Article
Green & Sustainable Science & Technology
W. E. Abd Allah, M. A. Tawfik, Atul A. Sagade, Shiva Gorjian, K. A. Metwally, Hanan El-Shal
Summary: This study demonstrated that co-digestion of cattle manure and milled corn stover significantly increased the methane yield and performance of a family-scale biogas digester compared to anaerobic mono-digestion. The use of co-digestion resulted in higher daily, cumulative, and specific methane yields, as well as increased biogas energy production, under winter conditions.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Engineering, Environmental
Maria Jose Fernandez-Rodriguez, Maryam Mushtaq, Li Tian, Antonia Jimenez-Rodriguez, Barbara Rincon, Brandon H. Gilroyed, Rafael Borja
Summary: Lignocellulosic by-products from agricultural crops are important raw materials for anaerobic digestion and clean renewable energy. Different physicochemical pretreatments were compared using corn stover biomass, with alkaline pretreatment leading to the highest methane yield and autoclave pretreatment resulting in the highest organic matter solubilization. Mathematical models were utilized to assess anaerobic biodegradation, showing an increase in kinetic constants with pretreatment methods.
WASTE MANAGEMENT & RESEARCH
(2022)
Article
Biochemistry & Molecular Biology
Qiong Yu, Shaofeng Cui, Chen Sun, Ronghou Liu, Manobendro Sarker, Zhijian Guo, Ruiyin Lai
Summary: The study analyzed the pretreatment effects and synergistic effects of anaerobic co-digestion of corn stover and chicken manure. The NaOH-H(2)O(2) pretreatment was more effective in promoting anaerobic digestion compared to urea pretreatment, with the best results achieved at a mixing ratio of 1:3. Synergistic effects were observed at specific mixing ratios for both types of pretreated corn stover.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2021)
Article
Agricultural Engineering
Wanli Zhang, Xue Wang, Wanli Xing, Rundong Li, Tianhua Yang, Nan Yao, Dan Lv
Summary: The study found that co-digestion of food waste with cattle manure is more likely to achieve synergy compared to other combinations, which is achieved through coupling effects such as improving nutrient balance and dilution of toxic compounds. In the process of co-digestion, specific microbial communities can accelerate detoxification and system recovery through co-metabolism.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agronomy
Xiaohong Su, Jingbo Qu, Yan Huang, Wei Liu, Yong Sun
Summary: Reflux of biogas slurry is an effective way to reduce wastewater discharge. This study investigated the pretreatment of biogas slurry using microfiltration membrane and biochar adsorption. The results showed that the combination of 0.65 μm microfiltration and 7 g/L biochar had the best filtration and adsorption effects. The anaerobic co-digestion of the pretreated reflux fluid and corn stover resulted in advanced gas production and higher methane production.
Article
Green & Sustainable Science & Technology
A. A. Ajayi-Banji, S. Sunoj, C. Igathinathane, S. Rahman
Summary: Long lag phase and reactor instability pose challenges for describing and predicting methane yield in upset solid-state anaerobic digestion. Seven kinetic models were used for treatment evaluation, with different models best describing methane yield for different treatments. Predicting optimal hydraulic retention time for the least inhibited treatment can aid in reactor design and methane yield simulation.
Article
Agricultural Engineering
Yan Li, Dongliang Hua, Haipeng Xu, Yuxiao Zhao, Fuqiang Jin, Xu Fang
Summary: The study demonstrates that pretreatment of lignocellulosic materials with organic acids can enhance the production of volatile fatty acids (VFAs), but can also inhibit microbial metabolism when the concentration exceeds a certain limit. The type of organic acids affects the metabolic pathway of VFAs, and hydrothermal-organic acid pretreatment can provide crucial information, especially when considering organic loading rates.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Agricultural Engineering
Begona Mayans, Rafael Anton-Herrero, Carlos Garcia-Delgado, Nely Carreras, Laura Delgado-Moreno, Consuelo Escolastico, Rocio Millan, Enrique Eymar
Summary: Livestock manure can be utilized to produce biogas by pre-treating it with ligninolytic fungi, which can break down lignin and facilitate the hydrolysis step, leading to higher biomethane production. Three strategies of incubation with Pleurotus fungi were evaluated, showing a significant increase in methane production compared to the control group. Extracts from Pleurotus fungi could be considered as a novel and promising tool for optimizing methane production.
BIOMASS & BIOENERGY
(2023)
Article
Polymer Science
Yao Lu, Hairong Yuan, Xiaoyu Zuo, Yanqing Chang, Xiujin Li
Summary: This study focuses on improving the biodegradability of corn stover (CS) for anaerobic digestion (AD). By combining urea with mild temperature hydrotherm pretreatment, researchers found that the pretreatment significantly increased biomethane yield and volatile solid removal rates. Furthermore, altering the microstructure of CS through pretreatment had a positive impact on the microbial community.
Article
Energy & Fuels
Jyoti Rani, Abhishek S. Dhoble
Summary: The study demonstrates the superiority of microbial community from digested manure in producing biogas from rice straw and highlights the changes in bacterial and archaeal genera during anaerobic digestion. Reactors inoculated with digested manure outperformed those inoculated with raw manure by producing significantly higher biogas.
Article
Agricultural Engineering
Qiong Yu, Chen Sun, Ronghou Liu, Dominic Yellezuome, Xianpu Zhu, Ruifeng Bai, Mingquan Liu, Mengzeng Sun
Summary: The study investigates the performance of biochar mediated anaerobic co-digestion of corn stover and chicken manure, showing that urea pretreatment and biochar addition can improve co-AD, with a synergistic effect under medium and high OLR conditions. The results reveal that urea pretreatment and biochar addition promoted the AD process by strengthening the buffer capacity system and improving the degradation of lignocellulosic biomass.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Julio E. Hilgert, Christiane Herrmann, Soren O. Petersen, Federico Dragoni, Thomas Amon, Vitaly Belik, Christian Ammon, Barbara Amon
Summary: During manure storage, degradation of organic matter reduces methane emissions and affects biogas production. A study in Germany found that storage led to a 20.5% decrease in methane potential for dairy manure and a 39.5% decrease for pig manure. Timely delivery of manure to biogas plants can prevent significant methane losses and energy reduction.
Article
Environmental Sciences
Ye Yang, Mengyao Wang, Su Yan, Xiaoyu Yong, Xueying Zhang, Mukesh Kumar Awasthi, Yonglan Xi, Jun Zhou
Summary: This study aimed to improve methane production in mixed anaerobic digestion by adding hydrochar and biogas slurry reflux. The results showed that hydrochar provided attachment for microbial growth and had abundant surface functional groups for adsorption. The addition of hydrochar and biogas slurry reflux significantly increased methane and biogas production. The study also found that the addition of hydrochar and biogas slurry reflux improved the microbial abundance and diversity, and promoted methane yield through enhanced redox characteristics and DIET.
Article
Energy & Fuels
Salih Sozer
Summary: Energy is strategically important for all countries. The use of new energy and renewable energy resources should be expanded to ensure the long-term utilization of limited energy resources. Organic residues produced in agricultural areas and agro-industrial activities can be converted into useful energy by evaluating biomass resources and bringing them into the economy.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Green & Sustainable Science & Technology
Farida Hanum, Masanori Nagahata, Tjokorda Gde Tirta Nindhia, Hirotsugu Kamahara, Yoichi Atsuta, Hiroyuki Daimon
Summary: The Integrated Agriculture System in Indonesia was established in 2009 and 752 small-scale anaerobic digestion systems were installed by the end of 2018. This study comprehensively analyzed the system by considering operating conditions, digester performance, and site-specific factors for biogas production. The digester produced unstable amounts of biogas, in contrast to a digester in Japan which produced a much higher amount due to different inputs and objectives. The study suggested that monitoring and controlling operational parameters could increase biogas production and improve the quality of compost and bio-urine.
