Article
Engineering, Chemical
Justyna Tarapata, Brygida E. Dybowska, Justyna Zulewska
Summary: This study investigated the mechanisms of membrane fouling caused by the deposition of whey protein on the membrane surface during ultrafiltration. Results showed that higher protein content led to greater total hydraulic resistance, with adsorption and concentration polarization dominating the resistance in the initial minutes of filtration.
JOURNAL OF FOOD ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Hui Zou, Ying Long, Liguo Shen, Yiming He, Meijia Zhang, Hongjun Lin
Summary: This study investigated the influence of Ca2+ on HA fouling and demonstrated the potential of Ca2+ addition in mitigating fouling in the coagulation-ultrafiltration process. It was found that increasing Ca2+ concentration led to an increase in filtration flux and a reduction in hydraulic filtration resistance. The effects of Ca2+ addition varied for different resistance components, with a decrease in internal blocking and concentration polarization resistance, but an increase in membrane surface deposit resistance. The main reason for the decreased filtration resistance was the enlarged particle size caused by the Ca2+ bridging effect.
Article
Engineering, Chemical
Mohamed Aslam, Filicia Wicaksana, Mohammed Farid, Anthony Wong, William B. Krantz
Summary: In this study, a transient back-pressure (water hammer) was applied to mitigate fouling in ultrafiltration of whey proteins. The water hammer effect was effective in reducing membrane fouling, with up to 84% flux enhancement achievable depending on operating conditions. However, the effectiveness of water hammer decreased at high transmembrane pressures and high feed concentrations where fouling was more severe.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Esperanza M. Garcia-Castello, Antonio D. Rodriguez-Lopez, Sergio Barredo-Damas, Alicia Iborra-Clar, Jairo Pascual-Garrido, Maria Isabel Iborra-Clar
Summary: Consumers are increasingly aware of the importance of incorporating functional and nutritional foods into their diet, leading to a higher demand for protein and peptide-rich food extracts. Soy protein and its derivatives are particularly emphasized in this trend. Ultrafiltration membranes are used for protein fractionation and concentration, but membrane fouling remains a key limitation caused by the accumulation of macromolecules near the membrane surface.
Article
Engineering, Chemical
Weipeng He, Jiacheng Luo, Yujie Wu, Tianhao Luo, Chen Tang
Summary: This study investigated the use of ballasted flocculation as a pretreatment method for ultrafiltration to improve cake layer structure and mitigate membrane fouling. The results showed that the dosage of coagulant and the type of polyacrylamide greatly influenced cake layer formation and membrane fouling.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Engineering, Chemical
Mengjiao Yan, Kangying Guo, Yue Gao, Qinyan Yue, Baoyu Gao
Summary: This study investigates the coagulation-ultrafiltration integrated process for oily wastewater treatment. It is found that polyaluminum chloride (PAC) is more effective than AlCl3 and Fe based coagulants. The PAC-PDMDAAC coagulation system forms large and loose flocs, indicating efficient removal of oil droplets.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Vedrana Prorok, Dejan Movrin, Natasa Lukic, Svetlana Popovic
Summary: This paper presents an analysis of the fouling of a ceramic membrane by a mixture containing high concentrations of humic acid and colloidal silica during cross-flow ultrafiltration under various operating conditions. The experiments showed that colloidal silica exacerbates fouling and results in lower fluxes compared to the humic acid feed water. However, under certain conditions, lower concentrations of humic acid can lead to reduced fouling and higher fluxes.
Article
Biotechnology & Applied Microbiology
Santhana Krishnan, Mohd Nasrullah, Hesam Kamyab, Noor Suzana, Mimi Sakinah Ab Munaim, Zularisam Ab Wahid, Ismat H. Ali, Reza Salehi, Sumate Chaiprapat
Summary: This study focuses on the separation of xylose reductase (XR) enzyme using a cross-flow ultrafiltration (UF) membrane and investigates the effect of operating parameters and membrane cleaning techniques on the separation performance. The research findings indicate that increasing transmembrane pressure improves the separation efficiency but also leads to fouling and polarization. On the other hand, increasing cross-flow velocity is more effective in fouling control. Moreover, cleaning the membrane surface with an alkaline solution containing 0.1 M sodium hydroxide effectively removes foulants and increases flux recovery.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Article
Polymer Science
Iva Curic, Davor Dolar, Josip Horvat, Katia Grgic
Summary: The influence of textile wastewater secondary effluent on the characteristics of ultrafiltration membranes was investigated, showing changes in membrane properties and the formation of fouling layers, with larger pore size membranes exhibiting a greater decrease in permeate flux during treatment.
Article
Biochemistry & Molecular Biology
Wirginia Tomczak, Ireneusz Grubecki, Marek Gryta
Summary: The study demonstrates the successful use of a ceramic ultrafiltration membrane in producing the desired 1,3-propanediol in a membrane bioreactor. Control of broth pH and the use of NaOH for fouling control are crucial for the stability and efficiency of the fermentation process.
Article
Engineering, Chemical
Mengying Yang, Sarah Lotfikatouli, Yvonne Chen, Tony Li, Hongyang Ma, Xinwei Mao, Benjamin S. Hsiao
Summary: Nanostructured cellulose membranes with excellent antifouling performance and stability are suitable for high-efficient wastewater treatment. Compared with commercial polymeric membranes, cellulose membranes exhibit higher permeation flux and separation efficiency, and can achieve near-total recyclability through washing.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Environmental Sciences
Punika Maneewan, Warayuth Sajomsang, Sudkanueng Singto, Jenyuk Lohwacharin, Benjaporn Boonchayaanant Suwannasilp
Summary: This study modified the surface of PVDF ultrafiltration membranes with tannic acid (TA) and Cu (II) to reduce membrane fouling in AnMBRs, showing that modifying membranes with a certain antibacterial property could improve performance and reduce irreversible fouling.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Eunjoo Koh, Nahyun Cho, Hee Min Park, Yong Taek Lee
Summary: In this study, chemically modified polyvinylidene fluoride (PVDF) hollow fiber membranes with anionic-hydrophilic and hydrophobic materials exhibited excellent properties for separating bacteria and particles. The modified membranes showed high fouling resistance and a higher protein recovery ratio compared to the pristine membrane. The developed membranes can be applied in biopharmaceutical production and removal of proteins, retro viruses, and bacteria.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Anna Malakian, Scott M. Husson
Summary: This study utilized a new approach to pattern membranes and evaluated the effectiveness of a microscale herringbone pattern in reducing protein fouling on polyvinylidene fluoride ultrafiltration membranes through experiments and measurements. The results showed that patterning at low pressure can increase membrane permeability, leading to a lower occurrence of protein fouling.
Article
Engineering, Chemical
Gregor Rudolph-Schopping, Herje Schagerlof, Ann-Sofi Jonsson, Frank Lipnizki
Summary: Although membrane technology is widely used in various industries, fouling of membranes remains a significant challenge. In-situ real-time monitoring through quartz crystal microbalance with dissipation monitoring (QCM-D) can provide valuable information on the kinetics and structure of fouling layers. This study aimed to determine the extent to which observations from QCM-D relate to membrane fouling during ultrafiltration. By comparing fouling during ultrafiltration with QCM-D measurements, the study found that QCM-D findings on the attachment of foulants on polymer films are comparable to membrane fouling. This suggests that QCM-D, along with complementary analytical methods, can offer valuable insights into the development of membrane fouling in industrial wastewater treatment.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Engineering, Chemical
C. Rouquie, A. Szymczyk, M. Rabiller-Baudry, H. Roberge, P. Abellan, A. Riaublanc, M. Frappart, S. Alvarez-Blanco, E. Couallier
Summary: Although membrane filtration for biorefining of microalgae has gained increasing interest, little research has been done on membrane regeneration after fouling by vegetable products. In this study, the use of NaCl solution for precleaning of membranes fouled by microalgae lipid emulsion was investigated. The results showed that NaCl can significantly reduce internal fouling and facilitate subsequent cleaning steps. This work contributes to the development of cost-effective and environmentally friendly cleaning procedures for separation processes in microalgae biorefinery.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Food Science & Technology
Carmen M. Sanchez-Arevalo, Alicia Iborra-Clar, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: This study focused on the solid-liquid extraction of bioactive compounds from two-phase olive mill waste using ultrasound-assisted extraction. The optimal experimental conditions resulted in a recovery of over 6.8 mg/g of bioactive content, which was later purified by ultrafiltration. The research not only added value to the waste, but also reduced its organic load and phytotoxicity, thus protecting the ecosystem of the disposal area.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Magdalena Cifuentes-Cabezas, Carmen Maria Sanchez-Arevalo, Jose Antonio Mendoza- Roca, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: An adsorption/desorption process using Purolite non-ionic resins was investigated to recover phenolic compounds from agroindustry wastewater. The optimal resin concentration and desorption solvent for maximum recovery were determined, and the adsorption mechanisms were characterized using kinetic and isotherm models. The MN200 resin was found to be the most effective adsorbent, achieving a 91% recovery of phenolic compounds.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Magdalena Cifuentes-Cabezas, Claudia F. Galinha, Joao G. Crespo, Maria Cinta Vincent-Vela, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: The presented work aims to solve the problem of large volumes of oil mill wastewater and proposes nanofiltration as a possible second stage treatment. Different membranes were tested and it was found that the NF270 membrane under specific conditions showed the best concentration of phenolic compounds with high permeate flux and low fouling. Furthermore, spectroscopic techniques were used to study membrane fouling and effectiveness of cleaning protocols.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Chemical
Carmen M. Sanchez-Arevalo, Tim Croes, Bart Van der Bruggen, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: Organic-solvent nanofiltration (OSN) has been used to purify and fractionate phenolic compounds in wet olive pomace. Nine commercial OSN membranes were tested, and DuraMem (R) 500, NFX, and NF270 membranes showed satisfactory permeate flux values. Contact angle measurements and AFM analysis provided insight into the interaction between the ethanol/water solution and the membranes. Liquid chromatography coupled to mass spectrometry and/or refractive index detector confirmed low rejection of the target phenolic compounds (less than 10% for hydroxytyrosol) and high rejection of undesired compounds.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Engineering, Environmental
Magdalena Cifuentes-Cabezas, Jose Antonio Mendoza-Roca, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: This study focuses on the valorization of concentrates obtained from membrane processes for the purification of olive oil washing wastewater. The combination of adsorption/desorption process and biological treatment successfully recovered phenolic compounds and eliminated organic matter, providing a solution for circular economy in olive oil processing wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Carmen M. Sanchez-Arevalo, Ane Perez Garcia-Serrano, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: Despite concerns about the environmental impact of wet olive pomace, it actually contains valuable phenolic compounds that can be recovered. This study proposes an integrated process involving ultrasound-assisted extraction, followed by filtration. Different commercial membranes were tested, and satisfactory results were obtained with the UP005 membrane, which provided efficient purification and high permeate flux. Finally, a nanofiltration process using the NF270 membrane achieved the concentration of the purified polyphenols.
Article
Food Science & Technology
Magdalena Cifuentes-Cabezas, Jose Luis Bohorquez-Zurita, Sandra Gil-Herrero, Maria Cinta Vincent-Vela, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: This study focused on the effect of transmembrane pressure and cross flow velocity on the permeate flux of different ultrafiltration membranes for the treatment of olive mill wastewater. Semi-empirical models, statistical methods, and machine learning techniques were used. The series resistance model and combined model accurately represented the experimental data, indicating the contributions of cake layer formation and pore blockage to membrane fouling. Inorganic membranes showed a higher tendency for irreversible fouling. Response surface methodology and artificial neural networks were effective in analyzing the significant variables and their impacts. The study provides a better understanding of the data modeling of different ultrafiltration membranes for olive mill wastewater treatment.
FOOD AND BIOPROCESS TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Magdalena Cifuentes-Cabezas, Alessio Pavani, Maria Cinta Vincent-Vela, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: The olive industry generates a large volume of oil mill wastewater (OMW) and table olive wastewater (TOW), which have high concentrations of organic matter, phenolic compounds, and conductivity. Proper management of these wastewaters is crucial due to their toxic impacts on the environment. Forward osmosis (FO) process was tested to concentrate phenolic compounds for recovery, and two membranes (OsmoF2OTM and HFFO.6) were evaluated. Both membranes demonstrated effective concentration of phenolic compounds with acceptable volume reduction. FO shows promise for concentrating phenolic compounds from OOWW and diluting FTOP simultaneously.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Food Science & Technology
Carmen M. Sanchez-Arevalo, Alicia Iborra-Clar, Maria Cinta Vincent-Vela, Silvia Alvarez-Blanco
Summary: Wet olive pomace can be used as a valuable source of phenolic compounds, which can be efficiently extracted using ethanol/water. Different ultrafiltration membranes were tested to purify the phenolic compounds in the extracts, and UF010104 membrane showed the highest permeate flux and rejection of organic matter, achieving the purification of the phenolic compounds in the permeate stream.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Magdalena Cifuentes-Cabezas, Silvia Alvarez-Blanco, Jose Antonio Mendoza-Roca, Maria Cinta Vincent-Vela, Jose M. Gozalvez-Zafrilla
Summary: Understanding the dynamics of agent interaction is crucial for the operation and design of industrial wastewater management processes. This study developed a theoretical model to predict water flux in two different membranes using a sodium chloride solution as the draw solution. The model considered the contribution of organic compounds to osmotic pressure, as well as the membrane characteristics and module geometry. The results showed variations in flux prediction based on the membrane type, feed solution, and draw solution, with a greater influence of phenolic compounds observed in the cellulose triacetate membrane.
Article
Biotechnology & Applied Microbiology
Magdalena Cifuentes-Cabezas, Maria Cinta Vincent-Velaa, Jose Antonio Mendoza-Roca, Silvia Alvarez-Blanco
Summary: Olive oil production generates wastewater containing phenolic compounds with antioxidant characteristics. Ultrafiltration treatment effectively removes color, turbidity, and organic pollutants from the wastewater, while having little impact on the recovery of phenolic compounds.
FOOD AND BIOPRODUCTS PROCESSING
(2022)
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)