Browsing by Subject "coagulation"

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Access status: Open Access ,
Badania nad unieszkodliwianiem ścieków kopalnianych towarzyszących surowcom węglowodorowym
(2006) Konopka, Elżbieta; Lewkiewicz-Małysa, Aleksandra
Waste mine's water produced during oil and natural gas exploitation are to varying degree (highly) mineralized with chlorine and sodium brines. Considerable quantities of specific organic substances and a charge of hardly settling suspension are present in the mine's water. This waste needs treating to such a degree that it can be disposed to water courses or injected into the rock mass. Laboratory analyses of two exemplary waste samples were targeted at the efficiency of the coagulation-flocculation method in view of degree of contamination. The analyses were aimed at determining possibilities and limitations of methods of removing components of waste which have a negative environmental influence on surface waters and rock mass.
Access status: Open Access ,
Prospects for the development of hydrate storage and transportation technology of methane gas
(2015) Pavlenko, Anatolìj Mihajlovič; Košlak, Ganna Volodimirìvna; Vitâz', Oleg Ûlìjovič; Rybicki, Czesław
The gas hydrate tecłmologies can be alternative to the traditional methods of the rational use of hydrocarbon gases. However the known constructions of apparatuses for the production of gas hydrates cannot satisfy the condition of their industrial use fully. Authors offer to carry out the high-quality contact of gas and water at formation of gas hydrate by jet apparatuses with a free falling jet. On their basis a technological chart is offered for realization of continuous cycle of production of gas hydrate. The aim is to develop technical solutions and process parameters of continuous production of gas hydrates, which would satisfy the requirements of industrial application.
Access status: Open Access ,
The treatment of post-processing liquid from the hydrothermal carbonization of sewage sludge
(2023) Czerwińska, Klaudia; Marszałek, Anna; Kudlek, Edyta; Śliz, Maciej; Dudziak, Mariusz; Wilk, Małgorzata
Wydział Inżynierii Metali i Informatyki Przemysłowej
The liquid phase, being amajor product of the hydrothermal carbonization of sewage sludge, is highly problematic due to numerous toxic compounds that make it impossible to dispose of without adequate purification. Therefore, this study is focused on the two groups of selected advanced methods of post-processing water derived from the hydrothermal carbonization process of sewage sludge. The first group included membrane processes, namely ultrafiltration, nanofiltration and double nanofiltration. The second included coagulation, ultrasonication and chlorination. Chemical and physical indicators were determined to confirm the validity of these treatment methods. The highest reduction values were found for double nanofiltration, which showed a spectacular decrease in the Chemical Oxygen Demand by 84.9 %, specific conductivity by 71.3%, nitrate nitrogen by 92.4%, phosphate phosphorus by 97.1%, total organic carbon by 83.3 %, total carbon by 83.6 %, and inorganic carbon by 88.5 %, as compared to the liquid phase after hydrothermal carbonization. In the second group, for the largest number of parameters, the greatest reduction was achieved when $10 cm^{3}/L$ of iron coagulant was added to the permeate from ultrafiltration. Additionally, COD decreased by 41 %, P-PO3-4 content by 78 %, phenol content by 34 %, TOC content by 97 %, TC content by 95 % and IC content by 40 %.