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Wyszukujesz frazę "Reed, D." wg kryterium: Wszystkie pola


Wyświetlanie 1-4 z 4
Tytuł:
The fossil record of camelids demonstrates a late divergence between Bactrian camel and dromedary
Autorzy:
Geraads, D.
Didier, G.
Barr, W.A.
Reed, D.
Laurin, M.
Powiązania:
https://bibliotekanauki.pl/articles/2082155.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Mammalia
Camelidae
phylogeny
divergence time
fossil record
birth-and-death models
Pleistocene
Africa
Opis:
A new compilation of the Old World fossil record of Camelidae and a recent phylogenetic analysis allow a new assessment of the timing of the clade’s diversification. Using a recent implementation of the fossilized birth-death process, we show that the divergence between Bactrian camel and dromedary has a peak probability density around 1 Ma and probably occurred less than 2 million years ago. These dates are much younger than molecular estimates, which place the divergence between the dromedary and the Bactrian camel between 4 and 8 million years ago. Calibration problems in molecular dating seem to explain much of this difference.
Źródło:
Acta Palaeontologica Polonica; 2020, 65, 2; 251-260
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes of the Content of Heavy Metals and PAH’s in Sewage Sludge Treated with Reed Bed Lagoons
Autorzy:
Boruszko, D.
Powiązania:
https://bibliotekanauki.pl/articles/124401.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
polycyclic aromatic hydrocarbons
sludge treatment reed bed
speciation of heavy metals
Opis:
In Poland, low-input methods such as composting, vermicomposting, reed beds, willow energy and solar driers are increasingly often being used in the processing of sewage sludge. The northeastern part of Poland has operated successfully for years using these methods. This paper presents the results of using low-cost methods of sludge treatment in the wastewater treatment plant located in Zambrow, Podlaskie Province. The results of sewage sludge studies on the PAHs and heavy metals content after treatment in a reed bed system are presented. Among the 16 examined PAHs, the lowest concentration was obtained for the dibenz (a,h)anthracene. Not a single sample exceeded a concentration of 100 μg/kg d.m. The highest concentration was exhibited by fluoranthene, benzo(g,h,i)perylene and indeno(1,2,3-c,d)pyrene. The concentration of these compounds exceeded 1000 μg/kg d.m. The obtained results for the PAHs in sewage sludge from the reed lagoon at the treatment plant in Zambrow showed that the average content of PAHs studied was approximately 8300 μg/kg d.m. The lowest concentration, below 1.3 mg/kg d.m. of the seven heavy metals examined was obtained for mercury (Hg). On the other hand, the highest concentration, exceeding 1300 mg/kg d.m. was found in the case of zinc (Zn). The obtained results for the heavy metals in sewage sludge from the reed bed lagoons in Zambrow show that the average content of heavy metals studied is approximately 1620 mg/kg d.m. The results of the study demonstrate a high efficiency of the low-cost methods used in the Zambrów WWTP in terms of the quality of processed sludge. The sewage sludge from the lowest layer of the reed lagoon (13–14 years of dewatering and transformation) are characterized by the lowest PAHs and heavy metals content. The higher a sediment layer lies, i.e. the shorter the time of processing, the higher are the PAHs and content of heavy metals content. This indicates a great role of reeds in the accumulation of these compounds.
Źródło:
Journal of Ecological Engineering; 2018, 19, 4; 75-87
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact Low-Cost Processing Methods on the Contents of Polycyclic Aromatic Hydrocarbons in Sewage Sludge
Wpływ niskonakładowych metod przetwarzania na zawartość wielopierścieniowych węglowodorów aromatycznych w osadach ściekowych
Autorzy:
Boruszko, D.
Powiązania:
https://bibliotekanauki.pl/articles/388975.pdf
Data publikacji:
2013
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
polycyclic aromatic hydrocarbons
reed bed systems
sewage sludge
WWA
laguna trzcinowa
osady ściekowe
Opis:
In Poland, more and more often to the processing of sewage sludge are used low-input methods: composting, vermicomposting, reed bed, willow energy and solar driers. Also in the north-eastern part of Poland for many years successfully operate objects using these methods. The paper presents the experience of the use of low-cost methods of sludge treatment in wastewater treatment plant located in Zambrow, Podlaskie Province. The results of studies of sewage sludge on the PAHs content after treatment in reed bed system were presented. In 2012, samples of sediment were taken from the middle part of the oldest red bed (still in service) in the 3-meter profile of the sediment fill. Sampling was performed using a special probe to enable the extraction of sewage sludge from the full depth of the lagoon. Samples were averaged and sediment samples from each 0.5 m section were tested. The obtained results for the PAHs in sediments from the lagoon of sludge from reed sewage treatment plant in Zambrow show that the average content of PAHs studied is approximately 5552.8 μg · kg–1 d.m. At the same time, there are clear differences in the content of these compounds in each of the processed layers of sludge in the lagoon. An average contents of PAHs tested in individual layers of the sludge were as follows: 5852.2 μg PAHs · kg–1 d.m. in the upper sludge layer (0–1 m), 6636.8 μg PAHs · kg–1 d.m. in the middle sludge layer (1–2 m) and 4169.5 μg PAHs · kg–1 d.m. in the oldest, bottom sludge layer (2–3 m). A significant decrease in the total PAHs content with increasing the time period of the processing of sludge lagoons at the lowest bottom layer was observed after 10–12 years. Sewage sludge processed by California earthworms for vermicompost was characterized by the lowest total content of studied PAHs, which amounted 2550.2 μg · kg–1 d.m.
W artykule przedstawiono wyniki doświadczeń z zastosowaniem niskonakładowych metod przetwarzania osadów w oczyszczalni ścieków położonej w Zambrowie, województwo podlaskie. Zostały przedstawione wyniki badań osadów ściekowych na zawartość WWA po przetworzeniu w lagunach trzcinowych oraz wermikulturę. Uzyskane wyniki zawartości WWA w osadach z laguny trzcinowej z oczyszczalni ścieków w Zambrowie pokazują, że średnia zawartość WWA wynosiła 5552,8 μg · kg–1 sm. Jednocześnie istnieją wyraźne różnice w zawartości tych związków w każdej z przebadanych warstw osadu w lagunie. Górna warstwa osadu (0–1 m) zawiera średnio 5852,2 μg · kg–1 s.m. badanych WWA, środkowa warstwa osadu (1–2 m) zawiera średnio 6636,8 μg · kg–1 s.m., a najstarsza dolna warstwa osadów (2–3 m) wskazuje średnio najmniejszą zawartość 4169,5 μg · kg–1 s.m. WWA. Zaobserwowano wyraźne zmniejszenie zawartości sumy WWA wraz z wydłużaniem okresu czasu przetwarzania na lagunach w najniższej dolnej warstwie osadu stwierdzoną po 10–12 latach. Osad ściekowy przetworzony przez dżdżownice kalifornijskie na wermikompost charakteryzował się najmniejszą zawartością sumy badanych WWA, wynoszącą 2550,2 μg · kg–1 s.m.
Źródło:
Ecological Chemistry and Engineering. A; 2013, 20, 10; 1153-1161
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of effective microorganisms bacteria on low-input sewage sludge treatment
Autorzy:
Boruszko, D.
Butarewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/208090.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
microorganisms
sewage sludge
wastewater treatment
willow
reed
dairy sewage
sediments
sewage sludge treatment
mikroorganizmy
osady ściekowe
oczyszczanie ścieków
wierzba
trzcina
ścieki z przemysłu mleczarskiego
osady denne
uzdatnianie osadów ściekowych
Opis:
Six-month experiments have been carried out using pilot installations of low-budget methods of sewage sludge treatment. Sewage sludge was processed using vermiculture or plants such as willow or reed. The study was also conducted in a solar dryer. In some parts of the research, effective microorganisms were used. The results of the sediment research, including: contents of organic and mineral matter, hydration reaction, contents of nitrogen and phosphorus, as well as the indicators of the sanitary condition, were presented. The results confirmed a perceptible influence of the effective microorganisms on the structure of the dry mass of dairy sewage dewatered on reed and willow plots or transformed into vermicompost. A slight, however, apparent difference in a faster and more effective mineralization of organic substances contained in the sludge after half a year of processing, as well as significant reduction of the number of potential pathogenic bacteria was observed.
Źródło:
Environment Protection Engineering; 2015, 41, 4; 83-96
0324-8828
Pojawia się w:
Environment Protection Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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