Article
Engineering, Environmental
Gamal K. Hassan, Rhys Jon Jones, Jaime Massanet-Nicolau, Richard Dinsdale, M. M. Abo-Aly, Fatma A. El-Gohary, Alan Guwy
Summary: A novel approach of using two stage anaerobic digestion coupled with electrodialysis technology successfully improved bio hydrogen and methane yields, reduced COD, and further enhanced waste treatment efficiency.
Article
Environmental Sciences
Fida Hussain, Hye-Weon Yu, Kangmin Chon, Yong-Gu Lee, Heonseop Eom, Kyu-Jung Chae, Sang-Eun Oh
Summary: The real-time respirometer combines photosensor and bubble counting sensor to accurately measure microbial oxygen consumption in wastewater, providing real-time OUR and BOD measurements. Its technical improvements allow for an extended measurable range and significant reduction in dilution steps.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Tae-Hoon Kim, Dayeong Song, Yun-Ju Jeon, Okhwa Hwang, Joo-Youn Nam, Yeo-Myeong Yun
Summary: This study found that using a combination of two or more conductive materials (CMs) can improve the production in a two-stage fermentation process (TSFP). Magnetite nanoparticle (MNP) played a crucial role in enhancing H2 production in the first stage, while powdered activated carbon (PAC) contributed to higher CH4 production in the second stage.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
J. Singh, H. Nozari, J. M. Herreros, A. Tsolakis
Summary: The study investigated the impact of aliphatic bio-alcohols on on-board thermo-chemical exhaust waste heat recovery, H2 production, and fuel savings in a GDI engine. Iso-pentanol was found to be the most effective bio-alcohol for maximizing heat recovery and reducing carbon emissions under steady state engine operation.
Review
Green & Sustainable Science & Technology
Wai Siong Chai, Yulei Bao, Pengfei Jin, Guang Tang, Lei Zhou
Summary: The combustion of fuels for energy generation is crucial for human activities, but it results in emissions that cause environmental complications and health risks. The replacement of conventional fuels for zero carbon emission is important, with ammonia offering advantages over hydrogen as a carbon-free fuel, but facing challenges such as low burning velocity and high emissions. Therefore, the study of secondary fuels like hydrogen and methane to assist ammonia combustion is essential.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Green & Sustainable Science & Technology
S. M. R. Mirkarimi, S. Bensaid, V. Negro, D. Chiaramonti
Summary: This article provides a review of recent studies on hydrogen production through methane cracking over carbon-based catalysts. The impact of operating parameters and catalyst characteristics on methane decomposition has been widely discussed.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Environmental Sciences
Tingting Hou, Jiamin Zhao, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang
Summary: This study found that supplementation of N-2 and Air-nanobubble water can significantly enhance the efficiency of hydrogen and methane production in the two-stage anaerobic digestion of food waste. Air-NBW has a promoting effect on both hydrogen and methane production stages, while N-2-NBW only has a positive impact on the hydrogen production stage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Thermodynamics
Andy Thawko, Amnon Eyal, Leonid Tartakovsky
Summary: This study discusses the performance and emissions of a direct-injection spark-ignition engine using hydrogen, hydrogen-rich reformate, and methane. The research reveals that the reformate fuel results in the highest total particle number concentration due to its longer injection duration. An optimal hydrogen injection strategy is identified to minimize particle number emission. Additionally, the overall system thermal efficiency is found to be higher in the engine running on reformate compared to hydrogen.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Mehmet Salih Cellek
Summary: In this study, non-premixed combustion and NOx emission of H-2, NH3, C3H8, and CH4 fuels were investigated. The results showed that H-2 fuel had a high flame temperature, NH3 fuel had the shortest flame length, and C3H8 fuel had the longest flame shape. The highest level of NOx emissions was observed from NH3 fuel in the combustion chamber, while the lowest NOx emissions were observed from CH4 fuel. NH3 enrichment and excess air combustion could significantly reduce the NOx emissions from H(2) and other fuels during combustion.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Khaliyah Sani, Prawit Kongjan, Charoen Pakhathirathien, Benjamas Cheirsilp, Sompong O-Thong, Marisa Raketh, Rusnee Kana, Rattana Jariyaboon
Summary: The study investigated the biohydrogen and biomethane potential of palm oil mill effluent (POME) in a two-stage anaerobic digestion system under thermophilic and mesophilic conditions. The results showed that the best production potentials were obtained from POME with an initial 0.5 g-COD loading, and the energy yield achieved from two-stage AD was significantly higher than single-stage AD. Continuous production of hydrogen and methane revealed that the highest yields were generated at specific hydraulic retention times, with an overall COD removal of approximately 66.27%.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Energy & Fuels
Vahit Corumlu, Murat Ozturk
Summary: This paper proposes the design of a new solar power-based multigeneration system for generating hydrogen, ammonia, methane, and other beneficial outputs, and investigates the plant performance and efficiencies through parametric works.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Energy & Fuels
Jinje Park, Donghee Kim, Youngjae Lee
Summary: Flameless combustion is an effective combustion technology that can simultaneously reduce CO and NOx emissions, control the formation of hot spots during combustion process, and achieve flameless combustion by internal recirculation of flue gas, leading to significant reduction in thermal NO formation. Different fuels have different effects on NO generation in flameless combustion, with hydrogen fuel having a relatively large impact due to chemical reactions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Review
Energy & Fuels
Josef Marousek
Summary: Hydrogen has a small market share but attracts many investors. The main obstacle to the development of the hydrogen economy is its low cost-competitiveness. Using various types of nanoparticles can play a positive role in (bio)hydrogen production.
Article
Engineering, Environmental
Rafika Saidi, Moktar Hamdi, Hassib Bouallagui
Summary: This study investigated H2 and CH4 production from date pulp wastes through a two-stage process. The first stage evaluated the effect of increasing organic leading rate on dark fermentation performances. The second stage used the effluent of dark fermentation as substrate for anaerobic digestion. The two-stage process can achieve high rate renewable energy recovery and organic waste processing.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Energy & Fuels
Graciela M. L. Ruiz-Aguilar, Hector G. Nunez-Palenius, Nanh Lovanh, Sarai Camarena-Martinez
Summary: The study compared methane production from non-pretreated tomato plant residues in a two-stage system versus a one-stage system, finding that while the two-stage system produced more hydrogen and methane, there were no significant differences in energy production and volatile solid removal compared to the one-stage treatment.
Article
Environmental Sciences
Elena Rossi, Isabella Pecorini, Renato Iannelli
Summary: The human health risk assessment evaluated the effectiveness of a biofilter in reducing the risk from exposure to landfill gas emissions and improving air quality, but showed a lower efficiency in reducing odour concentrations compared to the target value.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Isabella Pecorini, Elena Rossi, Renato Iannelli
Article
Green & Sustainable Science & Technology
Isabella Pecorini, Eleonora Peruzzi, Elena Albini, Serena Doni, Cristina Macci, Grazia Masciandaro, Renato Iannelli
Article
Green & Sustainable Science & Technology
Francesco Pasciucco, Isabella Pecorini, Simona Di Gregorio, Fabiano Pilato, Renato Iannelli
Summary: The study conducted a Life Cycle Assessment on recovery strategies for contaminated marine sediments in a large Mediterranean port, finding that scenarios associated with sediment recovery generated lower potential environmental impacts than the corresponding reference scenarios, especially in abiotic depletion and global warming. Further research should focus on optimizing the combined use of technologies and reducing resource consumptions for both environmental and economic benefits.
Article
Environmental Sciences
Elena Rossi, Simone Becarelli, Isabella Pecorini, Simona Di Gregorio, Renato Iannelli
Summary: The aim of this study was to investigate the performance of a pilot-scale plug-flow reactor in recovering chemicals and biogas during the dry thermophilic anaerobic digestion of organic waste. The effects of hydraulic retention time (HRT) on the outputs were studied, and a particular focus was given to characterizing the bacteria responsible for the production of volatile fatty acids (VFAs). The results showed that reducing the HRT to 16 days led to an increase in VFA concentration and biogas production.
Article
Green & Sustainable Science & Technology
Elena Rossi, Isabella Pecorini, Renato Iannelli
Summary: This study aimed to develop a multiple linear regression model to predict the specific methane production from dry anaerobic digestion of the organic fraction of municipal solid waste. By analyzing experimental data, six parameters related to specific methane production were identified, and corresponding predictive models were established.
Article
Energy & Fuels
Elena Rossi, Isabella Pecorini, Giovanni Ferrara, Renato Iannelli
Summary: The aim of this study was to optimize biogas production by reducing ammonia inhibition through different operational strategies in thermophilic dry anaerobic digestion of organic waste. Results showed that adjusting the carbon-to-nitrogen ratio significantly decreased ammonia concentration and increased biogas production.
Article
Green & Sustainable Science & Technology
Elena Rossi, Francesco Pasciucco, Renato Iannelli, Isabella Pecorini
Summary: This study compares the environmental impacts of a conventional management strategy to recover biomethane and compost with a dry anaerobic biorefinery recovering biomethane, fertilizers, and PHAs from organic waste. The analysis reveals that the conventional strategy outperforms the novel approach in terms of environmental performance. Among the different methods for PHA recovery, extraction with ethyl acetate is the most environmentally sustainable and promising technique.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Green & Sustainable Science & Technology
Francesco Pasciucco, Isabella Pecorini, Renato Iannelli
Summary: This review analyzes the best centralization level of wastewater collection and treatment, focusing on the methodologies used for decision-making and highlighting the strengths and weaknesses of different approaches and their evolution over time. The findings show a paradigm shift towards hybrid systems that combine centralized and decentralized wastewater treatments, promoting water reuse and resource recovery.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Eleftherios Touloupakis, Angeliki Chatziathanasiou, Demetrios F. Ghanotakis, Pietro Carlozzi, Isabella Pecorini
Summary: The present investigation focuses on the potential of Rhodopseudomonas sp. cells to produce clean energy, such as molecular hydrogen (H-2). The cells were immobilized in calcium alginate gel beads and cultured in a cylindrical photobioreactor to enhance H-2 production. The maximum H-2 production rate reached 5.25 mL/h with a total output of 505 mL and a light conversion efficiency of 1.20%.
Article
Green & Sustainable Science & Technology
Alessio Castagnoli, Francesco Pasciucco, Renato Iannelli, Carlo Meoni, Isabella Pecorini
Summary: This study conducted a Life Cycle Assessment (LCA) on a project to clean up a heavy metals-contaminated site in central Italy. The study aimed to identify the solution with the least environmental impact and assessed the contamination in the soil. Three action scenarios were compared, and the results showed that soil capping operations had the lowest impact.
Article
Green & Sustainable Science & Technology
Francesco Pasciucco, Giovanni Francini, Isabella Pecorini, Andrea Baccioli, Lidia Lombardi, Lorenzo Ferrari
Summary: This study conducted a life cycle assessment and life cycle costing of different scenarios for the utilization and upgrading of biogas produced from anaerobic digestion of biowaste. Four configurations were compared and sensitivity analyses were performed. The study found that while biogas combined heat and power (CHP) was the most environmentally friendly option in most impact categories, biogas upgrading-based scenarios had smaller impacts in terms of global warming potential and ozone layer depletion potential. In terms of economic viability, biogas upgrading-based scenarios had the highest net present values, but the combined production of heat, electricity, and biomethane was the most cost-effective option due to biomethane revenues and electricity sales.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Environmental Sciences
Francesco Pasciucco, Isabella Pecorini, Renato Iannelli
Summary: A life cycle assessment of three medium-sized urban wastewater treatment plants in a tourist area in central Italy was conducted. The study found that the environmental impacts of the treatment plants were higher during the peak tourist season, and there was a positive correlation between plant size and environmental performance. The results suggest that centralizing wastewater treatment plants in tourist areas can improve their environmental performance.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Isabella Pecorini, Elena Rossi, Simone Becarelli, Francesco Baldi, Simona Di Gregorio, Renato Iannelli
Summary: Dark fermentation is a simple method for hydrogen production using various organic wastes as feedstock. This study optimized the methane yield by reducing the hydraulic retention time in a two-stage reactor system. Functional inference and microbial community analysis were conducted to understand the changes in each reactor stage. The results showed an overall increase in biogas production and improvement in gas quality.
Article
Engineering, Environmental
Elena Rossi, Isabella Pecorini, Paola Paoli, Renato Iannelli
Summary: This study found that increasing the organic loading rate can enhance the production of total VFAs during dry thermophilic anaerobic digestion of organic solid waste, with propionic acid dominating. As the OLR increased, the concentrations of iso-valeric and butyric acids also increased.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)