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Wyszukujesz frazę "phosphorus recovery" wg kryterium: Temat


Wyświetlanie 1-3 z 3
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:
The influence of thermal processing of sewage sludge on the usage properties of the formed ash
Autorzy:
Gorazda, K.
Wzorek, Z.
Jodko, M.
Powiązania:
https://bibliotekanauki.pl/articles/778645.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
odzysk fosforu
właściwości popiołów
ługowanie popiołu
popiół przemysłowy
phosphorus recovery
ash properties
ash extraction
industrial ash
Opis:
The influence of sewage sludge incineration temperature on the formed ash constitution was examined. The comparative extraction tests of two differently prepared ashes (laboratory and industrial) were carried out in order to verify if the parameters of sewage sludge incineration influence the extraction selectivity of phosphorus compounds. The laboratory ash (A(lab)) were prepared from sewage sludge incinerated at 950°C on a laboratory scale while the industrial ash (A(ind)) comes from thermal utilization system of the sewage sludge at the Gdynia Sewage Treatment Plant, which uses fluid-bed furnace incineration at 850 - 900°C. It was found that the temperature and the conditions of the sewage sludge incineration process have an effect on the usage properties of the formed ash. Despite the twofold lower Fe content in the industrial ash than that of the laboratory one, its content in extracts after phosphoric acid leaching is 4.7 times higher. The lower values of PO4^3- leaching degree from the industrial ash than the laboratory ash were observed, as well as a decrease of extraction productivity.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 4; 21-27
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phosphorus recovery from waste - methods review
Autorzy:
Wzorek, Z.
Gorazda, K.
Powiązania:
https://bibliotekanauki.pl/articles/779805.pdf
Data publikacji:
2007
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
odzysk fosforu
ścieki
pomioty
osad ściekowy
mączka mięsno-kostna
phosphorus recovery
waste
manure
sewage sludge
meat-bone meal
Opis:
According to sustainable development principles, searching for alternative phosphorus sources, especially possible ways of its recycling from waste, should be treated as a preferential problem of the phosphorus industry. The ways admitted as most important are: - phosphorus recovery from municipal and industrial sewage and from sewage sludge, - utilization of phosphorus from manure, - management of waste from meat industry. The forecasts elaborated at the end of the last century, indicate that over 50% of the world phosphorus resources in use today will be depleted during the next 60 - 70 years. That fact contributes to increase of market prices of phosphorus products. This work presents possible directions for the recovery and management of sewage sludge, meat meal and manure as a phosphorus source for chemical industry.
Źródło:
Polish Journal of Chemical Technology; 2007, 9, 2; 57-60
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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