Article
Chemistry, Multidisciplinary
Mustafa Wajdi, Khalida Muda, Mohamad Ali Fulazzaky
Summary: This study aimed to evaluate the mass transfer kinetics of chemical oxygen demand (COD) removed from palm oil mill effluent (POME) using stirred cylinder batch reactor (SCBR) under anaerobic conditions. The COD removal efficiency of SCBR reached 77.6% of its maximum efficiency at a hydraulic retention time of 9 days. The resistance of mass transfer for COD removal from POME by SCBR process depends on external mass transfer, and the variation of [kLa]d value is similar to that of [kLa]g value but much higher than that of [kLa]f value.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Anna Zaykovskaya, Marjatta Louhi-Kultanen
Summary: Four different techniques for xylitol crystallization were investigated and compared in terms of their influence on crystal properties. Real-time monitoring and solid characterization methods were used to study crystal size, shape, and distribution. Viscosity and mixing speed were found to play important roles in crystallization kinetics, and the addition of ethanol improved crystal shape and filterability.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Multidisciplinary Sciences
Ebrahim Taghinezhad, Mohammad Kaveh, Antoni Szumny, Adam Figiel, Jose Blasco
Summary: In this research, response surface methodology (RSM) was used to model the response parameters of apple slices dried in a microwave dryer under ultrasonication and blanching pretreatments. The results showed that the independent parameters of microwave power and sample thickness had a significant influence on the response parameters. The use of ultrasonication and blanching pretreatments decreased energy consumption and greenhouse gas emissions, while improving the quality of the samples.
SCIENTIFIC REPORTS
(2023)
Article
Microbiology
Gion Strobel, Birger Hagemann, Christian Truitt Lueddeke, Leonhard Ganzer
Summary: As the interest in a strong hydrogen economy continues to rise, the need to store hydrogen as a raw material or energy carrier becomes increasingly important. Storing hydrogen in deep underground locations can facilitate microbial conversion. Laboratory studies and analysis are vital to predict and examine hydrogen loss. A growth model is required to interpret batch or chemostat experiments and specify microbial growth parameters and hydrogen conversion. This study conducted experiments with methanogens and a hydrogen/carbon dioxide gas mixture in batch reactors. The microbial growth was modeled using a double Monod model, taking into account both phases. The resulting coupled model matched pressure behavior in the reactor and determined microbial growth kinetics.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Chemistry, Applied
Denise Tonato, Thiarles Brun, Luciana Luft, Maicon Sergio Nascimento dos Santos, Fernanda Caroline Drumm, Patricia Grassi, Jordana Georgin, Raquel C. C. Kuhn, Giovani L. L. Zabot, Marcio A. A. Mazutti
Summary: This study developed a strategy to maximize the biomass concentration and lipid accumulation by Nigrospora sp. in submerged fermentation. Through optimizing the media compositions and process variables, the maximum biomass concentration and lipid accumulations reached 40.17 g/L and 21.32 wt% in the bioreactor, which were 2.1 and 5.4 times higher than those in shaken flasks, respectively.
NATURAL PRODUCT RESEARCH
(2023)
Article
Metallurgy & Metallurgical Engineering
Elahe Karami, Laura Kuhar, Andrej Bona, Aleksandar N. Nikoloski
Summary: In-situ recovery faces challenges in low-permeability deposits due to weak interaction between mineral and lixiviant solution. Ultrasonic waves can increase mass transfer by creating intense pressure increases and temperature rises. Experiments showed that optimum conditions for maximum migration of lixiviant ions through synthetic rock samples were achieved with 360W ultrasound power for 24 hours/day. Under these conditions, the highest number of ions moved from the source reservoir to the target reservoir through a core sample with a permeability of 177 mD.
MINERAL PROCESSING AND EXTRACTIVE METALLURGY REVIEW
(2023)
Article
Energy & Fuels
Chin-Tsan Wang, Tzu-Hsuan Lan, Aristotle T. Ubando, Wen-Tong Chong, Alvin B. Culaba, Yung-Chin Yang
Summary: This study investigates the electron transfer mechanism in microbial fuel cells through numerical modeling and experimental validation using two types of bacteria and a nanowire conductive transferring pathway. Results show that the batch-type MFC with nanowire transfer pathway exhibits a higher limiting current density.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Physical
Yonghang Zhou, Haifeng Huang, Haoqi Wang, Qiong Huang, Tian-shun Song, Jingjing Xie
Summary: This study introduced fillers into the Microbial Electrosynthesis (MES) system to improve the performance of the system. The fillers reduced bubble volume, increased gas residence time, and optimized mass transfer rate, providing sufficient substrate supply for the biocatalyst. The presence of fillers significantly enhanced the performance of MES, showing potential as a new and simple strategy for MES reactor improvement.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Riyadh Almukhtar, Sally Hammoodi, Hasan Shakir Majdi, Khalid A. Sukkar
Summary: In this study, heavy waste crude oil was recovered and subjected to thermal cracking reactions. The optimal reaction temperature and operating pressure were found to greatly influence the product distribution, resulting in high-quality liquid fuel with low gaseous and coke formations. The transport processes occurring in the reactor were identified as the key factor for a high-performance thermal cracking process.
Article
Chemistry, Applied
Phillip Roche, Roderick C. Jones, Brian Glennon, Philip Donnellan
Summary: A lab-scale bubble column was studied as an alternative method for low-temperature binary solvent swap, and both theoretical modeling and experimental results confirmed its effectiveness and accuracy in achieving desired evaporation rates and solvent concentration changes.
ORGANIC PROCESS RESEARCH & DEVELOPMENT
(2022)
Article
Acoustics
Yao Yao, Rong Han, Feng Li, Juming Tang, Yang Jiao
Summary: The influence of different NaCl concentrations and ultrasound on salt diffusion and other kinetic parameters in the brining process of tuna was investigated. A 5% brine concentration resulted in the highest yield and the highest salt effective diffusion coefficient.
ULTRASONICS SONOCHEMISTRY
(2022)
Article
Engineering, Chemical
A. G. Knyazeva, A. L. Maslov
Summary: Shale is a sedimentary rock that can be transformed into liquid hydrocarbons and combustible gas through pyrolysis. In situ methods of oil shale thermal processing, which do not require surface extraction of rock, are of particular interest. This study presents a mathematical model that describes the heating and decomposition of oil shale in non-equilibrium conditions, considering the changes in gas pressure due to temperature and composition. The model also allows for the determination of technological parameters to optimize the extraction rate of valuable products.
TRANSPORT IN POROUS MEDIA
(2023)
Article
Engineering, Environmental
Lixue Liu, Zhikai Liu, Shuainan Zhao, Chaoqun Yao, Guangwen Chen
Summary: A novel ultrasonic emulsion-enrichment method is proposed in this study for the separation and enrichment of amphiphilic compounds. The method shows low cost, easy operation, and excellent performance in separation and enrichment processes.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Abdulrahman Bin Jumah, Maryam Malekshahian, Aleksander A. Tedstone, Arthur A. Garforth
Summary: A kinetic model for LDPE hydrocracking was developed, estimating kinetic parameters and mass transfer coefficients from experimental data while considering mass transfer limitations and vapor-liquid equilibrium. The product stream was dominated by naphtha fractions, decreasing with longer reaction times.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Engineering, Environmental
Binlong Liu, Michael Finkel, Peter Grathwohl
Summary: A simple first order approximation equation was derived based on a coupled film and intraparticle diffusion model to model the sorption/desorption kinetics of hazardous compounds in batch experiments. This equation allows for analysis of mass transfer resistances and calculation of characteristic times, which is relevant for planning batch experiments.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
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)