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Wyświetlanie 1-6 z 6
Tytuł:
Photochemical oxidation model of organic pollutants in greywater from a small household
Autorzy:
Bielski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/207989.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
COD
greywater
small household
ChZT
woda szara
małe gospodarstwo domowe
Opis:
The treatment of coagulated greywater from a small household was investigated. The processes of oxidation of organic compounds with hydrogen peroxide combined with ultraviolet radiation (H2O2/m3/UV) was described. Greywater with various initial COD and TOC concentrations was used in the H2O2/m3/UV process. The process parameters were hydrogen peroxide doses 0.5–4.0 kg H2O2/m3, UV (254 nm) light intensity 75.5 W/m2 and irradiation time – 1 h. The oxidation efficiency varied broadly from 15 to 98% and higher COD values corresponded to lower oxidation efficiencies. The average hydrogen peroxide consumption per kg of COD w was = 12.2 g H2O2/m3/g O2 COD, while per TOC it was w′ = 69.0 g H2O2/m3/g C. The experiments enabled one to developed mathematical models for coagulation and oxidation kinetics. The models showed that at the initial COD = 859 g O2/m3, the coagulant dose of 100 g Al3+/m3, the hydrogen peroxide dose of 4 kg H2O2/m3 and the UV irradiation time of 3 h it is possible to decrease the COD by 98.4%.
Źródło:
Environment Protection Engineering; 2020, 46, 1; 91-115
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
PAC adsorption efficiencies in the filter and in the homogeneous flocculator. A full-scale comparative study
Autorzy:
Bielski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/2057620.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
PAC
powdered activated carbon
adsorption
flocculation
sproszkowany węgiel aktywny
adsorpcja
flokulacja
Opis:
The paper investigates the efficiency of adsorption of organic pollutants present in natural water on powdered activated carbon (PAC). A PAC adsorption capacity is related to the mass exchange driving force between water and sorbent. During the study, it was confirmed that the mass transfer driving force in the homogeneous flocculator with simultaneous PAC adsorption was lower than in the filter column. The filter showed a better utilization of PAC adsorption capacity than the volume system, for the optimal PAC dose. The authors proposed a new method where adsorption was carried out in the filter column with PAC applied to its upper layer. The powdered sorbent was applied to the bed at the end of a backwashing cycle. Two models of PAC adsorption in transient states for the homogeneous flocculator and the column mass exchanger were presented. The simulation calculations confirmed that there was still a possibility to double the PAC adsorption capacity concerning commonly used adsorption with coagulation in the homogeneous flocculator.
Źródło:
Environment Protection Engineering; 2022, 48, 1; 83--97
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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