Article
Green & Sustainable Science & Technology
Renata S. Cavaignac, Newton L. Ferreira, Roberto Guardani
Summary: This study provides a techno-economic and environmental analysis of biogas upgrading processes, highlighting the effectiveness of diglycolamine-based upgrading route in removing carbon dioxide and producing methane-enriched biomethane. The study also evaluates the net present value under economically feasible conditions and estimates a significant reduction in CO2 equivalent emissions for the upgraded biomethane based on Life Cycle Assessment (LCA).
Article
Thermodynamics
Panagiotis Tsapekos, Laura Treu, Stefano Campanaro, Victor B. Centurion, Xinyu Zhu, Maria Peprah, Zengshuai Zhang, Panagiotis G. Kougias, Irini Angelidaki
Summary: This study demonstrates the production of high-purity methane through biological CO2 hydrogenation under real environmental conditions with a trickle bed reactor. The microbial community in the reactor showed distinct clustering characteristics, with different layers of packing material and liquid phase having varying effects on the reaction process.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Multidisciplinary
P. Canu, M. Pagin
Summary: A thermodynamic analysis of CO2 methanation within biogas provides guidance for developing efficient catalysts and processes. The results show that operating temperature and pressure significantly affect the purity of the product and the leakage of hydrogen. Applying multiple stages and steam condensation can further improve purity and reduce leakage.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Engineering, Environmental
Farinaz Ebrahimian, Giovanna Lovato, Merlin Alvarado-Morales, Muhammad Tahir Ashraf, Jose Alberto Domingues Rodrigues, Panagiotis Tsapekos, Irini Angelidaki
Summary: This study examined the effect of trace metals on H2/CO2 biomethanation, finding that they are crucial for efficient methane production. During nutrient deprivation, the suppression of hydrogenotrophic archaea at higher gas rates led to a decrease in methane content and an increase in acetic acid concentration. After nutrient supplementation, increased concentrations of Co, Ni, and Fe were found to enhance methanogenic activity, resulting in high methane content and low acetic acid concentration. Mathematical modeling demonstrated that iron limitation suppressed hydrogenotrophic archaea, leading to hydrogen accumulation and the growth of homoacetogenic bacteria.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Cristian Moya, Ruben Santiago, Daniel Hospital-Benito, Jesus Lemus, Jose Palomar
Summary: Biogas upgrading is the process of removing impurities to obtain high-quality biomethane, with no predominant technology currently available. In this study, an IL-based CO2 chemical absorption process was tested to achieve high purity biomethane. Optimal specific energy consumption was found at specific operating temperatures and pressures in both the absorber and stripper columns, showing potential for cost savings and efficient removal of impurities.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Jose Juan Segovia, Alejandro Moreau, Xavier Paredes, Teresa E. E. Fernandez-Vicente, David Vega-Maza, Maria Carmen Martin
Summary: The study presents measurements of the speed of sound of biogas mixtures from a biomethanation plant in Madrid. The experimental results were fitted using a virial-type equation and compared with reference equations for natural gas mixtures, showing good agreement. The findings highlight the reliability of these equations in predicting the thermodynamic behavior of biogas.
Article
Energy & Fuels
Junaid Haider, Muhammad Abdul Qyyum, Amjad Riaz, Ahmad Naquash, Bilal Kazmi, Muhammad Yasin, Abdul-Sattar Nizami, Manhee Byun, Moonyong Lee, Hankwon Lim
Summary: Biogas, as a renewable fuel, requires purification and upgrading due to trace contaminants and high CO2 content. Chemical absorption is commonly used, but issues such as solvent decomposition, toxicological impact, high maintenance costs, and corrosivity limit its large-scale application. Ionic liquids have emerged as alternative solvents with advantages in CO2 uptake, thermal stability, and negligible vapor pressure. This review provides the first comprehensive comparison of biogas upgrading technologies, highlighting the potential of ILs for practical, technical, and economic viability.
Article
Green & Sustainable Science & Technology
L. C. Moreira, P. O. Borges, R. M. Cavalcante, A. F. Young
Summary: This study aims to simulate and economically compare alternative processes for the production and treatment of biogas from vinasse, the main residue of ethanol production. The results showed that using an anaerobic lagoon and silica gel adsorption for water removal is the best process alternative for biogas treatment.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Agricultural Engineering
Sergio Paniagua, Raquel Lebrero, Raul Munoz
Summary: This paper provides a comprehensive analysis of the technology for biomethanation of synthesis gas derived from gasification of solid waste, summarizing its potential and areas for further research.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Chemical
Rafael Canevesi, Carlos A. Grande
Summary: The use of bio-methane as a fuel is an important alternative to reduce greenhouse gas emissions. Zeolite 4A, as a selective material, can partially exclude or delay the adsorption of CH4, making it a viable alternative for biogas upgrading processes. Experimental results showed that the zeolite 4A achieved over 98% bio-methane purity and a recovery rate of around 90%, indicating its effectiveness in similar pressure conditions as commercial adsorbents used in industrial PSA units.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
Shams Forruque Ahmed, M. Mofijur, Karishma Tarannum, Anika Tasnim Chowdhury, Nazifa Rafa, Samiha Nuzhat, P. Senthil Kumar, Dai-Viet N. Vo, Eric Lichtfouse, T. M. Mahlia
Summary: Physical and chemical upgrading technologies are widely used and effective in biogas production, but they require high energy and resources. Biological methods show great potential but have been less explored in research.
ENVIRONMENTAL CHEMISTRY LETTERS
(2021)
Article
Chemistry, Multidisciplinary
Leslie Meier, Carlos Vilchez, Maria Cuaresma, Alvaro Torres-Aravena, David Jeison
Summary: Photosynthetic microorganisms, like microalgae, can be used as an alternative method to remove CO2 from biogas. This study showed that the pH changes in microalgae culture caused by the uptake of CO2 from the biogas in counterflow columns had an effect on the photosynthetic activity, but the damage was reversible.
APPLIED SCIENCES-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Esfandiyar Naeiji, Alireza Noorpoor, Hossein Ghanavati
Summary: This study investigated two methods of biogas upgrading from organic municipal waste, comparing their thermoeconomic indices. The results showed that the chemical scrubbing method was more economically feasible and could produce high-intensity hydrogen.
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
Engineering, Chemical
Arash Rahimalimamaghani, Rouzbeh Ramezani, David Alfredo Pacheco Tanaka, Fausto Gallucci
Summary: Membrane technology is an efficient separation and purification technology with low carbon footprint and energy consumption. The study successfully fabricated carbon molecular sieve (CMS) membranes for selective separation of CO2 from methane and nitrogen. Gas permeation experiments were performed to test the selectivity and permeance of the CMS membranes under different temperature and pressure conditions. A novel multistage membrane process design was proposed to evaluate the feasibility of using the CMS membranes for CO2 separation from various carbon emission sources.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Maria Gaspari, Merlin Alvarado-Morales, Panagiotis Tsapekos, Irini Angelidaki, Panagiotis Kougias
Summary: The application of mathematical models as tools and early warning indicators can optimize the anaerobic digestion process in biogas reactors. The Bioconversion Model (BioModel) was evaluated in this study for simulating common perturbation cases caused by fatty acids and ammonia inhibition. The simulations showed good agreement with experimental data on methane productivity and pH, but discrepancies were observed in the prediction of volatile fatty acids' concentrations. Adjustments to the model's kinetic parameters were necessary to improve the prediction accuracy. Overall, the BioModel demonstrated effectiveness in simulating different co-digestion strategies with fatty acid or ammonia presence.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Yao Zhang, Chunxing Li, Zengwei Yuan, Ruming Wang, Irini Angelidaki, Gefu Zhu
Summary: This review summarizes the roles of syntrophic bacteria and methanogens in the anaerobic digestion (AD) process, revealing the mechanisms of metabolism pathways, microbial characteristics, substrate oxidation, and electron transfer in syntrophic methanogenesis. The review also provides an overview of process control and optimization methods for improving the efficiency of syntrophic methanogenesis.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Syed Salman Ali Shah, Hyeona Park, Hyung-June Park, Jinwoo Kim, Irini Angelidaki, Changsoo Lee, Jeonghwan Kim, Kwang-Ho Choo
Summary: This study reports a novel composite biomedium composed of quorum quenching bacteria, porous silica, and polyelectrolytes for controlling membrane fouling in anaerobic membrane bioreactors (AnMBRs). The results show that the composite biomedium significantly delays membrane fouling and exhibits high durability. Moreover, the biomedium does not affect the anaerobic treatment performance.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Ehsan Sarlaki, Mohammad Hossein Kianmehr, Marzieh Ghorbani, Ali Mashaallah Kermani, Keyvan Asefpour Vakilian, Irini Angelidaki, Yajing Wang, Vijai Kumar Gupta, Junting Pan, Meisam Tabatabaei, Mortaza Aghbashlo
Summary: A cost-effective and energy-efficient nitro-humification process was developed for nitrogen functionalization and activation of lignite humic substances. Different metrics were determined for the processed lignite including solubility, physicochemical properties, oxidation degree, nitrogen functionalization, spectral ratios, and surface functionalization. The process showed improved solubility, balanced nitrogen binding forms, and enhanced carbon and nitrogen content. It also increased cation exchange capacity, carboxylic and phenolic groups, crystallinity index, and availability of macromicronutrients and rare earth elements.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Hyunjin Kim, Byoung-In Sang, Panagiotis Tsapekos, Irini Angelidaki, Merlin Alvarado-Morales
Summary: This study presents a techno-economic analysis of succinic acid production using sugar-rich residual streams and biogas as raw materials. The results show that by establishing an integrated process, high SA production can be achieved while improving the quality of biogas. The process converts CO2 from biogas and carbohydrates from organic by-products into biomethane and succinic acid.
Article
Engineering, Chemical
Hyeona Park, Syed Salman Ali Shah, Gregory Korshin, Irini Angelidaki, Kwang-Ho Choo
Summary: This study investigates the impact of sunlight irradiation on membrane fouling, biopolymers, signal molecules, and microbial communities in MBRs. The results show that sunlight can degrade signal molecules that induce membrane biofouling. Sunlight exposure also leads to changes in microbial behavior and community composition in MBRs.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Review
Environmental Sciences
Azra Naderi, Babak Kakavandi, Stefanos Giannakis, Irini Angelidaki, Roshanak Rezaei Kalantary
Summary: Wastewater treatment using bioelectrochemical systems (BESs) has diverse applications, including renewable energy production, environmental pollution reduction, biosensors, and bioelectrosynthesis. This review article critically discusses the challenges and advances in bio-electrochemical studies in the 21st century, focusing on the structure, performance, and application of BESs such as Microbial Fuel Cells (MFCs), Microbial Electrolysis Cells (MECs), and Microbial Desalination Cells (MDCs). The review highlights the impact of various parameters on treatment processes and energy/fuel production, aiming to guide future studies and promote the practical application of BESs in achieving sustainable development.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Sonia Mohamadnia, Anders Thygesen, Parisa Ghofrani-Isfahani, Anna Pia Monachese, Borja Valverde-Perez, Irini Angelidaki
Summary: Wastewater from the potato processing industry, protamylasse, can be valorized through the cultivation of microalgae by mixotrophic metabolism. A new two-stage system was developed, where volatile fatty acids (VFA) were produced through anaerobic acidification (AA), and Chlorella sorokiniana was cultivated for valorization of nutrients and organics. This process resulted in high removal efficiencies of phosphorus, nitrate, and ammonia, and the production of microalgal biomass with high protein content.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Environmental Sciences
Zengshuai Zhang, Chunxing Li, Guan Wang, Xiaoyong Yang, Yanxiang Zhang, Ruming Wang, Irini Angelidaki, Hengfeng Miao
Summary: Anaerobic digestion of antibiotic manufacturing wastewater using Fe3O4-modified biochar can effectively detoxify erythromycin, increase methane yield, and reduce antibiotic resistant genes. The addition of Fe3O4-modified biochar stimulates the anaerobic digestion process, leading to higher methane production. Different levels of Fe3O4-modified biochar promote the growth of specific bacteria and archaea, further enhancing the efficiency of anaerobic digestion.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biochemical Research Methods
Eleftheria Papadopoulou, Mari Cristina Rodriguez de Evgrafov, Argyro Kalea, Panagiotis Tsapekos, Irini Angelidaki
Summary: Three bacterial species were isolated from seaweed biomass and evolved to increasing concentrations of NaCl. Two of the evolved strains showed increased salt tolerance and were able to produce lactic acid in hypersaline seaweed hydrolysate. Mutations in genes affecting ion balance and cell membrane composition were observed in the evolved lineages.
Article
Engineering, Environmental
Zunjing Lv, Xiaofang Pan, Zhi-Long Ye, Irini Angelidaki, Nan Lv, Yanlin Li, Guanjing Cai, Lifeng Lin
Summary: The aim of this study was to reduce the risk of VFA accumulation and optimize anaerobic digestion by promoting the enrichment of homoacetogens. It was found that homoacetogens had a higher abundance at ambient temperature, which effectively reduced the risk of VFA accumulation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Farinaz Ebrahimian, Giovanna Lovato, Merlin Alvarado-Morales, Muhammad Tahir Ashraf, Jose Alberto Domingues Rodrigues, Panagiotis Tsapekos, Irini Angelidaki
Summary: This study examined the effect of trace metals on H2/CO2 biomethanation, finding that they are crucial for efficient methane production. During nutrient deprivation, the suppression of hydrogenotrophic archaea at higher gas rates led to a decrease in methane content and an increase in acetic acid concentration. After nutrient supplementation, increased concentrations of Co, Ni, and Fe were found to enhance methanogenic activity, resulting in high methane content and low acetic acid concentration. Mathematical modeling demonstrated that iron limitation suppressed hydrogenotrophic archaea, leading to hydrogen accumulation and the growth of homoacetogenic bacteria.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Antonios A. Lithourgidis, Thomas A. Kotsopoulos, Sotirios D. Kalamaras, Ioannis V. Skiadas, Mariusz Kuglarz, Francesco Vigato, Merlin Alvarado-Morales, Irini Angelidaki
Summary: This study aimed to assess the production of succinic acid using waste residual streams through fermentation, and investigate its process performance and purification methods. The results showed that the concentration and yield of succinic acid varied under different operating conditions. Furthermore, a successful downstream concept for SA purification was developed, achieving high purity and crystallization recovery.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)