Article
Environmental Sciences
Naveen Patel, Shraddha Shahane, Biswanath Bhunia, Umesh Mishra, Vinod Kumar Chaudhary, Arun Lal Srivastav
Summary: In this study, Bacillus subtilis was used to successfully biodegrade 4-Chlorophenol, with optimization of various parameters and identification of the Levenspiel model as the best fit. The bacteria was immobilized for further degradation, resulting in a maximum degradation efficiency of 45.39%.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Chemical
Yen-Hui Lin
Summary: In this study, the degradation of 4-CP using acclimated sludge was evaluated through batch experiments. The Haldane kinetics showed a better fit to the experimental results than the Monod kinetics. The kinetic parameters obtained from the batch experiments were used as input parameters for the kinetic model system of the packed bed reactor (PBR), which was validated through continuous flow PBR experiments. The approaches presented in this study can be applied to design a PBR for 4-CP treatment in wastewater from various industries.
Article
Agricultural Engineering
Esin Balci, Emilio Rosales, Marta Pazos, Aysun Sofuoglu, Maria Angeles Sanroman
Summary: This study investigated the use of bionanocomposites for the removal of phthalic acid esters from the environment. The immobilization of Bacillus subtilis esterase onto halloysite supported in chitosan and alginate beads showed promise as a green approach. The chitosan-based bionanocomposite exhibited the best performance in batch tests and continuous flow reactor experiments, effectively degrading DEHP and DBP.
BIORESOURCE TECHNOLOGY
(2022)
Article
Energy & Fuels
Shaghayegh Jamshidi, Mohammad Hadi Sedaghat, Ali Amini, Mohammad Reza Rahimpour
Summary: In this study, a steady-state Computational Fluid Dynamics (CFD) model was used to simulate a packed bed reactor for methanol production from natural gas. The model predicted the behavior of gas streams in the reactor tube by accounting for axial and radial dispersion with two-dimensional mass and heat transport equations. A sensitivity analysis was conducted to examine the impact of various parameters on the rate of methanol production in an industrial petrochemical plant. The results showed that shell temperature, operating pressure, flow rate, and carbon source significantly influenced methanol production, while tube length and diameter had little effect.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2023)
Article
Thermodynamics
Zexi Zhang, Ke Ding, Xiaojun Ma, Shuai Tang, Zixin Wang, Haifeng Lu, Weizhong Jiang, Buchun Si
Summary: The hydrodynamic characteristics and microbial enrichment in packed bed reactors (PBRs) for biohydrogen production were investigated in this study. Computational fluid dynamics (CFD) simulation was used to analyze different filling strategies in PBRs. The findings showed that the vertical filling strategy (PBR-V) with evenly distributed velocity magnitude was the optimal hydrodynamic design, resulting in improved reactor performance and maximum hydrogen yield (2.6 mol/mol glucose) through favorable hydrogen production and suppression of hydrogen-consuming reactions. PBR-V also had a quicker start-up and favored biomass attachment compared to horizontal filling strategy (PBR-H). The study provides insight into hydrodynamic and microbial selection mechanisms for efficient biohydrogen production in anaerobic high-rate reactors.
Article
Environmental Sciences
Ponnuswamy Vijayaraghavan, A. Amala Lourthuraj, Mariadhas Valan Arasu, Naif AbdullahAl-Dhabi, Balasubramani Ravindran, Soon WoongChang
Summary: This study focused on screening antibiotics-degrading bacteria from enriched sewage sludge and analyzing their degradation efficiency and optimal conditions in a moving bed bioreactor for the removal of antibiotics and nutrients from wastewater. Selected bacterial strains showed high antibiotic tolerance and efficient degradation rates, indicating the potential of indigenous bacterial communities for survival in challenging environments. The moving bed bioreactor proved to be useful for the simultaneous removal of nutrients and antibiotics from wastewater.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Chemical
Chuang Liang, Yu-Gan Zhu, Bao-Chang Sun, Guang-Wen Chu, Jian-Feng Chen
Summary: A novel rotating packed bed reactor integrated with plasma (plasma-RPB) was developed to enhance wastewater treatment by fully utilizing ozone. The ozone-water mass transfer efficiency of the plasma-RPB with different liquid distributor structures was evaluated. The plasma-RPB exhibited prominent degradation performance, with sulfamethoxazole and TOC removal efficiency reaching up to 87.6% and 82.7%, respectively, within 5 minutes.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Ganesh Swain, R. K. Sonwani, R. S. Singh, Ravi P. Jaiswal, B. N. Rai
Summary: In this study, a sponge-modified carrier, polypropylene-polyurethane foam (PP-PUF), was used in MBBR and PBBR for the biodegradation of 4-CP. Under identical conditions, MBBR showed higher removal efficiencies for 4-CP and COD due to the higher growth of biomass.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Chemical
Chengjie Zhao, Chunlei Pei, Jiachen Sun, Zhi-Jian Zhao, Jinlong Gong
Summary: This study investigates the influence of non-uniform physical fields on the determination of kinetic parameters for endothermic reactions. It is found that low space velocity can minimize temperature gradients within the catalyst bed, while commonly used high space velocity can enlarge temperature inhomogeneity. Additionally, a mixed packing scheme with lower catalyst concentration and higher thermal conductivity is proposed to effectively suppress temperature gradients.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Pranay P. Nagrani, Amy M. Marconnet, Ivan C. Christov
Summary: Gas-liquid flows in packed bed reactors are challenging to predict, especially under microgravity conditions where bubble and pulse flows are predominant. Through simulation and quantitative analysis, different pore-scale mechanisms and dynamic trade-offs between inertia, capillary, and buoyancy forces were observed.
Article
Engineering, Environmental
Vlad-Cristian Sandu, Calin-Cristian Cormos, Ana-Maria Cormos
Summary: This study developed a dynamic multiscale model and a CFD multilayer particle model to simulate and investigate packed bed syngas CLC process. The results showed that larger particle sizes and lower flow rates can reduce pressure drops, while smaller particle sizes contribute to higher energy efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Qiang Cao, Le Sang, Jiacheng Tu, Yushi Xiao, Na Liu, Lidong Wu, Jisong Zhang
Summary: The use of a micro-packed bed reactor (mPBR) in a continuous ozonation system has shown significant improvements in the dissolution rate of ozone and the degradation of refractory organic pollutants. The efficiency of phenol and COD removal reached 100.0% and 86.4% respectively under optimal conditions, demonstrating the promising potential of this approach. Moreover, the conversion of unreacted ozone to oxygen in the system also plays a positive role in promoting the healthy development of aquatic ecosystems.
Article
Chemistry, Physical
Tiziano Delise, Salvatore Sau, Anna Chiara Tizzoni, Annarita Spadoni, Natale Corsaro, Raffaele Liberatore, Tania Morabito, Emiliana Mansi
Summary: Chemical systems for thermal energy storage show promise in addressing solar irradiation fluctuation issues, and this study focused on simulating a configuration using an indirect-packed bed heat exchanger. Despite limitations in heat exchange efficiency, the results demonstrated a good storage efficiency of about 0.7.
Article
Engineering, Chemical
A. Fathiganjehlou, A. Eghbalmanesh, M. W. Baltussen, E. A. J. F. Peters, K. A. Buist, J. A. M. Kuipers
Summary: This research investigates the hydrodynamics of packed beds containing random packings of spherical particles using particle-resolved computational fluid dynamics (PR-CFD) and pore network model (PNM) approaches. The results show that the PNM captures local variations in the bed well. The low computational cost and ability to provide locally resolved data make the PNM a promising approach for the pore-scale modelling of packed bed reactors.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Engineering, Chemical
Jing Ma, Wei Wei, Guotong Qin, Lei Jiang, Ngie Hing Wong, Jaka Sunarso, Shaomin Liu
Summary: This study presents an efficient reactor design that integrates an electrocatalytic packed-bed reactor with a membrane for nitrate removal. The reactor system shows excellent nitrate removal and nitrogen selectivity, highlighting the potential for large-scale nitrate remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Energy & Fuels
Tania Paul, Tarun Kanti Bandyopadhyay, Abhijit Mondal, Onkar Nath Tiwari, Muthusivaramapandian Muthuraj, Biswanath Bhunia
Summary: The use of artificial chemical dyes as coloring agents has harmful effects on human health, leading to the search for natural pigments as alternatives. Microbial pigments with higher stability and productivity are considered potential substitutes for synthetic dyes. Prodigiosin, a natural red pigment, has proapoptotic effects on cancer cell lines and can target multidrug resistant cells with minimal side effects. Exploring the biosynthesis of prodigiosin using biotechnological approaches is of great importance.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Anirban Banik, Mrinmoy Majumder, Sushant Kumar Biswal, Tarun Kanti Bandyopadhyay
Summary: This study utilized a novel approach of polynomial neural network-based group method of data handling combined with modified particle swarm optimization algorithm to predict the permeate flux of rectangular sheet-shaped membrane. The modified PSO algorithm demonstrated better performance in terms of global search ability, computational speed, and stability. Sensitivity analysis identified pore size as the most significant parameter in the optimization process.
Article
Environmental Sciences
Naveen Patel, Shraddha Shahane, Biswanath Bhunia, Umesh Mishra, Vinod Kumar Chaudhary, Arun Lal Srivastav
Summary: In this study, Bacillus subtilis was used to successfully biodegrade 4-Chlorophenol, with optimization of various parameters and identification of the Levenspiel model as the best fit. The bacteria was immobilized for further degradation, resulting in a maximum degradation efficiency of 45.39%.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Energy & Fuels
Ria Majumdar, Umesh Mishra, Nibedita Mahata, Biswanath Bhunia
Summary: Cellulose nanofibre (CNF) is a sustainable and eco-friendly nanostructured material. This study aims to optimize the bleaching process parameters using Taguchi methodology to increase the crystallinity of CNF from I. cylindrica. The results show that sodium chlorite has the greatest effect on CNF extraction, followed by temperature, time, and glacial acetic acid. The highest interaction is found between glacial acetic acid and time. The Taguchi technique predicts the highest optimal yield using sodium chlorite, glacial acetic acid, temperature, and time as parameters.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Ram Balak Mahto, Mukesh Yadav, Muthusivaramapandian Muthuraj, Anil K. Sharma, Biswanath Bhunia
Summary: This study reports the purification and characterization of a pectinase from a mutant strain of Bacillus subtilis. The purified pectinase showed high stability and optimal temperature and pH. It exhibited efficient catalytic activity in citrus peel substrate and juice clarification.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Prashant Bhardwaj, G. P. Biswas, Nibedita Mahata, Susanta Ghanta, Biswanath Bhunia
Summary: The goal of this study is to investigate the protein binding patterns of TCS and proteins from various cancer signaling pathways. Through molecular docking and molecular dynamics simulation, it was found that AIF and JNK proteins may play a key role in TCS-mediated reactions.
Article
Engineering, Chemical
Ramesh Sharma, Pinku Chandra Nath, Sunil Pabbi, Tarun Kanti Bandyopadhyay, Kondi Vanitha, Nibedita Mahata, Biswanath Bhunia, Onkar Nath Tiwari
Summary: The study focused on drying characteristics of Oscillatoria sp. BTA-170 biomass, identifying optimal drying models and aiding in the development of cost-effective dryers. The drying constant increased with temperature, indicating excellent flow properties of the biomass powder.
JOURNAL OF FOOD PROCESS ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Tania Paul, Prashant Bhardwaj, Abhijit Mondal, Tarun Kanti Bandyopadhyay, Nibedita Mahata, Biswanath Bhunia
Summary: In this study, a bioinformatics method was used to identify potential protein targets for Prodigiosin (PG) through docking analysis of 116 proteins selected from the KEGG pathway. Twelve proteins, including HER-2, MEK, and S6K, were found to have strong interactions with PG. The docking results showed that the interaction between PG and S6K was predominantly hydrophobic, while MEK and HER-2 also involved hydrogen bond interactions. The docking approach had a low RMSD value (2.44 angstrom) and a high KISS score (0.5), indicating its significance.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Harsh Vardhan, Soumya Sasamal, Kaustubha Mohanty
Summary: This research described an environment-friendly technique of xylitol production from areca nut hemicellulosic hydrolysate, using an adapted strain of Candida tropicalis. Lime and acid pretreatment were conducted to enhance the activity of xylanase enzymes and improve the efficiency of enzymatic hydrolysis. Fermentation of xylose-rich hemicellulose hydrolysate with Candida tropicalis resulted in the production of xylitol, with about 85% pure xylitol crystals obtained through purification and crystallization.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2023)
Review
Biotechnology & Applied Microbiology
Jayanti Mukherjee, Ramesh Sharma, Prasenjit Dutta, Biswanath Bhunia
Summary: There has been a significant development in artificial intelligence (AI) in recent years, allowing it to penetrate various human domains. This article reviews the current progress in AI, specifically in the medical sector, and discusses the constraints and challenges in its implementation in healthcare. Precision medicine, utilizing multidimensional biological datasets, aims to optimize diagnosis, treatment, and assessment. AI can be applied in several areas within healthcare, including diagnosis and therapy, patient involvement, and administrative tasks. The future potential of AI in risk prediction and the addressing of biases and challenges in delivering effective healthcare AI are also discussed.
BIOTECHNOLOGY AND GENETIC ENGINEERING REVIEWS
(2023)
Article
Biochemical Research Methods
Harsh Vardhan, Soumya Sasmal, Kaustubha Mohanty
Summary: Areca nut husk is a promising low-cost raw material due to its high content of xylose. The sugars can be extracted and transformed into value-added chemicals using fermentation. However, toxic components in the husk hinder the growth of microorganisms. Detoxification techniques such as pH adjustment, activated charcoal, and ion exchange resin can effectively eliminate these inhibitors. This study demonstrates a remarkable removal rate of 99% and an optimum xylitol yield of 0.66 g/g using the detoxified hemicellulosic hydrolysate of areca nut husk.
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY
(2023)
Article
Energy & Fuels
Pinku Chandra Nath, Tarun Kanti Bandyopadhyay, Nibedita Mahata, Onkar Nath Tiwari, Md. Nazneen Bobby, Mikkili Indira, Biswanath Bhunia
Summary: The cyanobacterium BTA 903 isolated from Manipur state of India was identified as Anabaena sp. after phylogenetic analysis. BTA 903 required certain supplements and specific conditions to achieve high cell growth and C-phycoerythrin production. The biomass productivity of Anabaena sp. BTA 903 was found to be 39 mgL(-1) day(-1)after 30 days of incubation. The deactivation study of PE showed different rate constants at different pH and temperature conditions, suggesting its potential for industrial applications.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Rajesh K. Srivastava, Prakash Kumar Sarangi, Krushna Prasad Shadangi, Soumya Sasmal, Vijai Kumar Gupta, Muthusamy Govarthanan, Uttam Kumar Sahoo, Sanjukta Subudhi
Summary: The increase in population, industrialization, and urbanization pose a significant challenge for agriculture. To improve crop productivity, modern agricultural technology such as hybrid seeds, irrigation facilities, fertilizers, and pesticides are adopted, resulting in increased agro-waste. Proper waste management is a problem due to lack of dumping lands and transportation facilities. A systematic utilization of these wastes can promote a clean environment and provide value-added products.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2023)
Article
Food Science & Technology
Sarthak Saxena, Hamsadhwani Vasudevan, Sonia Saini, Soumya Sasmal
Summary: Due to the increase in veganism and the lactose-intolerant population, there is a growing demand for plant-based milk and milk products. Researchers worldwide are working on developing different plant-based milk products to compensate for the lack of protein, starch, and other nutrients. Millets are a significant source of nutrients and a potential source of plant-based milk. This study investigated the impact of soaking and germination on the physicochemical, proximate, adsorptive, antioxidant, antinutrient, and sensory aspects of different millet milks. The findings suggest that combining soaking and germination can enhance the functional properties of millet milk, making it a potential processing technique for nutritious millet milk production.
ACS FOOD SCIENCE & TECHNOLOGY
(2023)