Autor: Gac, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Hollow fibre membrane oscillations against fouling process – a numerical study
Autorzy:: Gac, J.M.
Gradoń, L.
Powiązania:: https://bibliotekanauki.pl/articles/185667.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: hollow fibre membrane
fouling
numerical modelling
DLVO model
membrana z włókna
zanieczyszczenie
modelowanie numeryczne
model DLVO
Opis:: The modelling of colloidal fouling and defouling of hollow fibre membranes in the presence of membrane oscillations is analysed by means of numerical simulations as an effect of complex coupling between hydrodynamic and surface forces. To describe the latter the Derjaguin-Landau-Vervey-Overbeek (DLVO) model has been employed. We have investigated the influence of various parameters of the process like flow rate, mean particle diameter, amplitude and frequency of the oscillations, and others, on the efficiency of the defouling process. The investigated parameters is close to that of a silica suspension in , a typical system modelling used to investigate membranę separation. On the basis of numerical simulation resu lts e have defined an optimal set of parameters preventing membrane fouling.
Źródło:: Chemical and Process Engineering; 2014, 35, 1; 149-158
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Computational analysis of displacement of particles with given size on the nonstationary bulging membrane as a theoretical model of membrane fouling
Autorzy:: Gac, J.M.
Gradoń, L.
Powiązania:: https://bibliotekanauki.pl/articles/185471.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: membrane
fouling
membrane cleaning
numerical modeling
membrana
zanieczyszczenia
czyszczenie membrany
modelowanie numeryczne
Opis:: A simple model of behaviour of a single particle on the bulging membrane was presented. As a result of numerical solution of a motion equation the influence of the amplitude and frequency of bulging as well as the particle size on particle behaviour, especially its downstream velocity was investigated. It was found that the bulging of a membrane may increase the mean velocity of a particle or reinforce its diffusive behaviour, dependeing on the permeation velocity. The obtained results may help to design new production methods of highly fouling-resistant membranes.
Źródło:: Chemical and Process Engineering; 2013, 34, 1; 109-119
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Towards a Numerical Model of Bacterial Filtration in Fibrous Filters
Autorzy:: Gac, J.M.
Gradoń, L.
Powiązania:: https://bibliotekanauki.pl/articles/185846.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: bacterial filtration
filtration efficiency
nonstationary filtration
biofilm formation
filtracja bakteryjna
skuteczność filtracji
biofilm
Opis:: A model of bacterial filtration on fibrous filter media is developed. The single fibre efficiency as well as the efficiency of the whole filter – at the onset of the process and the evolution of those quantities - are analysed. The differences between the numerical modelling of colloidal particles and bacteria are stressed in detail. The main differences are the active motion ability of bacteria and biofilm formation. The parameters of the model were identified based on the literature data.
Źródło:: Chemical and Process Engineering; 2015, 36, 1; 89-99
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Modification of polypropylene membranes by ion implantation
Autorzy:: Kotra-Konicka, K.
Kalbarczyk, J.
Gac, J.M.
Powiązania:: https://bibliotekanauki.pl/articles/185296.pdf
Data publikacji:: 2016
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: ion implantation
polymer membranes
membrane separation
polymer surface modification
implantacja jonów
membrany polimerowe
separacja membranowa
polimerowa modyfikacja powierzchni
Opis:: The influence of ion implantation on the structure and properties of polymers is a very complex issue. Many physical and chemical processes taking place during ion bombardment must be taken into consideration. The complexity of the process may exert both positive and negative influence on the structure of the material. The goal of this paper is to investigate the influence of H+, He+ and Ar+ ion implantation on the properties of polypropylene membranes used in filtration processes and in consequence on fouling phenomena. It has appeared that the ion bombardment caused the chemical modification of membranes which has led to decrease of hydrophobicity. The increase of protein adsorption on membrane surface has also been observed.
Źródło:: Chemical and Process Engineering; 2016, 37, 3; 331-339
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

Artykuł

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