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Wyświetlanie 1-2 z 2
Tytuł:
FE2(SO4)3 and Bentonite Use to Reduce Cod Indicators in Wastewater Containing Detergents
Autorzy:
Issayeva, Akmaral
Abubakirova, Azhar
Syzdykova, Marzhan
Arystanova, Saltanat
Anlamasova, Gulnara
Zhumakhanova, Roza
Leska, Boguslawa
Powiązania:
https://bibliotekanauki.pl/articles/2068458.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
wastewater
chemical oxygen demand
ferric iron
bentonite
Opis:
Wastewater pollution with detergents is one of the environmental problems associated with the rational use of water resources. The existing methods of physicochemical wastewater treatment, despite their efficiency, are open to secondary environmental pollution. Biological coagulation/flocculation methods are widely used with the plant waste. The aim of this research was the use of ferric iron obtained by means of the bacterial-chemical method and bentonite to reduce the chemical oxygen demand in the wastewater containing detergents. It was identified that the use of Fe2 (SO4)3 obtained using the bacterial-chemical method with thionic bacteria Acidithiobacillus ferrooxidans BIT 1 and bentonite as a clay material is promising. At the same time, it was found that the highest reduction degree in the chemical oxygen demand – 88.1 ± 7.9% in wastewater was noted in the variation where the bacterial-chemical ferric iron in the amount of 1.75 g/L was used in combination with bentonite in the amount of 600 mg/L.
Źródło:
Journal of Ecological Engineering; 2022, 23, 3; 68--73
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Use of Acidithiobacillus ferrooxidans for Decontamination of Explosive Waste from Oil Refineries
Autorzy:
Issayeva, Akmaral
Syzdykova, Marzhan
Akhmet, Ainagul
Bakhov, Zhumabek
Ospanova, Zhanna
Chingisbayev, Bakhytzhan
Kamalova, Manzura
Karimova, Saulet
Powiązania:
https://bibliotekanauki.pl/articles/27323816.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
pyrophoric iron sulfide
Acidithiobacillus ferrooxidans
explosion hazard
waste
oil refinery
cultivation of microorganisms
Opis:
Pyrophoric iron sulfides formed as a result of oil cracking, when in contact with air oxygen, have the ability to self-ignite, as a result of which they are highly explosive at oil refining enterprises. It is known that the oil refineries in Kazakhstan produce from 4 to 10 tons per year of this hazardous waste. The main idea of the study was to use the biochemical abilities of microorganisms, in particular the thionic bacteria Acidithiobacillus ferrooxidans, to change the physico-chemical properties of pyrophoric iron sulfides. In this regard, the aim of the study was to determine the possibility of using A. ferrooxidans for deactivation of pyrophoric iron sulfides at an oil refinery in the south of Kazakhstan. It was found that the cultivation of a strain of thionic bacteria A. ferrooxidans ThIO1 in solutions with pyrophoric iron sulfides as the only source of divalent iron and compliance with optimal conditions for their vital activity: +28 °C, pH 2.0–2.5, S:L=1:10±2, will decontaminate explosive waste of oil and gas industry enterprises. The method of biological decontamination of pyrophoric iron sulfides was introduced at the PetroKazakhstan Oil Products LLP refinery in Southern Kazakhstan in 2007. For the successful implementation of this method at other enterprises, it is necessary to develop a special adapted industrial installation for the biological decontamination of pyrophoric deposits with continuous (in the case of receiving waste from different enterprises of Kazakhstan) or periodic cultivation of microorganisms, and compliance with optimal parameters for the vital activity of microorganisms.
Źródło:
Journal of Ecological Engineering; 2023, 24, 7; 19--24
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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