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Tytuł:
In Vitro Characterization of Fluted Pumpkin Leaf Protein Hydrolysates and Ultrafiltration of Peptide Fractions: Antioxidant and Enzyme-Inhibitory Properties
Autorzy:
Famuwagun, Akinsola A.
Alashi, Adeola M.
Gbadamosi, Saka O.
Taiwo, Kehinde A.
Oyedele, Joseph D.
Adebooye, Odunayo C.
Aluko, Rotimi E.
Powiązania:
https://bibliotekanauki.pl/articles/1363312.pdf
Data publikacji:
2020
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Tematy:
fluted pumpkin leaf
protein hydrolysates
membrane ultrafiltration
antioxidant activity
antidiabetic activity
antihypertensive activity
Opis:
Hydrolysates were produced using Alcalase (AH), chymotrypsin (CH), pepsin (PH), and trypsin (TH), and also fluted pumpkin leaf protein isolate (FLI) as a substrate. AH had the lowest degree of hydrolysis (16.37%) but exhibited overall superior antioxidant and enzyme inhibitory properties. Therefore, it was fractionated by membrane ultrafiltration to give <1, 1-3, 3-5, 5-10, and >10 kDa peptide fractions. Gel permeation chromatography showed that the molecular weight of the FLI was 19.77 kDa and that of the hydrolysates was below 7.5 kDa. The hydrolysate peptides had a high content of hydrophobic amino acids but low levels of sulfur-containing amino acids, when compared to protein of FLI. Peptide sequence analysis showed that the hydrolysates consisted of dipeptides, tripeptides, and tetrapeptides with molecular weights below 500 Da. The hydrolysates were also stronger inhibitors of linoleic acid oxidation, α-amylase, α-glucosidase, and angiotensin converting enzyme (ACE) than FLI. Among the fractions, the <1 and 1-3 kDa were the most effective free radical scavengers and metal chelators in addition to their strong inhibitory activities against α-amylase, α-glucosidase, and ACE. We conclude that the AH and low molecular weight peptide fraction (<3 kDa) could find applications in formulating foods with various bioactive properties.
Źródło:
Polish Journal of Food and Nutrition Sciences; 2020, 70, 4; 429-443
1230-0322
2083-6007
Pojawia się w:
Polish Journal of Food and Nutrition Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrafiltration membranes from polysulfone and sulfonated polysulfone in metal ions dialysis enhanced by polyelectrolyte
Autorzy:
Poźniak, G.
Powiązania:
https://bibliotekanauki.pl/articles/346903.pdf
Data publikacji:
2006
Wydawca:
Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Tematy:
polysulfone
ultrafiltration membrane
metal dialysis
polymer-metal complexes
Opis:
The dialysis of metal ions including Mg(II), Ni(II) and Zn(II) through ultrafiltration membranes made of polysulfone and sulfonated polysulfone was enhanced by sodium salt of poly(acrylic acid) diluted in the receiving compartment. In experiments, concentration of Mg(II), Ni(II) and Zn(II) in the feed solution was equal to 10-3 mol/dm3, concentration of polymer in the receiving solution was equal to 10-2 mol/dm3, and pH = 9. In the presence of complexing polymer, concentration of all metal ions in the receiving solution is higher than 50% for the polysulfone membrane and increases to almost 100% for the sulfonated polysulfone membrane. This effect is due to a cation-exchange property of the sulfonated polysulfone membrane.
Źródło:
Ars Separatoria Acta; 2006, 4; 50-56
1731-6340
Pojawia się w:
Ars Separatoria Acta
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fabrication and Characterization of Polyphenylsulfone/Titanium Oxide Nanocomposite Membranes for Oily Wastewater Treatment
Autorzy:
Al-Jadir, Thaer
Alardhi, Saja Mohsen
Alheety, Mustafa A.
Najim, Aya A.
Salih, Issam K.
Al-Furaiji, Mustafa
Alsalhy, Qusay F.
Powiązania:
https://bibliotekanauki.pl/articles/2202289.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
PPSU
polyphenylsulfone
TiO2
nanoparticles
ultrafiltration membrane
oily wastewater treatment
antifouling
Opis:
Polyphenylsulfone (PPSU) membranes are critical for numerous applications, including water treatment, oil separation, energy production, electronic manufacturing, and biomedicine because of their low cost; regulated crystallinity; and chemical, thermal, and mechanical stability. Numerous studies have shown that altering the surface characteristics of PPSU membranes affects their stability and functionality. Nanocomposite membranes of PPSU (P0), PPSU-1%TiO2 (P1), and PPSU-2% TiO2 (P2) were prepared using the phase inversion method. Scanning electron microscopy and thermal analysis were performed to determine the contact angle and mechanical integrity of the proposed membranes. The results showed that the membranes contained channels of different diameters extending between 1.8 μm and 10.3 μm, which made them useful in removing oil. Thermal measurements showed that all of the PPSU membranes were stable at a temperature of not less than 240 °C, and had good mechanical properties, including tensile strength of 7.92 MPa and elongation of 0.217%. These properties enabled them to function in a harsh thermal environment. The experimental results of oil and water separation and BSA solution fouling on membrane P2 showed a 92.95% rejection rate and a flux recovery ratio of 82.56%, respectively, compared to P0 and P1.
Źródło:
Journal of Ecological Engineering; 2022, 23, 12; 1--13
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Usuwanie kwasów halogenooctowych w zintegrowanym procesie biodegradacja-ultrafiltracja z zastosowaniem enzymatycznych membran kapilarnych
Removal of haloacetic acids by the integrated process biodegradation-ultrafiltration involving enzymatic capillary membranes
Autorzy:
Kowalska, M.
Powiązania:
https://bibliotekanauki.pl/articles/237159.pdf
Data publikacji:
2011
Wydawca:
Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
Tematy:
kwasy halogenooctowe
biodegradacja
enzymatyczne membrana ultrafiltracyjna
haloacetic acids
biodegradation
enzymatic ultrafiltration membrane
Opis:
Przedstawiono wyniki badań nad usuwaniem pięciu wybranych kwasów halogenooctowych (HAA) z modelowego roztworu wodnego w procesie biodegradacja-ultrafiltracja. Badania przeprowadzono w reaktorze z kapilarnymi membranami ultrafiltracyjnymi, na powierzchni których unieruchomiono enzymy rozkładające HAA. Zostały one wyizolowane ze szczepów bakterii z rodzajów Acinetobacter, Arthrobacter, Pseudomonas oraz Bacillus, wyodrębnionych z osadu czynnego, zaadaptowanego do rozkładu HAA. Roztwór modelowy HAA składał się z mieszaniny MCAA, DCAA, TCAA, MBAA i DBAA o zawartości 1 g/m3 każdego z nich. Otrzymane wyniki pozwoliły na wyznaczenie najkorzystniejszych parametrów operacyjnych procesu. Optymalne ciśnienie transmembranowe wynosiło 0,075 MPa, a liniowa prędkość przepływu roztworu modelowego - 0,75 m/s. Po 3 h prowadzenia procesu w takich warunkach z wody modelowej zostały całkowicie usunięte kwas monochlorooctowy i monobromooctowy, a po 4 h pozostałe kwasy. Skrócenie wyznaczonego czasu kontaktu można uzyskać zwiększając powierzchnię aktywną membran, co będzie przedmiotem dalszych prac z tego zakresu.
Five haloacetic acids (HAA) of choice were removed from a model solution in the course of the integrated process biodegradation-ultrafiltration. Experiments were performed in a reactor containing capillary ultrafiltration membranes with HAA-degrading enzymes immobilized on their surfaces. The enzymes had been isolated from bacterial strains of the genera Acinetobacter, Arthrobacter, Pseudomonas and Bacillus separated from active sludge adapted to HAA degradation. The model HAA solution was a mixture composed of MCAA, DCAA, TCAA, MBAA and DBAA (each in the amount of 1 g/m3). Based on the results obtained, the most advantageous operating parameters of the process were determined. Optimal transmembrane pressure amounted to 0.075 MPa, linear flow velocity of the model solution being 0.75 m/s. Under such conditions, complete removal of monohaloacetic and monobromoacetic acids was achieved after 3 hours, and that of the other acids after 4 hours of the process. The time of contact can be reduced by increasing the active surface area of the membranes, but this issue will be dealt with in a future study.
Źródło:
Ochrona Środowiska; 2011, 33, 4; 49-51
1230-6169
Pojawia się w:
Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie membran z tworzyw syntetycznych do czyszczenia soku dyfuzyjnego
Autorzy:
Regiec, P
Powiązania:
https://bibliotekanauki.pl/articles/828197.pdf
Data publikacji:
2004
Wydawca:
Polskie Towarzystwo Technologów Żywności
Tematy:
ultrafiltracja
membrany ultrafiltracyjne
filtracja membranowa
polichlorek winylu
tworzywa sztuczne
oczyszczanie
sok dyfuzyjny
ultrafiltration
ultrafiltration membrane
membrane filtration
polyvinyl chloride
plastic
cleaning
diffusion juice
Opis:
Próby soku dyfuzyjnego o różnej jakości poddano ultrafiltracji w skali laboratoryjnej za pomocą membran z azotanu celulozy (CN) i polichlorku winylu (PCV). W sokach dyfuzyjnych i uzyskanych filtratach oznaczono zawartość: suchej substancji, sacharozy, cukrów redukujących oraz azotu a–aminokwasowego, a także lepkość. Obliczono czystość soków i efekt oczyszczania. Stwierdzono, że w wyniku ultrafiltracji soków, za pomocą membran z azotanu celulozy (CN) i polichlorku winylu (PCV) zawartość sacharozy i cukrów redukujących nie zmieniła się. Soki po ultrafiltracji charakteryzowały się mniejszą zawartością azotu a-aminokwasowego niż soki dyfuzyjne, przy czym filtracja przez membranę CN umożliwiła oddzielenie tych substancji w większym stopniu niż filtracja przez membranę PCV. Lepkość soków po filtracji była mniejsza w zakresie 0,7–1,8 mPa⋅s (membrana CN) i 0,5–1,7 mPa⋅s (membrana PCV) i była zbliżona do lepkości czystych roztworów sacharozy o podobnym stężeniu. Membrana PCV charakteryzowała się większym strumieniem permeatu, zwłaszcza w początkowej fazie filtracji, niż membrana CN. Im większa była czystość i mniejsza lepkość soku dyfuzyjnego, tym strumień permeatu był większy. Zastosowanie filtracji membranowej umożliwiło oczyszczenie soków o złej jakości, co w warunkach przemysłowych jest najczęściej niemożliwe. Soki otrzymane po filtracji przez membranę z azotanu celulozy charakteryzowały się lepszą jakością niż soki po filtracji przez membranę z polichlorku winylu.
Samples of diffusion juice showing varying quality were filtrated using an ultrafiltration process in a laboratory. The process was carried out using membranes made of cellulose nitrate (CN) and polyvinyl chloride (PVC). In the diffusion juices and filtrates obtained there were assayed the contents of dry mass, sucrose, reducing sugars, and α-aminoacid nitrogen, as well as viscosity. The juice purity level achieved and the final purification effect were calculated. It was stated that, owing to the filtration with cellulose nitrate (CN) and polyvinyl chloride (PVC) membranes, the content of sucrose and reducing sugars remained unchanged. After the ultra-filtration the juices had a smaller α-aminoacid content compared with the diffusion juices, and these substances were more accurately separated when filtrated through a CN membrane than through a PCV membrane. The viscosity of juices decreased by 0.7–1.8 mPa⋅s after the completed filtration with CN membranes, and by 0.5–1.7 mPa⋅s when filtrated using PVC membranes; this parameter was close to the viscosity of pure sucrose solutions of a similar concentration value. A PVC membrane was characterized by a greater flux of permeate than a CN membrane, especially in the initial phase of the filtration. The greater the purity and lower the viscosity of the diffusion juice, the greater the permeate flux. The application of membrane filtration made it possible to purify juices of bad quality, which are very hard to purify under industrial conditions. Juices filtered through a cellulose nitrate membrane were characterized by a better quality compared with the juices filtered through a polyvinyl chloride membrane.
Źródło:
Żywność Nauka Technologia Jakość; 2004, 11, 2; 121-133
1425-6959
Pojawia się w:
Żywność Nauka Technologia Jakość
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of reactive dyes from aqueous solutions using ultrafiltration membranes
Autorzy:
Ahmed, Arif Eftekhar
Majewska-Nowak, Katarzyna
Grzegorzek, Martyna
Powiązania:
https://bibliotekanauki.pl/articles/2032851.pdf
Data publikacji:
2021
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
reactive dye
ultrafiltration membrane
water solution
dye removal
barwnik reaktywny
membrana ultrafiltracyjna
roztwór wodny
usuwanie barwnika
Opis:
The removal of five reactive dyes varying in molecular weight (Reactive Orange 16, Remazol Brilliant Blue R, Reactive Orange 20, Reactive Black 5, Reactive Red 120) was evaluated by using flat ultrafiltration membranes made of polyethersulfone (PES) and regenerated cellulose (C) characterized by various cut-off values (5, 10, and 30 kDa). The ultrafiltration process was performed in a dead-end mode under the transmembrane pressure range of 0.05–0.2 MPa. Dye concentration in model solutions was equal to 100 mg/dm3. The separation efficiency of all tested dyes was strongly dependent on the membrane type and the membrane cut-off, as well as on the applied pressure. Unexpectedly, the molecular weight of the tested reactive dyes had a minor impact on the dye removal effectiveness. The ultrafiltration membranes made of polyethersulfone and regenerated cellulose can be used in reactive dye removal on the condition that the membrane cut-off is not higher than 10 kDa. The PES and C membranes enable the separation of reactive dyes by 80–97%, and 45–89%, respectively.
Źródło:
Environment Protection Engineering; 2021, 47, 3; 109-120
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The application of ultrafiltration for separation of glycerol solution fermented by bacteria
Autorzy:
Tomczak, W.
Gryta, M.
Powiązania:
https://bibliotekanauki.pl/articles/779520.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ultrafiltration
fouling
ceramic membrane
glycerol fermentation
Opis:
A biotechnological synthesis generated a fermentation broth containing the dissociated forms of organic compounds and residual mineral salts. An effective method of selective removal of the ionic species and organic compounds from solutions comprises nanofiltration and reverse osmosis. Ultrafiltration (UF) was used in this work as a pre-treatment method for the preparation of feed for these processes. The UF study was carried out with a real broth, which was obtained using Citrobacter freundii bacteria for the fermentation of glycerol solutions, resulting in the UF permeate with turbidity below 0.1 NTU. However, a significant decline of the permeate flux was observed during the UF process. The influence of the transmembrane pressure on the fouling intensity of used ceramic membranes was investigated. A periodical membrane cleaning was carried out by rinsing with water and a 1 wt % solution of sodium hydroxide. The applied cleaning procedures permitted to restore the initial permeate flux.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 3; 115-120
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of Membrane Techniques in Swimming Pool Water Treatment
Autorzy:
Łaskawiec, E.
Madej, M.
Dudziak, M.
Wyczarska-Kokot, J.
Powiązania:
https://bibliotekanauki.pl/articles/952481.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
pressure membrane processes
ultrafiltration
nanofiltration
toxicological assessment
Opis:
The paper has determined the suitability of membrane processes (UF ultrafiltration, UF, and nanofiltration, NF) for the purification of waste streams, so-called backwash water, obtained from washing filtration beds in a swimming pool water system. The backwash water samples were taken from the circuits located in two indoor facilities with a different purpose of the basins. Moreover, the samples were characterized by varying quality, as described by selected physicochemical parameters (such as turbidity and ultraviolet absorbance UV254). Commercial membranes were used for the tests. The transport-separation properties of the membranes were determined based on the volumetric flux of the permeate. In addition, backwash water samples before and after the membrane process were subjected to toxicological assessment using the Microtox® screening test. The performed processes contributed to a significant reduction in turbidity and the value of UV254 ultraviolet absorbance, both in the ultrafiltration and nanofiltration processes. Whereas, significant differences in transport properties were noted within individual processes. A great influence of backwash water quality, including physicochemical parameters, on the course and results of the membrane filtration processes was demonstrated. In all of the nanofiltration cycles carried out, the removal of the toxic properties of the backwash water with respect to bacteria in the Microtox® test was found. Nevertheless, samples with high values of resultant physicochemical parameters after the ultrafiltration process were still characterized by high toxicity. Pressure membrane processes show high effectiveness in the removal of contaminants from backwash water. However, it is necessary to introduce supporting processes aimed at reducing membrane pore blocking by deposits and organic compounds, and in the case of ultrafiltration, assuring the safety of the purified stream in terms of the toxicological effect.
Źródło:
Journal of Ecological Engineering; 2017, 18, 4; 130-136
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Chemical composition and properties of spray-dried sugar beet concentrate obtained after ultrafiltration of diffusion juice
Autorzy:
Regiec, P.
Kita, A.
Boruczkowska, H.
Drożdż, W.
Powiązania:
https://bibliotekanauki.pl/articles/779047.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ceramic membrane
ultrafiltration
diffusion juice
concentrate
spray drying
Opis:
Ultrafiltration of diffusion juice is a method that can reduce environmental pollution during the production of sugar. A by-product (concentrate) of ultrafiltration contains a large amount of sucrose, but due to its properties, it is difficult to manage. The aim of this study was to determine the effects of the temperature used during drying of diffusion juice concentrates on the content of certain components and characteristics of resultant preparations. Diffusion juice obtained from one of the Polish sugar plants was subjected to ultrafiltration and the obtained concentrates were dried in a spray dryer. In the dried samples, the following parameters were analyzed: dry mass, sucrose, total ash, protein, crude fiber and color. It has been declared that the degree of concentration and drying temperature influenced the chemical composition and the properties of the dehydrated diffusion juice concentrates. An increase in drying temperature was accompanied by the increased content of dry mass, protein, ash and fiber content in the preparations. The greater the degree of juice concentration, the greater was the content of dry mass, ash, and fiber. Inversely, the greater the degree of juice concentration, the lower the content of sucrose. The brightest color of the dehydrated product was observed at the drying temperature of 200°C. Spray-drying may be used for waste management after the diffusion juice membrane filtration, and the resultant preparations might be used in the production of feedstuff or food industry in general e.g. as sucrose source, in fermentation processes or in microorganisms propagation.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 1; 134-137
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The chemical cleaning of ceramic membrane used in UF
Autorzy:
Tomaszewska, M.
Białończyk, L.
Powiązania:
https://bibliotekanauki.pl/articles/779109.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ultrafiltration
ceramic membrane
whey; broth
fouling
chemical cleaning
Opis:
Ultrafiltration (UF) is one of the membrane processes which is mostly used in the dairy industry for the separation and concentration of whey components or fermentation broth. Fouling of UF membranes in the food industry is primarily due to a deposition of microorganisms, proteins, fats and minerals on the membrane surface. Thus, cleaning of the membranes is an essential step of UF separation. The results from investigations of chemical cleaning of a ceramic UF membrane fouled by precipitation of whey components and yeast contained in the fermentation broth are presented. The effect of cleaning procedure on the degree of permeability restoration by the fouled membrane was studied. The results demonstrated that a combination of sodium hydroxide, phosphoric acid and sodium hypochlorite as a disinfectant could be successfully used to achieve an optimum recovery of the membrane properties.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 3; 105-109
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ceramic membrane fouling in ultrafiltration process of chicken egg white aqueous solution
Autorzy:
Borysiak, M.
Gabruś, E.
Powiązania:
https://bibliotekanauki.pl/articles/185007.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
ultrafiltration
ceramic membrane
chicken egg white
fouling
membrane transport resistance
ultrafiltracja
membrana ceramiczna
Opis:
This paper presents an experimental study on chicken egg white solution ultrafiltration, where membrane fouling has been the main point of concern. Separation process has been performed with a 150 kDa tubular ceramic TiO2/Al2O3 membrane. The operating parameters have been set as follows: transmembrane pressure 105–310 kPa, cross-flow velocity 2.73–4.55 m/s, pH 5 and constant temperature of 293 K. Resistance-in-series model has been used to calculate total resistance and its components. The experimental data have been described with four pore blocking models (complete blocking, intermediate blocking, standard blocking and cake filtration). The results obtained show that the dominant fouling mechanism is represented by cake filtration model.
Źródło:
Chemical and Process Engineering; 2018, 39, 3; 295--308
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zastosowanie procesu ultrafiltracji do podczyszczania wód opadowych
Application of the ultrafiltration process to pretreat rainwater
Autorzy:
Marszałek, Anna
Dudziak, Mariusz
Powiązania:
https://bibliotekanauki.pl/articles/127439.pdf
Data publikacji:
2020
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
wody opadowe
ultrafiltracja
techniki membranowe
rainwater
ultrafiltration
membrane techniques
Opis:
Celem badań była ocena możliwości zastosowania procesu ultrafiltracji do oczyszczenia wybranych wód opadowych pochodzących z dachu domku jednorodzinnego z miasta Wodzisław Śląski. Proces membranowy prowadzono w komorze ciśnieniowej amerykańskiej firmy Osmonics typu GH-100-400 o pojemności 350 cm3 zaopatrzonej w mieszadło magnetyczne zapewniającej warunki dead-end. W badaniach zastosowano cztery płaskie membrany ultrafiltracyjne o symbolach MT, ST, V3 i BN różniące się materiałem membranotwórczym i graniczną masą molową (MWCO). W trakcie filtracji ciśnieniowej wyznaczono zależność objętościowego strumienia permeatu od czasu prowadzenia procesu. Określono również właściwości transportowe stosowanych membran dla wody zdejonizowanej, grubość membrany oraz kąt zwilżalności. Efektywność procesu oceniano również w oparciu o zmianę ładunku zanieczyszczeń organicznych, takich jak ChZT, OWO, OW, NW, barwę oraz absorbancję UV254. Na podstawie otrzymanych wyników badań można stwierdzić, że najlepszą membraną pod względem własności transportowych była membrana ST wykonana z polieterosulfonu (10 kDA), chociaż w przypadku tej membrany zjawiska foulingu było najbardziej intensywne. Uzyskano również wysokie usunięcie zanieczyszczeń organicznych oraz barwy wód opadowych.
The aim of the study was to assess the applicability of the ultrafiltration process for the treatment of selected rainwater from the roof of a detached house in the city of Wodzislaw Slaski. The membrane process was carried out in a pressure chamber produced by Osmonics, an American company, type GH-100-400 with a capacity of 350 cm3 equipped with a magnetic stirrer providing dead-end conditions. Four flat ultrafiltration membranes with PT, PW, V3, BN symbols and of different membrane material and MWCO were used. During the pressure filtration, the relationship between the volumetric permeate flux and the time of the process was determined. The transport properties of the applied membranes for deionized water, membrane thickness and the angle of wettability were also determined. The effectiveness of the process was also evaluated based on the change in organic pollutants load, i.e. COD, TOC, TC, IC, colour and absorbance in UV254. Based on the obtained test results, it was found that the best membrane in terms of transport properties was the PES membrane (cut-off 10 kDa). However, in the case of this membrane, the phenomenon of fouling was the most intense. It was also obtained high removal of organic impurities and rainwater colour.
Źródło:
Proceedings of ECOpole; 2020, 14, 1; 107-114
1898-617X
2084-4557
Pojawia się w:
Proceedings of ECOpole
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrafiltracja odpadowej solanki z przetwórstwa ryb
Ultrafiltration of waste brine from fish processing
Autorzy:
Kuca, M.
Szaniawska, D.
Powiązania:
https://bibliotekanauki.pl/articles/2070784.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ultrafiltracja
odpadowa solanka
membrany ceramiczne
ultrafiltration
ceramic membrane
waste brine
Opis:
W pracy przedstawiono wyniki badań ultrafiltracyjnego uzdatniania solanki pochodzącej z przetwórstwa ryb. Do badań zastosowano membranę ceramiczną o zdolności rozdzielczej 150 kDa. Analizowano i oceniano zależność stopnia zatrzymania białka ogólnego, tłuszczu i chlorku sodu oraz wydajności procesu od ciśnienia transmembranowego i pH roztworów poddawanych ultrafiltracji.
Research results dealing with ultrafiltration of waste brine form fish processing are presented in the paper. The ceramic membrane with 150 kDa cut-off was used as a separation medium. Total protein, fat and sodium chloride rejection as well as permeate flux versus trans-membrane pressure and pH of feed were analyzed and discussed.
Źródło:
Inżynieria i Aparatura Chemiczna; 2009, 5; 60-61
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Treatment of Pool Water Installation Washings in A Flocculation/Ultrafiltration Integrated System
Autorzy:
Łaskawiec, E.
Dudziak, M.
Wyczarska-Kokot, J.
Powiązania:
https://bibliotekanauki.pl/articles/123294.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
pressure driven membrane processes
washings
flocculation
waste streams treatment
ultrafiltration
Opis:
The article presents the possibilities of employing an integrated flocculation/ultrafiltration system in the treatment of washings generated upon the rinsing of filter beds in pool water installations. Single ultrafiltration process was used as a comparator. Flocculation was carried out using commercial dialuminium pentahydroxychloride solution widely used at pool facilities for the removal of contaminants in flocculation processes. The studies consisted in determination of correlations between the conditions of the flocculation process (variable doses of Al3+ ions: from 4 to 280 mg/L) and the transport/separation characteristics of ultrafiltration membranes. Flocculation was performed at different temperatures of washings i.e. 8, 21, and 30°C for each of the pre-defined doses. Ultrafiltration was highly capable of reducing the turbidity of washings and removing a large group of contaminants as determined by turbidimetry and UV254 absorbance measurements. The studies revealed that the best transport/ separation characteristics of ultrafiltration membranes were obtained in a system in which ultrafiltration was performed following flocculation of washings carried out at 21°C using a 40 mgAl3+/L solution. The turbidity was reduced by ca. 99% and UV absorption was reduced by ca. 94% while the relative volumetric stream of the permeate increased by more than 35% (as compared to the filtration of washings in a single-process system). Membrane ultrafiltration significantly increased the quality of the waste stream consisting of washings from the pool water installation. Pre-processing of washings is required before ultrafiltration in order to limit the blocking of membrane pores. Flocculation may be one of such pre-processing methods.
Źródło:
Journal of Ecological Engineering; 2017, 18, 5; 96-103
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Removal of fluoride ions by ultrafiltration in the presence of cationic surfactants
Autorzy:
Klimonda, A.
Grzegorzek, M.
Majewska-Nowak, K.
Powiązania:
https://bibliotekanauki.pl/articles/208133.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
ultrafiltration
fluoride ions
surfactant
membrane
ultrafiltracja
jony fluorkowe
fluor
surfaktanty
membrany
Opis:
The usability of surfactant-aided ultrafiltration for removal of fluoride ions from aqueous solutions has been investigated. The experiments were conducted with the use of cellulose and polyethersulfone membranes. Fluoride solutions containing 10 and 100 mg F–/dm3 and cationic surfactants: octadecylamine acetate (ODA) and hexadecylpyridium chloride (CPC) were used in the experiments. The concentration of surfactants amounted to 320–960 mg/dm3. Ultrafiltration process was run under a trans-membrane pressure of 0.2 MPa. In the course of experiments, the effects of initial fluoride concentration, surfactant concentration and membrane type on the fluoride retention coefficient as well as the permeate flux were studied. It was found that the increase of the surfactant concentration effected in improvement of the separation efficiency. On contrary, the permeate flux decreased upon increase of the surfactant concentration. The process efficiency was also strongly influenced by the membrane and surfactant type. The permissible concentration of fluoride in the final product (below 1.5 mg F–/dm3) was obtained for the test with initial solutions containing 10 mg F–/dm3, polyethersulfone membrane and CPC con-centration equal to 644 and 966 mg/dm3.
Źródło:
Environment Protection Engineering; 2017, 43, 2; 5-13
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 43

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