Article
Agricultural Engineering
Xuan Luo, Yuhuan Liu, Luyao Lei, Jiali Shen, Qi Zhang, Yunpu Wang, Roger Ruan, Xian Cui
Summary: The effects of co-ensiling distillers grains and rice straw on methane production were evaluated in this study. The results showed that the group with higher distillers grains content had enriched Lactobacillus, lower pH and organic dry matter loss, and higher methane yield and energy output.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Priscila Liane Biesdorf Borth, Jessica Klarosk Helenas Perin, Arthur Ribeiro Torrecilhas, Daiane Dias Lopes, Samantha Christine Santos, Emlia Kiyomi Kuroda, Fernando Fernandes
Summary: This study evaluated the effects of food and garden waste co-digestion on the performance of anaerobic digestion process and the microbial community involved. The results showed that co-digestion improved the digestion efficiency and delayed the acidification of the reactor, promoting the growth of specific microorganisms.
BIOMASS & BIOENERGY
(2022)
Article
Engineering, Environmental
Ying Xu, Hui Geng, Renjie Chen, Rui Liu, Xiaohu Dai
Summary: The study revealed that the efficiency of methane generation from waste activated sludge (WAS) can be significantly enhanced through pretreatment with isoelectric-point (pI), which improves the hydrophobic attractions at the solid-liquid interface and promotes electron transfer efficiency. The pI pretreatment also led to an increase in the relative abundances of main functional microbes related to hydrolysis, acidification, and methanation, contributing to an overall boost in methane production.
Article
Engineering, Chemical
Tianwei Hao, Zheng Liu, Muxiang Liang, Xiaoming Liu, Jing Chen, Xiaohui Wu, Sunita Varjani, Feixiang Zan
Summary: This study demonstrates the significant impact of sulfite pretreatment on the solubilization and substrate release of PS, as well as the reduction of methane production from PS. Additionally, sulfite pretreatment affects the functional groups and degradation extent of PS.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Energy & Fuels
Gohar Ali, Monika Sharma, El-Sayed Salama, Zhenmin Ling, Xiangkai Li
Summary: This article mainly introduces the global waste generation and evaluation of chitin and chitosan as potential feedstocks in various applications. The extraction strategies, properties, degradation pathways, and challenges of conversion into biofuels are discussed. The application of pretreatments and the effect of adding chitosan on biogas production are also mentioned, as well as the potential of using chitin for bioethanol production. It is pointed out that the generation of bioenergy products will help reduce marine waste and protect environmental health.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Biotechnology & Applied Microbiology
Liu Cao, Chris D. Cox, Qiang He
Summary: This study identified the important role of Syntrophobacter in syntrophic propionate conversion, while the methanogen partners lacked consistency. Propionate conversion was mainly achieved through the transformation of propionate into acetate and hydrogen.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Agricultural Engineering
Su In Kim, Chayanee Chairattanawat, Eunji Kim, Seokhwan Hwang
Summary: Anaerobic digestion of protein-rich wastes is challenging due to the production of ammonia and hydrogen sulfide. The choice of inoculum significantly affects the maximum methane production rate.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Hui Cheng, Yemei Li, Yisong Hu, Guangze Guo, Ming Cong, Benyi Xiao, Yu-You Li
Summary: The study revealed the high conversion rates of high-solid AnMBRs in sewage sludge and food waste treatment, with net energy balance increasing as the food waste ratio rises. By establishing the relationship between carbon to nitrogen ratio and net energy balance, a new approach for predicting energy balance in different regions was introduced.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Aadila Cayenne, Ariel E. Turcios, Mette Hedegaard Thomsen, Rui Miranda Rocha, Jutta Papenbrock, Hinrich Uellendahl
Summary: The potential of halophyte plants as a substrate for biogas production was investigated, showing high biomethane yields under certain conditions. Correlations between biomethane potential and plant biochemical composition were found for Salicornia europaea and Salicornia ramosissima.
FERMENTATION-BASEL
(2022)
Article
Environmental Sciences
Rodrigo B. Carneiro, Gisele M. Gomes, Marcelo Zaiat, Alvaro J. Santos-Neto
Summary: This study investigates the impact of phase separation on the performance of anaerobic digestion (AD) by operating different configurations of anaerobic fixed bed biofilm reactors. The results show that feeding the effluent stream from the acidogenic reactor to the methanogenic reactor improves system start-up, alkalinity generation, and biomethane production. The COD removal kinetics is also enhanced in the sequential two-phase system. Hydrogenotrophic methanogenesis is the predominant pathway in the methanogenic reactor, while the Methanosaeta-driven acetoclastic pathway predominates in the acidogenic reactor. The higher diversity of bacteria and archaea in the methanogenic reactor indicates a better balance between volatile organic acid degradation and methane generation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Multidisciplinary Sciences
Rodrigo Sequeda Barros, Michel Duran Contreras, Felipe Romani Morris, Marley Vanegas Chamorro, Alberto Albis Arrieta
Summary: Waste management technologies now offer opportunities to generate value-added products. Anaerobic digestion has been identified as an effective method to produce biogas from organic wastes. This study evaluated the potential of methane production through anaerobic digestion of rumen and chicken manure, two common agroindustrial wastes from the Colombian Caribbean region. The results showed that thermophilic digestion produced more biogas, while mesophilic digestion had better biogas quality. The study also found that anaerobic digestion of rumen with added fat-oil-grease (FOG) under mesophilic conditions performed exceptionally well in terms of biogas quantity and quality.
Article
Engineering, Environmental
Xinrui Xu, Miao Yan, Yongming Sun, Ying Li
Summary: This study successfully acclimatized a cold-tolerant methanogenic consortium and applied it as a bioaugmentation seed to enhance psychrophilic anaerobic digestion (AD). Results showed that bioaugmentation increased methane yield, shortened digestion period, and reduced VFAs contents. The optimal dose for bioaugmentation was determined to be 12%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Qiuxian Qi, Chen Sun, Chicaiza Cristhian, Tengyu Zhang, Jingxin Zhang, Hailin Tian, Yiliang He, Yen Wah Tong
Summary: This study evaluated the performance of different biochar-amended anaerobic digestion systems and found that biochar produced at high gasification temperature can promote methane production and improve digestion performance. The results indicate that the surface functional groups of biochar have a significant impact on anaerobic digestion performance at different temperatures.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Wen Li, Lirong Zhu, Baocun Wu, Yongli Liu, Jinze Li, Linji Xu, Xiaoliu Huangfu, Dezhi Shi, Li Gu, Cong Chen
Summary: This study adopted a side-stream thermophilic anaerobic digestion (STA) strategy to improve the efficiency and stability of a digestive system. The results showed that STA strategy not only increased methane production and system stability, but also optimized organic metabolism patterns and promoted methane production pathways through enhanced enzyme activity.
Article
Environmental Sciences
Simon Mills, Anna Christine Trego, John Ward, Juan Castilla-Archilla, Johannes Hertel, Ines Thiele, Piet N. L. Lens, Umer Zeeshan Ijaz, Gavin Collins
Summary: This study utilized laboratory-scale bioreactors to investigate the formation, maturation, disintegration, and re-formation of new granules. The findings highlighted distinct morphological features of granule sizes and biofilm development stages, which are important for maximizing bioreactor performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
K. Hamraoui, J. A. Siles, A. F. Chica, M. A. Martin, H. El Bari
Summary: This study investigated the effect of hydrothermal pretreatment on the anaerobic digestion and co-digestion of pepper plants and eggplants. The modified Gompertz model was used to simulate the biomethanization behavior of the pretreated lignocellulosic substrates, and it successfully reproduced the experimental results.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Energy & Fuels
Kousar Jahan, Vikram Singh, Nitisha Mehrotra, Kalpana Rathore, Vivek Verma
Summary: This study synthesized activated carbon from chickpea peel waste and investigated the effect of different conditions on dye removal performance. The results showed that the porous carbon prepared under the conditions of pre-carbonization at 400 degrees Celsius, KOH ratio of 1:3, and activation temperature of 800 degrees Celsius demonstrated excellent adsorption performance. These findings provide evidence for the feasibility of using chickpea peel waste as a low-cost and sustainable precursor for activated carbon material.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Review
Environmental Studies
R. Maniarasu, Sushil Kumar Rathore, S. Murugan
Summary: This review article provides a comprehensive review of the utilization, production, and characterization of biomass-based activated carbon for CO2 adsorption, including utilization research, characterization research, and research on enhancing adsorption performance.
ENERGY & ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Hanieh Najafi, Seyedmehdi Sharifian, Neda Asasian-Kolur
Summary: This study focuses on the adsorption of gemifloxacin by rice straw-based activated carbon. The adsorption capacity of gemifloxacin was found to be dependent on the initial pH of the solution and the adsorbent dose. The pseudo-second order model and the BET isotherm models provided the best predictions for the adsorption kinetics and equilibrium behavior. The thermodynamic parameters indicated that the adsorption process is spontaneous and exothermic, with probable mechanisms involving n-pi, pi-pi, electrostatic interactions, and hydrogen bonding.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Review
Biotechnology & Applied Microbiology
Johanna Andrea Serna-Jimenez, Jose Angel Siles Lopez, Maria de los Angeles Martin Santos, Arturo Fco Chica Perez
Summary: Banana and plantain waste can be developed into high-value products such as paper, rope, fuel, and animal and human feed. This waste also has the potential to be used for the production of ethanol, methane, hydrogen, single-cell protein, and as a substrate for mushroom cultivation. Integrated utilization of this waste in a biorefinery approach is presented.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2023)
Article
Environmental Sciences
A. Ruiz-Munoz, J. A. Siles, P. Marquez, M. Toledo, M. C. Gutierrez, M. A. Martin
Summary: This study evaluated five urban wastewater treatment plants with different biological treatment, wastewater types, and sizes, aiming to analyze and compare odor emissions and identify the main causes. The results showed that facilities with EAAS technology were more efficient than RBC, and sludge management facilities were identified as the critical odor source. Chemometric analysis helped to find differences between the plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
M. C. Gutierrez, M. A. Hernandez-Ceballos, P. Marquez, A. F. Chica, M. A. Martin
Summary: This research used gaseous samples, olfactometric and chemical analysis, air mass trajectory analysis, and dispersion modeling to evaluate the impact of odorous and VOC emissions from a waste treatment plant (WTP) on nearby communities. The study found that the mean removal efficiency of the WTP biofilter was 37.0%, with Tarrasa being the most affected community. These results highlight the significant deterioration of air quality caused by WTP emissions.
ATMOSPHERIC POLLUTION RESEARCH
(2023)
Article
Food Science & Technology
J. A. Serna-Jimenez, L. S. Torres-Valenzuela, A. Sanin Villarreal, C. Roldan, M. A. Martin, J. A. Siles, A. F. Chica
Summary: Two methods of extracting caffeine and total polyphenols from coffee pulp waste were evaluated. The ultrasound-assisted extraction (USAE) method showed higher extraction performance and lower energy requirement, making it a promising alternative for extracting biocompounds from coffee pulp waste.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Omar Kerrou, Nabila Lahboubi, Mohammed Bakraoui, Hassan El Bari
Summary: This research investigates the utilization of thermal and ultrasound pre-treatments to enhance methane production from date palm leaflet waste through anaerobic digestion. The results demonstrate that the application of high ultrasonic and thermal energies can increase the biodegradation rate and subsequently boost methane production. Additionally, the modified Logistic and modified Gomperz models provide insight into the maximum cumulative methane production from different substrates. Overall, this study emphasizes the potential of innovative pre-treatment strategies to improve the efficiency of anaerobic digestion for waste management and energy production.
PHYSICS AND CHEMISTRY OF THE EARTH
(2023)
