Article
Environmental Sciences
Yuan Gong, Peng Ding, Ming-Jie Xu, Chun-Mei Zhang, Ke Xing, Sheng Qin
Summary: This study isolated a novel halotolerant phenol-degrading yeast strain, SDP-1, from a coastal soil in Jiangsu, China, and identified it as Candida tropicalis based on morphology and genetic sequence analysis. SDP-1 efficiently removes phenol under a wide range of conditions, utilizes various phenol derivatives as carbon sources, and shows high tolerance to salts. Immobilized SDP-1 exhibits enhanced phenol degradation efficiency compared to free cells, making it a potential candidate for phenol-contaminated wastewater and soil treatment in hypersaline environments.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Ion Iliuta, Maria C. Iliuta
Summary: Attaching microbial cells to micro-particles surface can enhance the biodegradation efficiency in packed-bed column bioreactors, especially under low phenol concentrations and liquid velocities.
Article
Energy & Fuels
Dali Kong, Shuai Wang, Kun Luo, Jiahui Yu, Jianren Fan
Summary: The methanation process in a bubbling fluidized bed (BFB) reactor is studied using computational fluid dynamics-discrete element method (CFD-DEM) with thermochemical sub-models. A novel algorithm is developed for bubble identification and statistics. The effects of key operating parameters on bubble behaviors are quantified and the underlying mechanism of mesoscale bubble behaviors is elucidated. The results show that the bubble dynamics can be well captured by the algorithm and the interphase heat and mass transfer can be enhanced by adjusting the operating parameters.
Article
Engineering, Chemical
Keying Ma, Zeneng Sun, Yuanyuan Shao, Jesse Zhu
Summary: The bubble size and rise velocity were investigated in a pilot-scale bubble-induced three-phase inverse fluidized bed. The study found that the bubble size distribution is affected by bubble coalescence and breakup, and proposed a parameter to describe the distribution width. The average bubble size increases with the axial distance and gas velocity until reaching a relatively stable size. The radial distributions of the average bubble size are almost uniform but experience a decreasing trend near the column wall. The bubble rise velocity increases with the bubble size and gas velocity.
Article
Environmental Sciences
N. Benit, A. Amala Lourthuraj, K. Barathikannan, Ashraf Abdel-Fattah Mostafa, Hissah Abdulrahman Alodaini, Mohamed Taha Yassin, Ashraf Atef Hatamleh
Summary: This study analyzed the phenol degradation potential of bacterial laccase and pectinase. Among the tested strains, PD8 and PD22 showed strong phenol degradation ability. Immobilized packed bed column reactor treatment demonstrated high efficiency in phenol degradation and color removal.
ENVIRONMENTAL RESEARCH
(2022)
Article
Biotechnology & Applied Microbiology
Qianqian Zhao, Qian Yu, Xiufeng Wang, Xianjun Li, Yu Li, Longjian Li, Xiaoqiang Wang, Daoyong Yu, Baosheng Ge
Summary: The increased water contamination with phenolic compounds has become a major environmental concern, and this study developed a co-cultured microalgae/microorganism system to efficiently treat phenol and accumulate microalgal biomass. The results show that the co-culture system achieved high phenol removal rates and chlorophyll accumulation compared to monoculture conditions. Transcriptome analysis revealed that the co-cultured system utilized phenol as a carbon source for growth and metabolism. The experimental results also demonstrated that the co-culture system efficiently removed phenol compounds and reduced ammonia nitrogen, total phosphorus, and chemical oxygen demand in wastewater. This research provides a promising approach for treating phenolic compounds and promoting microalgal growth using phenol-containing wastewater.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Environmental Sciences
Yuzhe He, Zhangna Wang, Tianyu Li, Xingxing Peng, Yetao Tang, Xiaoshan Jia
Summary: Candida tropicalis sp. strain has predominant biodegradation capability to phenol compounds, even in high concentration or acidic environment. The study identified differentially expressed genes and reconstructed catabolic pathways, revealing the unique genetic characteristics of the strain. Key phenol-degrading genes were upregulated and a potential carboxymethylenebutenolidase gene was speculated to contribute to the reconstruction of a novel phenol catabolic pathway.
Article
Energy & Fuels
Suyang Pan, Jiliang Ma, Xiaoping Chen, Daoyin Liu, Cai Liang
Summary: This study investigated the premixed combustion of ammonia (NH3) and oxygen (O2) in a fluidized bed using both experimental and numerical methods. The results showed that the combustion occurred in a growing bubble, with quenching observed at the bubble edge and instability at low equivalence ratios. The equivalence ratio significantly affected the ignition delay, flame propagation velocity, and the concentrations of gaseous species. Increasing the bed temperature reduced the ignition delay, while nitrogen as the background fluidizing gas had a negative impact on combustion. The combustion of NH3/air in the bubble phase of a fluidized bed was difficult without a catalyst or co-combustion with an inflammable fuel.
Article
Energy & Fuels
Kiattikhoon Phuakpunk, Benjapon Chalermsinsuwan, Suttichai Assabumrungrat
Summary: This study used computational fluid dynamics to explore a louver baffles arrangement that could reduce bubble coalescence in a bubbling bed gasifier fueled by biomass. The results showed that 10 mm-gap baffles were effective in reducing bubble size and slowing down bubble coalescence, while also providing better gas-solid contact.
Article
Engineering, Chemical
Qiushi Xu, Xiaoping Guan, Raffaella Ocone, Ning Yang
Summary: By applying digital image analysis, we found that the characteristics of bubbles in a wet-particle fluidized bed undergo a two-stage evolution with increasing liquid content. In the first stage, bubble number and uniformity increase while average diameter and aspect ratio decrease. In the second stage, these characteristics shift in the opposite direction. This evolution is similar to reducing particle size in dry-particle fluidization.
Article
Engineering, Chemical
Weijie Yin, Shuai Wang, Rushan Bie
Summary: In this study, a bubble structure-dependent (BSD) model is implemented to consider the bubble effect in a fluidized bed, where the kinetic theory of rough sphere (KTRS) is incorporated to describe the particle collision effect. The frictional contribution at a high solid concertation is taken into account, where the random fluctuation is introduced in the frictional stress to incorporate the mesoscale effect in the frictional regime. Mesoscale effects on frictional solid stress are analyzed. The results demonstrate that the mesoscale effect in the frictional regime leads to a more intensive fluctuation of the stress. In addition, the effects of particle roughness on frictional solid stress and mesoscale parameters are also discussed.
Article
Chemistry, Physical
Brandon Sean Ross, Robert W. M. Pott
Summary: Biohydrogen production via photofermentation has low environmental impact and can be integrated into wastewater treatment systems. However, current production rates are low compared to industrial processes, requiring improvement. One strategy for enhancing productivity is the development of improved photobioreactor systems. This study compared hydrogen productivity of Rhodopseudomonas palustris under different cell conditions, with the fluidized bed PBR achieving the highest specific hydrogen production rate and substrate conversion efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Xuelian Xing, Chao Zhang, Bin Jiang, Yongli Sun, Luhong Zhang, Cedric Briens
Summary: In this study, the multi-phase Eulerian-Eulerian two-fluid method coupled with the kinetic theory of granular flow was used to investigate the hydrodynamics of particle flows in a lab-scale bubbling fluidized bed. The study aimed to improve the distribution of an injected liquid by enhancing the flow of bubbles entering the spray jet cavity. Results showed that adding a fluxtube to a baffle can enhance bubble flows, while baffles help smooth out variations in gas distribution.
Article
Engineering, Chemical
Li Dai, Zhulin Yuan, Lei Guan, Kai Wu, Conghui Gu
Summary: This study investigates the bubble dynamics of wet Geldart-D particles in a wet 2D fluidized bed using digital image analysis. The results show that increasing liquid saturation promotes gas holding capacity of the emulsion phase, while enhanced liquid bridge forces limit bubble growth and promote bubble breakage. Small and irregular bubbles are likely to be observed in wet fluidized beds due to the growing liquid saturation.
CANADIAN JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Energy & Fuels
Niharika Kashyap, Vijayanand S. Moholkar
Summary: The study demonstrated that sonication can enhance the degradation of pyrene by Candida tropicalis, with optimized parameters of pH=6, temperature=33 degrees C, agitation speed=164 rpm, % inoculum=8.07% v/v, and an achieved degradation rate of around 53%. Additionally, the yeast strain was found to tolerate salt concentrations up to 20% NaCl.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Biotechnology & Applied Microbiology
Maria Luisa Alvarado-Gutierrez, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer, Fortunata Santoyo-Tepole, Everardo Curiel-Quesada, Jaime Garcia-Mena, Deifilia Ahuatzi-Chacon
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2017)
Correction
Environmental Sciences
Alberto Cabrera-Orozco, Silvia Patricia Galindez-Najera, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer, Fernando Martinez-Jeronimo
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2017)
Article
Biotechnology & Applied Microbiology
Adriana Dorado-Martinez, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer, Fortunata Santoyo-Tepole, Oswaldo Ramos-Monroy
ENGINEERING IN LIFE SCIENCES
(2017)
Article
Engineering, Environmental
Vania Robles-Gonzalez, Hector M. Poggi-Varaldo, Juvencio Galindez-Mayer, Nora Ruiz-Ordaz
WATER ENVIRONMENT RESEARCH
(2018)
Article
Engineering, Environmental
Vanessa A. Jimenez-Silva, Fortunata Santoyo-Tepole, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2019)
Article
Environmental Sciences
Oswaldo Arturo Ramos Monroy, Nora Ruiz Ordaz, Monica Jazmin Hernandez Gayosso, Cleotilde Juarez Ramirez, Juvencio Galindez Mayer
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Biotechnology & Applied Microbiology
Marco T. Fernandez-Sandoval, Juvencio Galindez-Mayer, Francisco Bolivar, Guillermo Gosset, Octavio T. Ramirez, Alfredo Martinez
MICROBIAL CELL FACTORIES
(2019)
Article
Environmental Sciences
Maria Luisa Alvarado-Gutierrez, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer, Everardo Curiel-Quesada, Fortunata Santoyo-Tepole
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Biotechnology & Applied Microbiology
Isabel Ambriz-Mexicano, Soledad Gonzalez-Juarez, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer, Fortunata Santoyo-Tepole, Cleotilde Juarez-Ramirez, Marcela Galar-Martinez
Summary: This study developed a process using horizontal tubular fixed-bed biofilm reactors to remove contaminants from groundwater and surface water. By immobilizing different microbial communities in granular activated carbon, efficient removal of various micropollutants was achieved.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Merlyn Alejandra Salazar-Huerta, Nora Ruiz-Ordaz, Juvencio Galindez-Mayer, Jaime Garcia-Mena, Cleotilde Juarez-Ramirez
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2019)
Article
Biotechnology & Applied Microbiology
Yiran Qu, Innocent Bekard, Ben Hunt, Jamie Black, Louis Fabri, Sally L. Gras, Sandra. E. Kentish
Summary: This study compares the performance of a nanofiber device and a resin column for antibody capture. The nanofiber device has a larger housing volume and lower binding capacity, but comparable eluate purity to the resin column. It shows high stability, can be used for multiple cycles, and maintains consistent eluate quality when scaled up. The use of a single nanofiber device can significantly reduce costs compared to a resin column, especially when the number of batches is limited.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Brandon Moore, Christos Georgakis, Chris Antoniou, Sarwat Khattak
Summary: Fed-batch cell culture processes are commonly used in biomanufacturing due to their simplicity and applicability in cGMP environments. However, the challenge lies in the changing physiochemical conditions within the bioreactor as the cell density changes. Traditional response surface models (RSMs) are commonly used for optimization but are limited by their use of time-invariant factors. Dynamic RSM (DRSM) models can predict the time-dependent impact of process inputs, allowing for optimization of process operations that change over time.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Lin Li, Yunfan Bai, Chuhua Qi, Yile Du, Xiaoxiao Ma, Yutong Li, Pingping Wu, Shuangli Chen, Sijing Zhang
Summary: A succinic anhydride-modified apple pomace (SAMAP) was synthesized to address environmental issues caused by the accumulation of apple pomace and effectively treat heavy metal ions. SAMAP exhibited high adsorption capacity for Cu(II) and Pb(II), suggesting its potential application in wastewater treatment.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Peter Satzer
Summary: Water for injection (WFI) production in the biopharmaceutical industry consumes excessive amounts of water and energy. Recycling buffers can potentially save up to 90% of resources, but achieving the full theoretical potential is impossible when a risk-aware design is used. Universal risk-based assessment is important for regulatory authorities to consider the implementation of such a strategy.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Gaoya Sun, Lingkai Jin, Guangxue Wang, Xiaoge Wang, Jin Huang
Summary: In this study, heterologous expression and homologous overexpression of ABC transporter proteins AatA and MdlB were found to improve butyric acid production in C. tyrobutyricum. The overexpression of these proteins upregulated the expression levels of key enzymes in the acetate synthesis pathway and promoted the synthesis and secretion of acetic acid. Additionally, the increase in ATPase activity facilitated sugar utilization, induced extracellular secretion of acetate, and shortened fermentation periods.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Taiki Okamura, Rina Aritomi, Takuya Matsumoto, Ryosuke Yamada, Hidehiko Hirakawa, Hiroyasu Ogino
Summary: In this study, proline was introduced to improve the stability of putidaredoxin reductase (PdR) in the Pseudomonas putida cytochrome P450 system. It was found that PdR_T221P had a longer half-life at high temperatures compared to wild-type PdR, but a shorter half-life in the presence of methanol. Molecular dynamics simulations supported these findings.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Yuying Hu, Xiaofan Wang, Shihao Zhang, Zimu Liu, Tengfang Hu, Xin Wang, Xiaoming Peng, Hongling Dai, Jing Wu, Fengping Hu
Summary: This study investigates the effect of iron-carbon micro-electrolysis (ICME) materials on high-solid anaerobic digestion (HSAD). The results show that ICME materials promote methane production in HSAD by increasing the attachment area of microorganisms and facilitating symbiotic metabolism of certain bacterial species. This study provides new insights into microbial mechanisms and enhances our understanding of ICME material enhancement in HSAD.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Jibao Liu, Yufeng Xu, Yuansong Wei
Summary: This study investigated the role of sludge rheology in anaerobic digestion (AD) and found that rheological properties increased with the increase of solid content, resulting in a negative effect on methane production. An extended ADM1 model revealed that enhanced sludge rheological properties increased mass diffusion resistance and reduced uptake rate of acetate.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Xiaoyan Liu, Zongze Chen, Dewen Kong, Xinying Zhang, Chuanhua Wang, Yongqi Wang
Summary: This study explored the role of intracellular and extracellular enzymes of Acinetobacter baumannii and Talaromyces sp. in the degradation of crude oil. The extracellular enzymes of Talaromyces sp. were more effective in degrading n-alkanes, while those of Acinetobacter baumannii had a better effect on aromatic hydrocarbons. The degradation enzyme systems of both bacteria and fungi complemented each other, improving the overall degradation ability.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Jing Dong, Lingli Xu, Yuxiang Liu, Li Ren, Ke Yuan
Summary: The utilization of biochar-immobilized microorganisms is an effective method for eliminating phenol from water. The high susceptibility of bacteria to environmental factors is a challenge for practical implementation. In this study, biochar was used to reduce microbial susceptibility and enhance phenol removal. The addition of biochar altered the dominant species of phenol-degrading bacteria and response surface analysis indicated the significant influence of biochar pyrolysis temperature and experimental temperature on phenol removal rate.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Zibin Pan, Mengying Liu, Zuliang Chen
Summary: This study successfully removed metalloids and heavy metals from acid mine drainage (AMD) using bio-synthesized Fe/Cu nanoparticles (Fe/Cu NPs). The Fe/Cu NPs showed high removal capacities and the presence of organic substances contributed to their stability.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Guangbing Liu, Han Zhang, Jincan Huang, Lu Zhang, Teng Zhang, Xuemin Yu, Weijing Liu, Chunkai Huang
Summary: This study investigated the effect of Fenton pre-treatment on the treatment efficiency of printing and dyeing wastewater (PDW) using two anaerobic/aerobic-membrane bioreactors (A/O-MBRs). The results showed that Fenton pre-treatment significantly improved the removal efficiency of COD and AOX in PDW, and reduced membrane fouling. The Shannon indices and metagenomics analysis indicated that the microbial diversity in anaerobic flocs was higher than that in aerobic flocs, and EC3.1.1.45 and pcaI were identified as key functional genes.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Lidia Borgosz, Duygu Dikicioglu
Summary: The Industrial Internet of Things (IIoT) is a system that connects devices and provides real-time insight into industrial processes. However, the complexity and regulatory requirements of the biomanufacturing sector make it challenging to implement IIoT. There is a need for universal solutions to overcome this challenge and advance the field of biomanufacturing.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Yajie Li, Weikang Kong, Yuyao Zhang, Huarui Zhou, Hongbo Liu, Salma Tabassum
Summary: In this study, the iron-carbon multi-micro electric field coupling anaerobic co-digestion technique was used to treat coal gasification wastewater (CGW). The experimental results showed that under optimal operating conditions, this technique can significantly reduce the toxicity of the wastewater and achieve high removal efficiencies. Additionally, the analysis of microbial communities revealed that the coupling system promotes direct interspecies electron transfer.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)
Article
Biotechnology & Applied Microbiology
Aparecido Nivaldo Modenes, Debora Gozzi Fernandes, Daniela Estelita Goes Trigueros, Matheus Guilherme Amador, Fernando Rodolfo Espinoza-Quinones, Taysa de Souza Braniz, Adilson Ricken Schuelter, Glacy Jaqueline da Silva, Lucimar Pereira Bonett
Summary: This study aimed to systematically remove organic pollutants from raw dairy wastewater with high concentrations of COD, TOC, and TN using Poterioochromonas malhamensis algae strains. The results showed that the biomass yield rate using FP-PBRs was 10% higher than tubular PBRs, and the organic pollution in wastewater was significantly reduced with a decrease of about 98% in COD, 95% in TN, and 92% in TOC.
BIOCHEMICAL ENGINEERING JOURNAL
(2024)