Article
Green & Sustainable Science & Technology
Xiao Li, Kejing Zhang, Yingwen Xue
Summary: This study proposed a fluidized-bed biofilm reactor with biomineralization capability for continuous and circular immobilization of lead. By optimizing the operating parameters of the reactor, a high lead removal efficiency can be achieved in a short period of time. The reactor maintains a high removal efficiency when treating practical wastewater, without secondary pollution.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Green & Sustainable Science & Technology
Lin Chen, Peng Chen, Zhenhu Wang, Weifeng Liu, Duchao Zhang, Tianzu Yang
Summary: A novel reduction-sulfurization process using a fluidized bed reactor was investigated for treating lead sulfate containing residue. The study showed that under optimal process conditions, with enhanced mass transfer in the fluidized bed reactor, the conversion and sulfurization ratios of PbSO4 were significantly improved, offering a highly potential approach for processing lead sulfate containing wastes in a clean and economical manner.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
T. P. Makhathini, J. Mulopo, B. F. Bakare
Summary: This study explored the sulfidogenic co-treatment of real acid mine and hospital wastewater using a mesophilic operated fluidized-bed reactor. Hospital wastewater, enriched with organic matter, was used as a carbon source for sulfate reduction bacteria. The treatment exhibited high efficiency in sulfate and chemical oxygen demand removal, with removal rates exceeding 95% and 96%, respectively. Organic oxidation was identified as the controlling factor in the sulfidogenic treatment of sulfate and metal-containing wastewater. The study successfully developed an artificial neural network (ANN) model that accurately predicted the concentrations of the outputs.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Review
Energy & Fuels
Hengjun Gai, Peiyi Yang, Qiang Zhang, Mengqi Lin, Hongbing Song, Meng Xiao, Tingting Huang, Quanhong Zhu
Summary: Circulating fluidized bed reactors are widely used in the energy industry for gas-solid reactions. They can be classified into two categories based on fluidization regimes: dilute-dense and dual-dense. The concept of dual-dense gas-solid circulating fluidization has not been well understood, hindering its commercial application. This review provides a detailed analysis of the dual-dense system, including mechanism, structural and operating parameters, particle circulation prediction, gas-solid flow simulation, and potential applications, while identifying existing controversies and unresolved issues.
Article
Environmental Sciences
Ahmad Rezaee, Salman Ahmady-Asbchin
Summary: The use of bioreactor technology for treating industrial wastewater with heavy metals has brought new possibilities. This research presents a comprehensive approach for removing aqueous cadmium through biosorption in a moving bed biofilm reactor (MBBR). A bacterium, CdIW2, resistant to Cd(II) (350 mg/L), was selected among eight cadmium-tolerant bacteria isolated from industrial wastewater. The highest biosorption capacity of 65.79 mg/g was achieved under optimal conditions. The biosorption of the CdIW2 strain followed the Langmuir isotherm and pseudo-second order kinetics, indicating spontaneous thermodynamic and endothermic results.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Green & Sustainable Science & Technology
Manoj Kumar, Kannan Pakshirajan
Summary: This study successfully demonstrated the removal and recovery of heavy metals from synthetic wastewater using sulfidogenic anaerobic inverse fluidized bed reactors. The recovered metal sulfides were in nanopowder form with high recovery percentages, showing potential for industrial application.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Environmental
Quanhong Zhu, Weikang Hao, Jinliang Tao, Qingshan Huang, Chao Yang
Summary: This study compared the bed states obtained under four typical operation modes of the magnetized fluidized bed (MFB) reactor, and found that the bed state was a path function, depending on both the magnetic field intensity and superficial gas velocity, as well as the operation mode and internal friction. Many of these bed states were demonstrated to be metastable, behaving like different states of water and evolving into stable states after perturbations. The metastable states in zone I behaved like the amorphous/glass state, residing at another metastable state before reaching the stable positions.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Applied
Lucas Dal Magro, Joao Pedro S. Pessoa, Manuela P. Klein, Roberto Fernandez-Lafuente, Rafael C. Rodrigues
Summary: This study immobilized a commercial enzyme cocktail for fruit juice clarification on chitosan beads and found that despite low activity recovery after immobilization, the stability of the immobilized enzyme was greater than that of the free enzyme. The enzyme retained higher activity levels under extreme conditions, and the fluidized-bed reactor showed better juice clarification capacity compared to the packed-bed reactor.
Article
Thermodynamics
D. T. Pio, L. C. M. Ruivo, L. A. C. Tarelho, J. R. Frade, E. Kantarelis, K. Engvall
Summary: This study investigated the tar concentration in the producer gas from direct gasification of residual forest biomass from eucalyptus, and found that the tar concentration decreased significantly with increasing gasifier operation time.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Engineering, Environmental
Jorge Ramirez-Munoz, Roman Guadarrama-Perez, Alejandro Alvarado-Lassman, Jose J. Valencia-Lopez, Valaur E. Marquez-Banos
Summary: The study investigates the unsteady laminar flow of an inverse fluidized bed reactor using CFD, with 2D simulations showing similar results to 3D simulations, and the Syamlal O'Brien model providing better agreement with experimental data than the Gidaspow model.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
Jan Derco, Nikola Soltysova, Tomas Kurak, Anna Vajicekova, Jozef Dudas
Summary: Calcium and magnesium are important for human health and reducing the corrosive effects of soft water on drinking water distribution materials. The recarbonization process was studied using fluidized bed reactors to increase the content of these elements in water. The influence of operating conditions was investigated, with the Mg2+ concentration being more affected by HCD quantity and CO2 flow, while the freshwater inflow had a lesser effect.
Article
Agricultural Engineering
Wenming Fu, Yaning Zhang, Longfei Cui, Hui Liu, Tarique Maqsood
Summary: This study investigated the production of syngas from microwave-assisted air gasification of biomass in a fluidized bed reactor. The highest syngas yield, higher heating value, and cold gas efficiency were achieved at a gasification temperature of 900 degrees C, equivalence ratio of 0.35, and silicon carbide load of 30 g. The introduction of microwave-assisted heating showed positive effects on tar reduction.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Manuel Jose Leal-Gutierrez, Rodrigo Cuellar-Briseno, Andrei M. Castillo-Garduno, Marisela Bernal-Gonzalez, Angel Enrique Chavez-Castellanos, Julio Alberto Solis-Fuentes, Maria-del-Carmen Duran-Dominguez-de-Bazua, Enrique Rodolfo Bazua-Rueda
Summary: The study successfully demonstrated the feasibility of transforming metal sulfates into metal sulfides through the UASB reactor, with a focus on optimizing the COD:SO42- ratio. By utilizing sulfate-reducing microorganisms to precipitate metal sulfides under appropriate pH and COD:SO42- ratio conditions, effective metal recovery was achieved.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Alessio Mattia Gesualdo, Marco Milanese, Gianpiero Colangelo, Arturo de Risi
Summary: In this study, a new fluidized-bed zinc-air fuel cell is designed, tested, and characterized. The integration of the fluidized bed provides key advantages such as reducing erosion of the anode passivation layer and decreasing the concentration overpotential.
ADVANCED SUSTAINABLE SYSTEMS
(2023)
Article
Engineering, Environmental
Mervenur Kilic, Tulay Yilmaz, Recep Partal, Emrah Sik, Ozgur Dogan, Mehmet Kitis, Erkan Sahinkaya
Summary: This study investigated nutrient recovery through struvite precipitation from anaerobic digester supernatant with high concentrations of nitrogen and phosphorus using a fluidized-bed reactor. The results showed that struvite could be successfully precipitated at high performances even with a hydraulic retention time (HRT) of 2.5 minutes and molar Mg2+/NH4+/PO4 3- ratio of 1.5/16.6/1. The highest NH4-N and PO4-P precipitation performances were achieved at an Mg/P molar ratio of 2. Furthermore, volatile fatty acid presence did not adversely affect the struvite precipitation performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biotechnology & Applied Microbiology
Rodolfo Palomo-Briones, Eric Trably, Nguyen Esmeralda Lopez-Lozano, Lourdes B. Celis, Hugo Oscar Mendez-Acosta, Nicolas Bernet, Elias Razo-Flores
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2018)
Article
Agricultural Engineering
Jose de Jesus Montoya-Rosales, Diana Karime Olmos-Hernandez, Rodolfo Palomo-Briones, Virginia Montiel-Corona, Angelo Gabriel Mari, Elias Razo-Flores
BIORESOURCE TECHNOLOGY
(2019)
Article
Environmental Sciences
Tonatiuh Moreno-Perlin, Angel G. Alpuche-Solis, Ernesto Badano, Claudia Etchebehere, Lourdes B. Celis
GEOMICROBIOLOGY JOURNAL
(2019)
Article
Chemistry, Physical
Aida Tapia-Rodriguez, Estefania Ibarra-Faz, Elias Razo-Flores
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Energy & Fuels
Rodolfo Palomo-Briones, Lourdes B. Celis, Hugo O. Mendez-Acosta, Nicolas Bernet, Eric Trably, Elias Razo-Flores
Article
Chemistry, Physical
Alma Toledo-Cervantes, Francisco Villafan-Carranza, Jorge Arreola-Vargas, Elias Razo-Flores, Hugo Oscar Mendez-Acosta
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Energy & Fuels
Irma Lopez-Gutierrez, Elias Razo-Flores, Hugo Oscar Mendez-Acosta, Lorena Amaya-Delgado, Felipe Alatriste-Mondragon
Summary: The optimum conditions for enzymatic hydrolysis of non-pretreated agave bagasse were determined using two binary mixtures of commercial enzymatic preparations. The mixture of Celluclast 1.5 L and Viscozyme L showed higher reducing sugar concentration and saccharification yield compared to the Cellic(R) Ctec2 and Cellic(R) Htec2 mixture. Synergism between the enzymes in the Celluclast 1.5 L and Viscozyme L mixture was indicated by a higher degree of synergy for enzymatic hydrolysis.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Physical
Jose de Jesus Montoya-Rosales, Rodolfo Palomo-Briones, Lourdes B. Celis, Claudia Etchebehere, Elias Razo-Flores
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Chemistry, Analytical
Luis F. Chazaro-Ruiz, Miguel Olvera-Sosa, Gabriela Vidal, J. Rene Rangel-Mendez, Gabriela Palestino, Fatima Perez, Wei Zhang
Article
Biotechnology & Applied Microbiology
Jack Rincon-Perez, Lourdes B. Celis, Marcia Morales, Felipe Alatriste-Mondragon, Aida Tapia-Rodriguez, Elias Razo-Flores
Summary: The study found that under anaerobic conditions, microalgal hydrolysate can be co-digested with cheese whey to increase methane production. Methane content was higher at alkaline pH, but the methane yield from co-digestion was similar to that at neutral pH.
BIOCHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Rodolfo Palomo-Briones, Jose de Jesus Montoya-Rosales, Elias Razo-Flores
Summary: Microbial communities involved in hydrogen production from enzymatic hydrolysates of agave bagasse were analyzed through 16S rRNA sequencing. The study found that different enzymatic hydrolysates and reactor configurations can influence microbial community diversity and H-2 production rates. Contrary to prevailing theory, a stable environment in continuous stirred-tank reactors favored high-performance H-2 production, with microbial diversity showing an inverse relationship with H-2 production rates.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Jose de Jesus Montoya-Rosales, Aura Ontiveros-Valencia, Diego A. Esquivel-Hernandez, Claudia Etchebehere, Lourdes B. Celis, Elias Razo-Flores
Summary: Microbial communities in dark fermentation continuous systems are influenced by substrate type, concentration, and product accumulation. This study used metatranscriptomics and quantitative PCR to investigate the effect of high organic loading rates on microbial community diversity and expression of key dark fermentative genes. The results showed that the microbial communities consisted of H-2-producing bacteria, homoacetogens, and lactic acid bacteria. Increasing the organic loading rate influenced the abundance of genes and gene transcripts related to H-2 production and homoacetogenesis. Adding silicone oil increased H-2 production and the abundance of related genes and gene transcripts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Dendera Munguia-Aguilar, Hector A. Ruiz, Elias Razo-Flores, Cesar Nieto-Delgado, Edith Cadena-Chamorro, Felipe Alatriste-Mondragon
Summary: The efficiency of enzymatic saccharification of lignocellulosic biomass can be improved by a sequential process of hydrothermal pretreatment followed by enzymatic hydrolysis, resulting in higher release of sugars and methane production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Valeria Fuentes-Santiago, Idania Valdez-Vazquez, Miguel Vital-Jacome, Marcela Zavala-Mendez, Elias Razo-Flores, Julian Carrillo-Reyes
Summary: The natural fermentation of agroindustrial effluents inhibits dark fermentation processes and reduces the availability of carbohydrates, competing with lactic acid bacteria. This study analyzed the effect of carbohydrates and lactate/acetate on hydrogen production, microbial dynamics, and metabolic pathways using model substrates and fermented agro-industrial wastewater. The results showed that lactic acid and acetate were preferred substrates for hydrogen production, achieving higher potential, rate, and yield compared to using only carbohydrates. The study also highlighted the importance of microbial interactions and metabolic profiles for the energetic valorization of fermented agroindustrial effluents through hydrogen production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Casandra Valencia-Ojeda, Jose de Jesus Montoya-Rosales, Rodolfo Palomo-Briones, Virginia Montiel-Corona, Lourdes B. Celis, Elias Razo-Flores
Summary: The study investigates the use of a generic cellulase (Cellulase 50 XL) and a specialized hemicellulase (Viscozyme L) in preparing hydrolysates from agave bagasse for hydrogen production. The combination of Cellulase 50 XL and Viscozyme L significantly increased the release of carbohydrates and chemical oxygen demand from the agave bagasse. Despite being designed for the food sector, Cellulase 50 XL was found to be a cost-effective option for continuous H-2 production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)