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Wyszukujesz frazę "Gorazda, K." wg kryterium: Autor


Wyświetlanie 1-4 z 4
Tytuł:
From sewage sludge ash to calcium phosphate fertilizers
Autorzy:
Gorazda, K.
Kowalski, Z.
Wzorek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/779127.pdf
Data publikacji:
2012
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
phosphorus recovery
sewage sludge
sewage sludge combustion
ash extraction
fertilizers production
waste
Opis:
Our work presents the results of the research on the utilization of ashes after sewage sludge combustion comprising phosphorus recovery in the form of useful products. The investigations were divided into three parts: selecting the combustion parameters of sewage sludge, examining ash leaching with mineral acids (nitric and phosphoric) to high phosphorus selectivity assuring a low content of iron and heavy metals in the extracted solutions and precipitation of CaHPO4 .2H2O. Suitable temperature of a sewage sludge combustion enables selective extraction of phosphorus compounds from ash because of hematite phase forming, insoluble in mineral acids. The extracts from phosphoric acid leaching, where the extraction of phosphorus compounds was 96.1%, have very good properties for its further use as the initial solution for CaHPO4 .2H2O with 6% lime milk. The obtained product is characterized by high purity and phosphorus availability compatible even with the feed phosphate standard.
Źródło:
Polish Journal of Chemical Technology; 2012, 14, 3; 54-58
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A chemical method of the production of "heavy" sodium tripolyphosphate with the high content of Form I or Form II
Autorzy:
Banach, M.
Kowalski, Z.
Wzorek, Z.
Gorazda, K.
Powiązania:
https://bibliotekanauki.pl/articles/779185.pdf
Data publikacji:
2009
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
tripolifosforan sodu
gęstość nasypowa
sodium tripolyphosphate
high bulk density
granular product
Opis:
Sodium tripolyphosphate STPP is used in laundry detergent as a detergent "builder". The paper presents the chemical method of obtaining "heavy", i.e. with higher bulk density granulated sodium tripolyphosphate. The bulk density of sodium tripolyphosphate was increased by preparing a mixture of the dried sodium phosphates, the recycled subgrain of STPP and water in specific proportions and calcining this mixture for 1 hour at 400°C and 550°C (to obtain a proper STPP form) in the chamber kiln. This method allows producing the granular sodium tripolyphosphate with high bulk density (1.04-1.07 kg/dm3) and a high content of Form I or Form II, respectively.
Źródło:
Polish Journal of Chemical Technology; 2009, 11, 2; 13-20
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of sodium tripolyphosphate production processes with a cumulative calculation method
Autorzy:
Kowalski, Z.
Kijkowska, R.
Gorazda, K.
Wzorek, Z.
Nowak, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/778020.pdf
Data publikacji:
2010
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
polifosforan sodu
kalkulacja łączna
analiza ekologiczna
sodium tripolyphosphate
cumulative calculation
ecological analysis
Opis:
Sodium tripolyphosphate – one of the condensed phosphates is an important ingredient in various types of cleaning substances and a food additive. The paper presents a comparison of different variants of STPP production with the application of the cumulative calculation method. The material balances of the processes were taken as the basis of the analysis. The method of the process analysis as shown in the cumulative calculation determines the influence of the emissions of dust and gas pollutions originating from a particular production process, as well as wastewater and solid wastes resulting from it, upon the natural environment. It was proved that the solution of the production STPP with the dry one-step method has the lowest impact on the environment among the three assessed solutions.
Źródło:
Polish Journal of Chemical Technology; 2010, 12, 4; 22-25
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dry single-stage method of sodium tripolyphosphate production – technological and economic assessment
Autorzy:
Gorazda, K.
Kowalski, Z.
Kijkowska, R.
Pawłowska-Kozińska, D.
Wzorek, Z.
Banach, M.
Nowak, A. K.
Powiązania:
https://bibliotekanauki.pl/articles/778549.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
sodium tripolyphosphate production
dry method
classic method
technical and economic analysis
Opis:
The study presents a technology of sodium tripolyphosphate (STPP) production with the use of a dry, single-stage method. The reacting substrates (concentrated wet-process phosphoric acid - WPPA and solid Na2CO3 ) are mixed with a recycled final product (STPP) in a mixer, then a „quasi-dry” mixture is calcined in a rotary kiln. Thanks to that, some stages of a classic method of STPP production are eliminated: one of the two-stage neutralization of the phosphoric acid with sodium carbonate at temperature ~80°C, filtration of the neutralised solution and its evaporation, as well as the stage of drying a solution of mono- and di-sodium orthophosphate in a spray dryer. According to the presented technical and economical analysis, the costs of STPP production using a single-stage dry method can be 10% lower compared to the classic method.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 1; 41-44
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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