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Regeneracja adsorpcyjna zużytej frytury za pomocą handlowego krzemianu magnezu

100%
Buczek B.
Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie
|
2011
|
issue 874
5-18
EN
When food is fried in the presence of oxygen, light, moisture and at higher temperatures, multistage and chemical reactions occur in the frying fat. Non-polar triacylogly­cerides transform into polar-nature substances that accelerate the break-down of fat. Substances formed during frying unfavourably affect the quality and nutritional value of fried food, a fact manifested by changes in the smell, consistency and colour of the frying medium. In order to improve the quality indicators of frying fats, the oil could be purified by contact with various carbonaceous or mineral adsorbents. Using commercial magnesium silicate to remove degrading products from frying oil for chips was studied. The quality of fresh, used and purified frying oils were evaluated by measuring the density, viscosity, colour, iodine value, acid value, peroxide value, total oxidation index, content of polar compounds and fatty acids profiles. The results of using commercial magnesium silicate at different mass ratios to purify used frying oil are discussed.
2

Gliceryna – produkt uboczny procesu wytwarzania biodiesla

88%
Buczek B., Kozera P.
Zeszyty Naukowe Uniwersytetu Ekonomicznego w Krakowie
|
2013
|
issue 912
5-16
EN
The paper presents the physical and chemical properties of glycerol and how it is used. It also shows methods of the industrial processing of glycerine fraction – in terms of obtaining and concentrating it – and methods of biodiesel production, of which glycerine is a by-product. The paper evaluates the possibility of concentrating glycerol by removing other compounds of technical glycerine using carbon adsorbents (ARP2) prepared with oxygen active centers. The most important aspect of this approach is to eliminate the energy consuming rectification process. Results of this study show that concentrating glycerol using specially selected carbon sorbents is a valid process.
3
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Biochar application in the mercury ions adsorption from aqueous solutions

51%
Gąsior D., Tic W. J., Paradowska M., Platje J. J., Cibulskiene D.
Economic and Environmental Studies
|
2016
|
vol. 16
|
issue 4(40)
803-818
EN
Biochar is the carbon-rich product produced by thermal decomposition of organic material in anaerobic conditions or under limited supply of oxygen. The removal of pollutants from water using biochar materials is a low cost, sustainable approach for providing pure water. The adsorption of mercury ions onto pyrolyzed chicken manure, sewage sludge and rye straw was studied and compared with the adsorption of mercury ions onto commercial activated carbons of various origins and grain size. The impact of pH, biochar adsorbents amount and phase contact time on the adsorption efficiency were investigated. Tested biochars were characterized by large, porous surface area and their adsorption potential was comparable with the activated carbons.
PL
Biowęgiel zdefiniować można jako bogaty w węgiel produkt otrzymany poprzez termiczny rozkład materii organicznej w warunkach beztlenowych lub z nieznacznym udziałem tlenu. Usuwanie zanieczyszczeń z wody z zastosowaniem biowęgla stanowi opłacalne ekonomiczne, zgodne z założeniami zrównoważonego rozwoju rozwiązanie. W pracy analizowano stopień adsorpcji jonów rtęci na pirolizowanych odpadach organicznych pochodzących z kurzeńca, osadu ściekowego oraz słomy żytniej. Wyniki badań zestawiono z potencjałem adsorpcyjnym węgli aktywnych o różnym pochodzeniu i uziarnieniu. Określono wpływ pH, ilości dodawanych adsorbentów oraz czasu kontaktu adsorbenta z adsorptywem na wydajność procesu adsorpcji. Badane biowęgle charakteryzowały się dużą powierzchnią właściwą, a ich potencjał adsorpcyjny był porównywalny z potencjałem węgli aktywnych.
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