Article
Green & Sustainable Science & Technology
Shasha Wang, Yule Han, Xueqin Lu, Zhongxiang Zhi, Ruiliang Zhang, Teng Cai, Zhongyi Zhang, Xi Qin, Yenan Song, Guangyin Zhen
Summary: The study utilized a combined alkali-microwave-H2O2-oxidation pretreatment with in-situ bioelectrochemical regulation to enhance sludge biodegradability and methane productivity. This approach resulted in higher methane yield and stimulated the growth of functional microorganisms, demonstrating its potential for efficient sludge stabilization and bioenergy recovery strategy.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Agricultural Engineering
Jungsu Park, Roent Dune A. Cayetano, Gi-Beom Kim, Yura Jo, Yeelyung Kwon, Zhongfang Lei, Sang-Hyoun Kim
Summary: Alkaline-thermal pretreatment at 60 degrees Celsius and pH 10 for 24 hours resulted in higher methane yield and maximum net savings for WAS. Considering the degree of sludge disintegration and microbial growth are better indicators for predicting anaerobic digestibility performance.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Van Tinh Nguyen, Qui Thanh Hoai Ta, Phan Khanh Thinh Nguyen
Summary: This study proposed the application of artificial intelligence for modeling and optimization of microbial electrolysis cell-assisted anaerobic digestion (MEC-AD). Through experimental data and particle swarm optimization, the optimal parameters for al-WAS-fed MEC-AD were determined, resulting in increased energy output and net monetary value.
BIOCHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Keqiang Wang, Guanyu Zhu, Qing Feng, Xiaoxiang Li, Yaowei Lv, Yong Zhao, Hongda Pan
Summary: The performance of peat biomethanation was studied in bioelectrochemical anaerobic digestion at different applied voltages. The methane yield was significantly increased in the bioelectrochemical anaerobic digestion compared to conventional anaerobic digestion, reaching the highest at 4 V applied voltage. The enrichment of electroactive microorganisms and the enhancement of direct interspecies electron transfer were observed in the bioelectrochemical system, as well as an increase in specific microorganisms and acetoclastic methanogenesis with the increase in applied voltage. These findings offer a solution for converting low-rank coal into a new alternative energy source.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
M. Dilara Hatinoglu, F. Dilek Sanin
Summary: The presence of microplastics (MPs) in sludge treatment systems, particularly anaerobic digesters, can have an impact on their performance. However, pretreating the sludge with alkaline solution can increase methane yield and mitigate the negative effects of MPs. Furthermore, the surface morphology, crystallinity, and carbonyl index of PET microplastics change significantly after pretreatment and digestion, which may affect their fate and environmental impact.
Article
Energy & Fuels
Yufang Wei, Hongbing Zhao, Xuejiao Qi, Tianxue Yang, Junping Zhang, Wangmi Chen, Mingxiao Li, Beidou Xi
Summary: The magnetite nanoparticle-anaerobic granular sludge complex (Fe-AnGS) was used in microbial electrolysis cells (MEC) to enhance the direct interspecies electron transfer (DIET) pathway for biogas production. Fe-AnGS improved magnetization and conductivity, and enriched specific electrogenic microorganisms. It also increased the gene expression for carbon dioxide reduction and enhanced methane production. Inoculation of Fe-AnGS in MEC established and enhanced the DIET pathway for methane production.
Article
Environmental Sciences
Zhe Yu, Wenzong Liu, Yingjun Shi, Bo Wang, Cong Huang, Chunshuang Liu, Aijie Wang
Summary: The use of microbial electrolysis cell (MEC) can enhance the degradation of waste sludge lysate for high hydrogen production, leading to an increase in chemical oxygen demand (COD) removal efficiency.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Myoung Eun Lee, Yongtae Ahn, Seung Gu Shin, Jae Woo Chung
Summary: The study tested the effect of applied voltage removal on microbial electrolysis cells treating sewage sludge. The results showed that not only MEC-0.3V but also MEC-OCV outperformed anaerobic digestion in terms of methane yield and productivity, and promotion persisted with MEC-derived inoculum for two batch cycles after removing the applied voltage.
Article
Environmental Sciences
Lisha Yang, Long Chen, Kai Chen, Hongtao Zhu
Summary: This study investigated the effects of coupling microbial electrolysis cell (MEC) with anaerobic digestion (AD) on methane yield. The results showed that the methane yield was significantly improved through enhanced hydrolysis and acidogenesis, as well as enrichment of hydrogenotrophic methanogens. Carbon felt (CF) as an electrode exhibited the best performance, leading to a higher net energy output. The relative abundance of hydrogenotrophic methanogen in MEC-AD with CF as electrodes increased, contributing to the improved methane yield.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Agricultural Engineering
Wei Wang, Duu-Jong Lee, Zhongfang Lei
Summary: Anaerobic digestion is a promising technology for bioenergy production, but faces challenges such as long start up times and low methane contents. Integrating microbials electrolysis cell (MEC) with anaerobic digestion (AD) has been recognized as a promising strategy to alleviate these bottlenecks. This review summarizes current research utilizing MEC-AD for enhanced methane production, discussing process enhancements, parameter effects, and applications.
BIORESOURCE TECHNOLOGY
(2022)
Article
Thermodynamics
Mohamed Saad Hellal, Filip Gamon, Grzegorz Cema, Gamal Kamel Hassan, Gehad Ginedy Mohamed, Aleksandra Ziembinska-Buczynska
Summary: This study investigated the enrichment of biohydrogen production from pretreated industrial sludge using SiO2@Cu-Ag core-shell nanostructure. The results showed that the addition of 40 mg/L of core-shell nanostructure significantly improved the biohydrogen yield and promoted the development of hydrogen-producing bacteria.
ENERGY CONVERSION AND MANAGEMENT
(2024)
Article
Environmental Sciences
Chun-Xue Yang, Ling Wang, Yi-Jian Zhong, Ze-Chong Guo, Liu Jia, Shao-Peng Yu, Thangavel Sangeetha, Bao-Ling Liu, Chao Ni, Hong Guo
Summary: By introducing Fenton-like reagents in anaerobic digestion systems, the acidification and methanogenesis process was accelerated, leading to increased methane production and higher net energy output. MEC enhanced the enrichment of hydrogenotrophic methanogens and promoted acetogenesis and methanogenesis.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Chemical
Huihui Zhou, Defeng Xing, Jun Ma, Yanyan Su, Yifeng Zhang
Summary: Bioelectrochemical anaerobic digestion (BEAD) is an attractive method for enhancing biogas production. This study explores the use of intact anaerobic granular sludge (AGS) as a biocatalyst for efficient methane production. The BEAD system was optimized by controlling the applied voltage and acetate load, and the AGS-based system showed promising results for degrading highly concentrated organic waste. The microbial communities at the anode and cathode were also analyzed.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Biochemistry & Molecular Biology
Nhlanganiso Ivan Madondo, Sudesh Rathilal, Babatunde Femi Bakare, Emmanuel Kweinor Tetteh
Summary: The application of a bioelectrochemical system together with anaerobic additives can promote both direct and indirect interspecies electron transfer, leading to higher removal of toxic pollutants and conversion of biomass to renewable energy. This review explores the synergistic effect of bioelectrochemical systems and anaerobic additives on the anaerobic digestion of complex substrates. It highlights the mechanisms and limitations of conventional anaerobic digestion and the applicability of additives in various activities of the digestion process. The findings suggest that a bioelectrochemical system coupled with nanomaterial additives can increase biogas-methane potential compared to anaerobic digestion, indicating the potential prospects of this system for wastewater treatment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Review
Environmental Sciences
Anna Christine Trego, Simon Mills, Gavin Collins
Summary: Anaerobic digestion is recognized as a sustainable method for waste management, producing methane-rich biogas. Different specialized granules, including anaerobic and aerobic granules, have opened up new opportunities in wastewater treatment and resource recovery biotechnology. Each type of granule has unique characteristics, biochemical processes, and microbial community compositions.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Cameron Bracken, Nathalie Voisin, Casey D. Burleyson, Allison M. Campbell, Z. Jason Hou, Daniel Broman
Summary: This study presents a methodology and dataset for examining compound wind and solar energy droughts, as well as the first standardized benchmark of energy droughts across the Continental United States (CONUS) for a 2020 infrastructure. The results show that compound wind and solar droughts have distinct spatial and temporal patterns across the CONUS, and the characteristics of energy droughts are regional. The study also finds that compound high load events occur more often during compound wind and solar droughts than expected.
Article
Green & Sustainable Science & Technology
Ning Zhang, Yanghao Yu, Jiawei Wu, Ershun Du, Shuming Zhang, Jinyu Xiao
Summary: This paper provides insights into the optimal configuration of CSP plants with different penetrations of wind power by proposing an unconstrained optimization model. The results suggest that large solar multiples and TES are preferred in order to maximize profit, especially when combined with high penetrations of wind and photovoltaic plants. Additionally, the study demonstrates the economy and feasibility of installing electric heaters (EH) in CSP plants, which show a linear correlation with the penetration of variable energy resources.
Article
Green & Sustainable Science & Technology
M. Szubel, K. Papis-Fraczek, S. Podlasek
Article
Green & Sustainable Science & Technology
J. Silva, J. C. Goncalves, C. Rocha, J. Vilaca, L. M. Madeira
Summary: This study investigated the methanation of CO2 in biogas and compared two different methanation reactors. The results showed that the cooled reactor without CO2 separation achieved a CO2 conversion rate of 91.8%, while the adiabatic reactors achieved conversion rates of 59.6% and 67.2%, resulting in an overall conversion rate of 93.0%. Economic analysis revealed negative net present worth values, indicating the need for government monetary incentives.
Article
Green & Sustainable Science & Technology
Yang Liu, Yonglan Xi, Xiaomei Ye, Yingpeng Zhang, Chengcheng Wang, Zhaoyan Jia, Chunhui Cao, Ting Han, Jing Du, Xiangping Kong, Zhongbing Chen
Summary: This study investigated the effect of using nanofiber membrane composites containing Prussian blue-like compound nanoparticles (PNPs) to relieve ammonia nitrogen inhibition of rural organic household waste during high-solid anaerobic digestion and increase methane production. The results showed that adding NMCs with 15% PNPs can lower the concentrations of volatile fatty acids and ammonia nitrogen, and increase methane yield.
Article
Green & Sustainable Science & Technology
Zhong Ge, Xiaodong Wang, Jian Li, Jian Xu, Jianbin Xie, Zhiyong Xie, Ruiqu Ma
Summary: This study evaluates the thermodynamic, exergy, and economic performance of a double-stage organic flash cycle (DOFC) using ten eco-friendly hydrofluoroolefins. The influences of key parameters on performance are analyzed, and the advantages of DOFC over single-stage type are quantified.
Article
Green & Sustainable Science & Technology
Nicolas Kirchner-Bossi, Fernando Porte-Agel
Summary: This study investigates the optimization of power density in wind farms and its sensitivity to the available area size. A novel genetic algorithm (PDGA) is introduced to optimize power density and turbine layout. The results show that the PDGA-driven solutions significantly reduce the levelized cost of energy (LCOE) compared to the default layout, and exhibit a convex relationship between area and LCOE or power density.
Article
Green & Sustainable Science & Technology
Chunxiao Zhang, Dongdong Li, Lin Wang, Qingpo Yang, Yutao Guo, Wei Zhang, Chao Shen, Jihong Pu
Summary: In this study, a novel reversible liquid-filled energy-saving window that effectively regulates indoor solar radiation heat gain is proposed. Experimental results show that this window can effectively reduce indoor temperature during both summer and winter seasons, while having minimal impact on indoor illuminance.
Article
Green & Sustainable Science & Technology
Alessandro L. Aguiar, Martinho Marta-Almeida, Mauro Cirano, Janini Pereira, Leticia Cotrim da Cunha
Summary: This study analyzed the Brazilian Equatorial Shelf using a high-resolution ocean model and found significant tidal variations in the area. Several hypothetical barrages were proposed with higher annual power generation than existing barrages. The study also evaluated the installation effort of these barrages.
Article
Green & Sustainable Science & Technology
Francesco Superchi, Nathan Giovannini, Antonis Moustakis, George Pechlivanoglou, Alessandro Bianchini
Summary: This study focuses on the optimization of a hybrid power station on the Tilos island in Greece, aiming to increase energy export and revenue by optimizing energy fluxes. Different scenarios are proposed to examine the impact of different agreements with the grid operator on the optimal solution.
Article
Green & Sustainable Science & Technology
Peimaneh Shirazi, Amirmohammad Behzadi, Pouria Ahmadi, Sasan Sadrizadeh
Summary: This research presents two novel energy production/storage/usage systems to reduce energy consumption and environmental effects in buildings. A biomass-fired model and a solar-driven system integrated with photovoltaic thermal (PVT) panels and a heat pump were designed and assessed. The results indicate that the solar-based system has an acceptable energy cost and the PVT-based system with a heat pump is environmentally superior. The biomass-fired system shows excellent efficiency.
Article
Green & Sustainable Science & Technology
Zihao Qi, Yingling Cai, Yunxiang Cui
Summary: This study aims to investigate the operational characteristics of the solar-ground source heat pump system (SGSHPS) in Shanghai under different operation modes. It concludes that tandem operation mode 1 is the optimal mode for winter operation in terms of energy efficiency.
Article
Green & Sustainable Science & Technology
L. Bartolucci, S. Cordiner, A. Di Carlo, A. Gallifuoco, P. Mele, V. Mulone
Summary: Spent coffee grounds are a valuable biogenic waste that can be used as a source of biofuels and valuable chemicals through pyrolysis and solvent extraction processes. The study found that heavy organic bio-oil derived from coffee grounds can be used as a carbon-rich biofuel, while solvent extraction can extract xantines and p-benzoquinone, which are important chemicals for various industries. The results highlight the promising potential of solvent extraction in improving the economic viability of coffee grounds pyrolysis-based biorefineries.
Article
Green & Sustainable Science & Technology
Luiza de Queiroz Correa, Diego Bagnis, Pedro Rabelo Melo Franco, Esly Ferreira da Costa Junior, Andrea Oliveira Souza da Costa
Summary: Building-integrated photovoltaics, especially organic solar technology, are important for reducing greenhouse gas emissions in the building sector. This study analyzed the performance of organic panels laminated in glass in a vertical installation in Latin America. Results showed that glass lamination and vertical orientation preserved the panels' performance and led to higher energy generation in winter.
Article
Green & Sustainable Science & Technology
Zhipei Hu, Shuo Jiang, Zhigao Sun, Jun Li
Summary: This study proposes innovative fin arrangements to enhance the thermal performance of latent heat storage units. Through optimization of fin distribution and prediction of transient melting behaviors, it is found that fin structures significantly influence heat transfer characteristics and melting behaviors.