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Wyszukujesz frazę "membrane selectivity" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Membrane reactor for enzymatic depolymerization – a case study based on protein hydrolysis
Autorzy:
Noworyta, A.
Trusek, A.
Wajsprych, M.
Powiązania:
https://bibliotekanauki.pl/articles/778609.pdf
Data publikacji:
2018
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
enzymatic membrane reactor
membrane selectivity
volume enzyme immobilization
biopolymer
hydrolysis
process efficiency
Opis:
The efficiency of enzymatic depolymerization in a membrane reactor was investigated. The model analysis was performed on bovine serum albumin hydrolysis reaction led by three different enzymes, for which kinetic equations have different forms. Comparing to a classic reactor, the reaction yield turns out to be distinctly higher for all types of kinetics. The effect arises from increasing (thanks to the proper selectivity of the applied membrane) the concentration of reagents in the reaction volume. The investigations indicated the importance of membrane selectivity election, residence time and at non-competitive inhibition the substrate (biopolymer) concentration in feed stream. Presented analysis is helpful in these parameters choice for enzymatic hydrolysis of different biopolymers.
Źródło:
Polish Journal of Chemical Technology; 2018, 20, 4; 44-48
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Resource-Saving Technologies in the Use of Sedimentation Inhibitors for Reverse Osmosis Installations
Autorzy:
Trus, Inna
Gomelya, Mukola
Skiba, Margarita
Pylypenko, Tetiana
Krysenko, Tamara
Powiązania:
https://bibliotekanauki.pl/articles/2025383.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
reverse osmosis
concentrate
membrane
permeate
productivity
selectivity
antiscalant
Opis:
The processes of desalination of weakly mineralized waters using a reverse osmosis membrane were studied. The operational efficiency of membranes is limited mainly by membrane contamination. It was shown that the preliminary mechanical water purification helps to increase the productivity and selectivity of the membrane. One of the main causes of membrane contamination is the formation of carbonate deposits on their surface. One way to prevent membrane contamination is to dose antiscalants. It was established that the use of hydrolyzed polyacrylonitrile (HPAN) and hydrolyzed polyacrylamide (HPAA) as a stabilizer of scale formation is effective for concentrates of reverse osmosis desalination of water.
Źródło:
Journal of Ecological Engineering; 2022, 23, 1; 206-215
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency of Reverse Osmosis and Ion Exchange in Water Purification from Nitrates
Autorzy:
Gomelya, Mykola
Shabliy, Tetyana
Makarenko, Iryna
Vakulenko, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2202127.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
nitrates
membrane
reverse osmosis
ion exchange
selectivity
productivity
permeate
concentrate
regeneration
Opis:
The process of extracting nitrates from water by the methods of reverse osmosis and ion exchange was investigated in the paper. In the formation of reverse osmosis, low-pressure membranes were used, and in ion-exchange processes, highly alkaline anionite AB–17–8 was applied in salt form. The dynamics of changes in the concentration of nitrates in the permeate and the concentration with an increase in the degree of permeate selection from 9 to 90% at initial nitrate concentrations of 18, 50 and 100 mg/dm3 were determined. The indicators of selectivity and productivity of membranes were calculated depending on the degree of permeate selection. It was shown that the low-pressure reverse osmosis membrane is characterized by low selectivity values at high productivity values in the selected part of the nitrate concentration. It was established that the ion exchange method is significantly more effective than reverse osmosis in removing nitrates from water. It ensures the reduction of nitrate content in purified water to a value of less than 1 mg/dm3 when the degree of their extraction is reached at the level of 99%. As the ionite is saturated with nitrates, the efficiency of their extraction decreases. Anionite sorbs nitrates effectively enough, being both in the chloride mixture and in the sulfate form. Nitrates are effectively desorbed by 2H solutions of sodium chloride and sodium or ammonium sulfate.
Źródło:
Journal of Ecological Engineering; 2022, 23, 10; 172--180
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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