miaomiao Liu, Wanting Tan, Yi Cheng, Yehan Tao, Jian Du, Haisong Wang
Summary: This paper used five different types of biosurfactants to enhance the saccharification efficiency in the enzymatic hydrolysis process. The addition of sophorolipid increased the enzymatic hydrolysis efficiency by 30.65%, while the combination of sophorolipid and tea saponin further increased the efficiency to 99.56%. These biosurfactants acted synergistically to inhibit enzymatic inactivation and non-productive adsorption of lignin. This study proposes an effective method to improve enzymatic hydrolysis efficiency and reduce enzyme dosage by utilizing biosurfactants.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Zhong Xie, Hua Zou, Yi Zheng, Shan-Fei Fu
Summary: Solid-state urea pretreatment was developed to remove lignin, disrupt the dense structure, and regulate the C/N ratio of corn straw, resulting in increased methane production and higher nutrient content in the digestate.
Review
Agricultural Engineering
David Alexander Mitchell, Isabelle Moreira, Nadia Krieger
Summary: Stochastic models have the potential to be important tools in describing the complex network of reactions involved in enzymatic hydrolysis of polysaccharides, but many current models lack biologically meaningful parameters. Only a few models utilize classical enzyme kinetics parameters, and recent research on stochastic models for cellulose hydrolysis provides valuable insights into the molecular-level phenomenon limiting hydrolysis rates. Further improvements are necessary for stochastic models of enzymatic polysaccharide hydrolysis to become widely used tools for guiding process development.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Luyao Yang, Xiujin Li, Hairong Yuan, Beibei Yan, Gaixiu Yang, Yao Lu, Juan Li, Xiaoyu Zuo
Summary: In this study, a new pretreatment method for corn straw (CS) was proposed by combining freezing-thawing (FT) method with KOH alkaline pretreatment technology to enhance anaerobic digestion (AD) performance. The results showed that the -20 degrees C + 20 degrees C + KOH pretreatment group had the best results with significantly higher biomethane production and VS removal rate compared to untreated CS. The combination of FT and KOH alkaline pretreatment is a promising method that can greatly improve the biodegradability and methane production of CS.
Article
Green & Sustainable Science & Technology
Qihang Shu, Hongkuan Cheng, Xiaxia Chen, Jie Wang, Zunqing Du, Jun Hong, Zheng Zheng, Xingzhang Luo
Summary: In this study, the effects of different concentrations of enrofloxacin (ENR) on anaerobic digestion using fresh pig manure and corn straw powder as substrates were investigated. A relatively low concentration of ENR increased methane production, while higher concentrations of ENR decreased methane production and led to the accumulation of volatile fatty acids. Furthermore, the abundance and diversity of anaerobic microorganisms were also affected by the concentration of ENR.
Article
Agricultural Engineering
Xinning Huang, Xinying Miao, Xiaodong Chu, Lina Luo, Hongqiong Zhang, Yong Sun
Summary: This study investigated the effects of biochar addition on internal environmental changes and gas production characteristics in a semi-continuous anaerobic co-digestion (AcoD) reactor with biogas slurry recirculation. The results showed that biochar addition enhanced the degradation and metabolic pathways of acetate and propionate, resulting in decreased concentrations of volatile fatty acids, total ammonia, and chemical oxygen demand. The addition of biochar also improved the stability of the system and increased the abundance of certain bacterial groups and methanogenic pathways. This study provides scientific and technical support for the application of biochar in improving the stability of biogas projects.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Huiban He, Ziyu Wang, Jing Yan, Weiwei Wang, Jinbo Zhu, Jingkang Chen, Daicheng Liu, Hongliang Wang, Zongjun Cui, Xufeng Yuan
Summary: This study evaluated the effect of conventional and interval temperatures on methanogenesis performance and microbial regulation in continuous anaerobic digestion (AD) of wilted corn straw. The results showed that interval temperature substantially enhanced methane yield and Methanosarcina played a crucial role in methane production at interval temperature. Furthermore, a high abundance of essential genes involved in methane metabolism was found in the interval temperature digester.
Article
Thermodynamics
Hao Sha, Bo Zhao, Yuyi Yang, Yanhui Zhang, Pengfei Zheng, Shengxian Cao, Qing Wang, Gong Wang
Summary: The combination of magnetized cellulase and Ni-graphite coated materials significantly increased CH4 yield and influenced microbial community composition when treating corn stover. Carbon balance calculations showed that the combination treatment resulted in higher energy conversion efficiency.
Article
Green & Sustainable Science & Technology
Youzhou Jiao, Huizan Xue, Chao He, Zigang Wang, Xiaoran Ma, Xinxin Liu, Liang Liu, Chun Chang, Francesco Petracchini, Panpan Li
Summary: Anaerobic digestion (AD) with the addition of nano zero-valent iron (NZVI) and biochar (BC) as additives can enhance methane production, with the optimal addition amount being 9%. Exceeding 9% can inhibit gas and methane production. The combination of NZVI and BC improves methane content and organic acid degradation efficiency in corn straw AD, making it a promising commercial application.
ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
(2022)
Article
Agricultural Engineering
Daniel Pleissner, Astrid Victoria Lindner, Nicole Handel
Summary: The study explores the non-sterile heterotrophic cultivation of Galdieria sulphuraria in the presence of digestate and straw hydrolysate. Results indicate that proteolytic treatment of digestate can enhance growth rates and cell concentrations of G. sulphuraria, and the algae can utilize glucose obtained after straw hydrolysis. This research may offer promising strategies for utilizing agricultural waste streams to produce algal biomass rich in proteins.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Chao He, Hao Song, Liang Liu, Panpan Li, Mukesh Kumar Awasthi, Guizhuan Xu, Quanguo Zhang, Youzhou Jiao, Chun Chang, Yingkui Yang
Summary: The addition of hydrogen-nanobubble water significantly increased methane production from corn straw, with a maximum yield of 254.36 mL·g-VS-1. The presence of H-2-NBW disrupted the cellulose structure, reduced crystallinity, and promoted hydrolysis.
BIORESOURCE TECHNOLOGY
(2022)
Article
Energy & Fuels
Zhi Wang, Ying Guo, Weiwei Wang, Liumeng Chen, Yongming Sun, Tao Xing, Xiaoying Kong
Summary: Anaerobic digestion of corn straw faces challenges such as slow degradation, long fermentation time, and acid accumulation. Treating corn straw with sodium hydroxide and adding biochar under thermophilic anaerobic conditions can enhance methane production, reduce production fluctuations, shorten startup time, and increase the abundance of beneficial bacteria and archaea.
Article
Biotechnology & Applied Microbiology
Zhen Liu, Jinzhi Huang, Yiqing Yao, Mengyi Wang, Anjie Li
Summary: This study investigates the effect of freeze vacuum drying (FVD) pretreatment on anaerobic digestion (AD) of corn straw (CS). The results show that FVD pretreated CS has a higher potential for methane production, improved process performance, and stability compared to naturally dried CS. The study also identifies the active coordination of key bacteria and the co-relationship between key archaea and diverse methanogenesis pathways.
FERMENTATION-BASEL
(2022)
