Article
Chemistry, Physical
A. A. Kovalev, E. R. Mikheeva, I. V. Katraeva, D. A. Kovalev, A. M. Kozlov, Yu. Litti
Summary: In this study, the energy recovery from two-stage mesophilic-thermophilic anaerobic digestion of cheese whey was assessed. The maximum energy production rate of 53.2 kJ/(L d) was achieved at a COD level of 13.8 g O2/L, HRT in an acidogenic reactor of 10 h, and HRT in a methanogenic reactor of 48 h. The maximum energy yield of 14.42 kJ/g COD was obtained at a COD level of 9.2 g O2/L, HRT in an acidogenic reactor of 10 h, and HRT in a methanogenic reactor of 72 h.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Agricultural Engineering
Hao Jiang, Fan Wu, Yuchang Wang, Lu Feng, Hongjun Zhou, Yeqing Li
Summary: In-situ hydrogen biomethanation is a promising technology for upgrading biogas quality, and investigating its characteristics under different conditions is crucial for its effectiveness. The experiments showed that hydrogenotrophic methanogenesis performed better at thermophilic conditions, with the highest methane content obtained when H2 and CO2 were fed at a 4:1 ratio with Methanothermobacter as the dominant genus.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Wesley Olaya, Hina Dilawar, Cigdem Eskicioglu
Summary: The study found that ZnO NPs have inhibitory effects at medium and high levels (75 and 100 mg ZnO/g TS). Coated nanoparticles had less inhibition than non-coated nanoparticles. Thermophilic bacteria were more sensitive to ZnO NPs compared to mesophilic bacteria.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Energy & Fuels
Jingmiao Zhang, Shuai Wu, Ao Xia, Dong Feng, Yun Huang, Xianqing Zhu, Xun Zhu, Qiang Liao
Summary: Anaerobic digestion (AD) technology is an effective method for biogas production and livestock waste treatment. This study investigated the impact of oxytetracycline (OTC) on the AD process and found that OTC significantly inhibited methane production, with methane yields decreasing by 58.6% and 73.3% in mesophilic and thermophilic ADs respectively at an initial OTC concentration of 400 mg/L. OTC can be degraded by the AD process with a removal efficiency above 90% at lower concentrations. Higher OTC concentrations resulted in lower bio-methane yield, energy conversion efficiency, and contaminant removal in both mesophilic and thermophilic ADs.
Article
Environmental Sciences
Jiadong Yu, Lixin Zhao, Zonglu Yao, Jing Feng, Xufeng Yuan, Hongliang Wang, Yi Liang, Jiankun Chen, Yizhuo Du, Ruixia Shen
Summary: The study investigates the synergistic characteristics of abiotic and biotic transformation to improve the methane production efficiency in thermophilic and mesophilic sequencing batch dry anaerobic digestion (SBDAD). A pilot scale experiment using corn straw and cow dung as lignocellulosic material shows significant differences in biogas production and VFA concentration and composition. The combination of first-order hydrolysis and a modified Gompertz model increases cellulose and hemicellulose conversion efficiency by 112.03% and 90.09%, respectively, at thermophilic temperatures. The microbial community exhibits different functional network relationships under the two temperature conditions. Simulation of SBD-AD engineering shows reduced heat energy consumption and increased net energy production at thermophilic temperatures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
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
Agricultural Engineering
Yan Zhang, Qiuyan Mao, Yu-ao Su, Huimin Zhang, He Liu, Bo Fu, Zhiguo Su, Donghui Wen
Summary: The abundance of sludge ARGs and plasmid ARGs in thermophilic digesters was significantly lower than in mesophilic digesters, while the cellfree ARGs abundance was similar. Thermophilic digesters had higher archaea abundance, lower bacteria abundance, and a different microbial community compared to mesophilic ones. Firmicutes may be potential hosts of ARGs in sludge anaerobic digestion. The distinct microbial community was the main contributor to the low ARGs abundance in thermophilic sludge AD, indicating that thermophilic operation at 55 ?C is more conducive to control ARGs.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Jiri Rusin, Katerina Chamradova, Panagiotis Basinas
Summary: Anaerobic digestion of food waste at low temperature can efficiently produce biomethane. The two-stage low-temperature reactor is more energy-efficient and operates stably compared to mesophilic reactors.
Article
Environmental Sciences
Chen Shi, Yong Hu, Takuro Kobayashi, Nan Zhang, Hidetoshi Kuramochi, Zhenya Zhang, Zhongfang Lei, Kai-Qin Xu
Summary: Decabromodiphenyl ether was anaerobically digested in two continuously stirred anaerobic bioreactors under thermophilic and mesophilic conditions for 210 days. The degradation followed first-order reaction kinetics, with a higher removal rate in the thermophilic reactor. Dominant species in the thermophilic reactor were Bacillus sp. and Methanosarcina sp. with high bioactivity and concentrations of debromination microorganisms.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Thermodynamics
Benyi Xiao, Xinyi Tang, Wenzhe Zhang, Ke Zhang, Tang Yang, Yunping Han, Junxin Liu
Summary: Increasing the rice straw ratio reduced biogas and methane production, and affected the characteristics of the digestate. The impact of the rice straw ratio on methane production was slightly different between mesophilic and thermophilic Co-ADs.
Article
Agricultural Engineering
Matteo Palu, Maria Peprah, Panagiotis Tsapekos, Panagiotis Kougias, Stefano Campanaro, Irini Angelidaki, Laura Treu
Summary: This study investigates the effects of bioaugmentation on the co-digestion of cheese whey and manure in a continuous stirred tank reactor under in-situ biomethanation operations. The addition of Methanoculleus bourgensis in the mesophilic reactor resulted in a stable biomethanation process and increased methane production rate. On the other hand, the addition of Methanothermobacter thermautotrophicus in the thermophilic reactor did not improve biogas upgrading performance.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Li-Jie Wu, Xiao-Xiao Li, Yu-Xiang Liu, Fan Yang, Quan Zhou, Rui-Peng Ren, Yong-Kang Lyu
Summary: The study optimized hydrothermal pretreatment conditions for continuous mesophilic and thermophilic anaerobic digestion, finding that hydrothermal pretreatment significantly increased methane production and volatile solids reduction in both systems.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Rongzhan Liu, Ke Zhang, Xiangyu Chen, Benyi Xiao
Summary: This study investigates the effect of substrate organic composition on the anaerobic co-digestion of food waste and paper waste mixtures. The results show that the organic composition of the substrate has a greater impact on mesophilic co-digestion than thermophilic co-digestion. When the organic composition is carbohydrates:proteins:lipids = 6.8:1.8:1, the two co-digestion processes have similar biogas and methane production. However, when the organic composition is carbohydrates:proteins:lipids = 13.5:2:1, thermophilic co-digestion is more favorable. The characteristics of the thermophilic digestion process are more sensitive to changes in organic composition than the mesophilic digestion process.
Article
Engineering, Environmental
Yuanyuan Ren, Chen Wang, Ziang He, Yemei Li, Yu Qin, Yu-You Li
Summary: High-solid anaerobic co-digestion of lipids and food waste at different lipid/TS ratios was studied under thermophilic and mesophilic conditions with a HRT of 30 days. The results showed that the organic loading rate of lipids achieved 2.33 g/L/d and 1.67 g/L/d, and the degradation efficiency of lipids reached 87% and 85% in the thermophilic and mesophilic systems, respectively. The methane content in the biogas increased significantly as the lipid/TS ratio increased, and the average methane yield was 288 mL-CH4/g-COD and 275 mL-CH4/g-COD for thermophilic and mesophilic co-digestion, respectively. The energy surplus of mesophilic co-digestion was 9% higher than that of thermophilic co-digestion when the lipid/TS ratio was below 50%.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biotechnology & Applied Microbiology
Tianjie Ao, Zhijie Xie, Pan Zhou, Xiaofeng Liu, Liping Wan, Dong Li
Summary: The study found differences in the microbial community composition and methane production mechanism between mesophilic and thermophilic digestion of vegetable waste. High concentrations of volatile fatty acids led to severe inhibition of methanogens, with mesophilic digestion exhibiting higher microbial diversity and richness than thermophilic digestion.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2021)
Article
Environmental Sciences
Steef de Valk, Cuijie Feng, Ahmad F. Khadem, Jules B. van Lier, Merle K. de Kreuk
ENVIRONMENTAL TECHNOLOGY
(2019)
Review
Biotechnology & Applied Microbiology
A. Gonzalez, A. T. W. M. Hendriks, J. B. van Lier, M. de Kreuk
BIOTECHNOLOGY ADVANCES
(2018)
Article
Engineering, Environmental
Peng Wei, Robert F. Mudde, Wim Uijttewaal, Henri Spanjers, Jules B. van Lier, Merle de Kreuk
Article
Engineering, Environmental
Yu Tao, Mustafa Evren Ersahin, Dara S. M. Ghasimi, Hale Ozgun, Haoyu Wang, Xuedong Zhang, Miao Guo, Yunfeng Yang, David C. Stuckey, Jules B. van Lier
CHEMICAL ENGINEERING JOURNAL
(2020)
Article
Thermodynamics
Mohammad Soltani, Omeid Rahmani, Dara S. M. Ghasimi, Yousef Ghaderpour, Amin Beiranvand Pour, Siti Hajar Misnan, Ibrahim Ngah
Review
Environmental Sciences
Wei Fang, Xuedong Zhang, Panyue Zhang, Jijun Wan, Hongxiao Guo, Dara S. M. Ghasimi, Xavier Carol Morera, Tao Zhang
JOURNAL OF ENVIRONMENTAL SCIENCES
(2020)
Article
Engineering, Environmental
Hongxiao Guo, Jules B. van Lier, Merle de Kreuk
Article
Engineering, Environmental
G. Kooijman, M. K. de Kreuk, C. Houtman, J. B. van Lier
JOURNAL OF WATER PROCESS ENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Lenno van den Berg, Catherine M. Kirkland, Joseph D. Seymour, Sarah L. Codd, Mark C. M. van Loosdrecht, Merle K. de Kreuk
BIOTECHNOLOGY AND BIOENGINEERING
(2020)
Article
Biotechnology & Applied Microbiology
Lenno van den Berg, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study investigated the impact of different methods on the measurement of diffusion coefficients in biofilm processes. A Monte Carlo simulation was used to assess the precision of each method, revealing a wide range of variability. The results suggest that existing experimental methods may lead to inaccurate determination of diffusion coefficients.
BIOTECHNOLOGY AND BIOENGINEERING
(2021)
Article
Energy & Fuels
Adrian Gonzalez, Hongxiao Guo, Oscar Ortega-Ibanez, Coert Petri, Jules B. van Lier, Merle de Kreuk, Alexander Hendriks
Article
Environmental Sciences
Lenno van den Berg, Mario Pronk, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study compared four methods to measure the density of granular sludge in a full-scale plant treating domestic sewage, and assessed the effect of salinity on granule density. Most methods yielded reliable results, as long as the effect of salinity was considered.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Javier A. Pavez-Jara, Jules B. van Lier, Merle K. de Kreuk
Summary: Full-scale thermal hydrolysis processes (THP) can negatively impact methanogenesis during anaerobic digestion (AD). This research investigates the distribution and degradation of nutrients and melanoidins in THP-sludge during AD. The results show that THP-formed soluble melanoidins have partial biodegradability, especially those with a molecular weight below 1.1 kDa. TAN concentration increased after AD, and the presence of TAN and associated FAN strongly inhibited methanogenesis.
Article
Engineering, Environmental
Antonella Piaggio, Srilekha Mittapalli, David Calderon-Franco, David Weissbrodt, Jules van Lier, Merle de Kreuk, Ralph Lindeboom
Summary: This study investigates the effects of adding antibiotics to a micro-aerated anaerobic membrane bioreactor (MA-AnMBR). The results show that antibiotics have no effect on wastewater treatment efficiency, but they do affect the pH value and biogas composition of the process. In addition, the addition of antibiotics increases the relative abundance of antibiotic-resistant genes and mobile genetic elements in the system.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Lenno van den Berg, Sara Toja Ortega, Mark C. M. van Loosdrecht, Merle K. de Kreuk
Summary: This study investigated the diffusion of different molecular weight substrates within aerobic granular sludge, and found that the diffusion coefficients within the granules were not significantly different from those in water for substrates with molecular weights up to 4000 Da. The structure of the granules was characterized as having large macropores and semi-solid regions, with different degrees of obstruction to diffusion. Furthermore, the majority of the influent soluble COD was found to be lighter than 1 kDa, indicating that it can be considered as diffusible COD.
Article
Energy & Fuels
Shitong Fang, Houfan Du, Tao Yan, Keyu Chen, Zhiyuan Li, Xiaoqing Ma, Zhihui Lai, Shengxi Zhou
Summary: This paper proposes a new type of nonlinear VIV energy harvester (ANVEH) that compensates for the decrease in peak energy output at low wind speeds by introducing an auxiliary structure. Theoretical and experimental results show that ANVEH performs better than traditional nonlinear VIV energy harvesters under various system parameter variations.
Article
Energy & Fuels
Wei Jiang, Shuo Zhang, Teng Wang, Yufei Zhang, Aimin Sha, Jingjing Xiao, Dongdong Yuan
Summary: A standardized method was developed to evaluate the availability of solar energy resources in road areas, which combined the Analytic Hierarchy Process (AHP) and the Geographic Information System (GIS). By analyzing critical factors and using a multi-indicator evaluation method, the method accurately evaluated the utilization of solar energy resources and guided the optimal location selection for road photovoltaic (PV) projects. The results provided guidance for the application of road PV projects and site selection for route corridors worldwide, promoting the integration of transportation and energy.
Article
Energy & Fuels
Chang Liu, Jacob A. Wrubel, Elliot Padgett, Guido Bender
Summary: The study investigates the effects of coating defects on the performance of the anode porous transport layer (PTL) in water electrolyzers. The results show that an increasing fraction of uncoated regions on the PTL leads to decreased cell performance, with continuous uncoated regions having a more severe impact compared to multiple thin uncoated strips.
Article
Energy & Fuels
Marcos Tostado-Veliz, Xiaolong Jin, Rohit Bhakar, Francisco Jurado
Summary: In this paper, a coordinated charging price mechanism for clusters of parking lots is proposed. The research shows that enabling vehicle-to-grid characteristics can bring significant economic benefits for users and the cluster coordinator, and vehicle-to-grid impacts noticeably on the risk-averse character of the uncertainty-aware strategies. The developed pricing mechanism can reduce the cost for users, avoiding to directly translate the energy cost to charging points.
Article
Energy & Fuels
Duan Kang
Summary: Building an energy superpower is a key strategy for China and a long-term goal for other countries. This study proposes an evaluation system and index for measuring energy superpower, and finds that China has significantly improved its ranking over the past 21 years, surpassing other countries.
Article
Energy & Fuels
Fucheng Deng, Yifei Wang, Xiaosen Li, Gang Li, Yi Wang, Bin Huang
Summary: This study investigated the synergistic blockage mechanism of sand and hydrate in gravel filling layer and the evolution of permeability in the layer. Experimental models and modified permeability models were established to analyze the effects of sand particles and hydrate formation on permeability. The study provided valuable insights for the safe and efficient exploitation of hydrate reservoirs.
Article
Energy & Fuels
Hao Wang, Xiwen Chen, Natan Vital, Edward Duffy, Abolfazl Razi
Summary: This study proposes a HVAC energy optimization model based on deep reinforcement learning algorithm. It achieves 37% energy savings and ensures thermal comfort for open office buildings. The model has a low complexity, uses a few controllable factors, and has a short training time with good generalizability.
Article
Energy & Fuels
Moyue Cong, Yongzhuo Gao, Weidong Wang, Long He, Xiwang Mao, Yi Long, Wei Dong
Summary: This study introduces a multi-strategy ultra-wideband energy harvesting device that achieves high power output without the need for external power input. By utilizing asymmetry, stagger array, magnetic coupling, and nonlinearity strategies, the device maintains a stable output voltage and high power density output at non-resonant frequencies. Temperature and humidity monitoring are performed using Bluetooth sensors to adaptively assess the device.
Article
Energy & Fuels
Tianshu Dong, Xiudong Duan, Yuanyuan Huang, Danji Huang, Yingdong Luo, Ziyu Liu, Xiaomeng Ai, Jiakun Fang, Chaolong Song
Summary: Electrochemical water splitting is crucial for hydrogen production, and improving the hydrogen separation rate from the electrode is essential for enhancing water electrolyzer performance. However, issues such as air bubble adhesion to the electrode plate hinder the process. Therefore, a methodology to investigate the two-phase flow within the electrolyzer is in high demand. This study proposes using a microfluidic system as a simulator for the electrolyzer and optimizing the two-phase flow by manipulating the micro-structure of the flow.
Article
Energy & Fuels
Shuo Han, Yifan Yuan, Mengjiao He, Ziwen Zhao, Beibei Xu, Diyi Chen, Jakub Jurasz
Summary: Giving full play to the flexibility of hydropower and integrating more variable renewable energy is of great significance for accelerating the transformation of China's power energy system. This study proposes a novel day-ahead scheduling model that considers the flexibility limited by irregular vibration zones (VZs) and the probability of flexibility shortage in a hydropower-variable renewable energy hybrid generation system. The model is applied to a real hydropower station and effectively improves the flexibility supply capacity of hydropower, especially during heavy load demand in flood season.
Article
Energy & Fuels
Zhen Wang, Kangqi Fan, Shizhong Zhao, Shuxin Wu, Xuan Zhang, Kangjia Zhai, Zhiqi Li, Hua He
Summary: This study developed a high-performance rotary energy harvester (AI-REH) inspired by archery, which efficiently accumulates and releases ultralow-frequency vibration energy. By utilizing a magnetic coupling strategy and an accumulator spring, the AI-REH achieves significantly accelerated rotor speeds and enhanced electric outputs.
Article
Energy & Fuels
Yi Yang, Qianyi Xing, Kang Wang, Caihong Li, Jianzhou Wang, Xiaojia Huang
Summary: In this study, a novel hybrid Quantile Regression (QR) model is proposed for Probabilistic Load Forecasting (PLF). The model integrates causal dilated convolution, residual connection, and Bidirectional Long Short-Term Memory (BiLSTM) for multi-scale feature extraction. In addition, a Combined Probabilistic Load Forecasting System (CPLFS) is proposed to overcome the inherent flaws of relying on a single model. Simulation results show that the hybrid QR outperforms traditional models and CPLFS exceeds the best benchmarks in terms of prediction accuracy and stability.
Article
Energy & Fuels
Wen-Jiang Zou, Young-Bae Kim, Seunghun Jung
Summary: This paper proposes a dynamic prediction model for capacity fade in vanadium redox flow batteries (VRFBs). The model accurately predicts changes in electrolyte volume and capacity fade, enhancing the competitiveness of VRFBs in energy storage applications.
Article
Energy & Fuels
Yuechao Ma, Shengtie Wang, Guangchen Liu, Guizhen Tian, Jianwei Zhang, Ruiming Liu
Summary: This paper focuses on the balance of state of charge (SOC) among multiple battery energy storage units (MBESUs) and bus voltage balance in an islanded bipolar DC microgrid. A SOC automatic balancing strategy is proposed considering the energy flow relationship and utilizing the adaptive virtual resistance algorithm. The simulation results demonstrate the effectiveness of the proposed strategy in achieving SOC balancing and decreasing bus voltage unbalance.
Article
Energy & Fuels
Raad Z. Homod, Basil Sh. Munahi, Hayder Ibrahim Mohammed, Musatafa Abbas Abbood Albadr, Aissa Abderrahmane, Jasim M. Mahdi, Mohamed Bechir Ben Hamida, Bilal Naji Alhasnawi, A. S. Albahri, Hussein Togun, Umar F. Alqsair, Zaher Mundher Yaseen
Summary: In this study, the control problem of the multiple-boiler system (MBS) is formulated as a dynamic Markov decision process and a deep clustering reinforcement learning approach is applied to obtain the optimal control policy. The proposed strategy, based on bang-bang action, shows superior response and achieves more than 32% energy saving compared to conventional fixed parameter controllers under dynamic indoor/outdoor actual conditions.
