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Wyszukujesz frazę "thermophilic" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Wpływ sposobu wstępnego preparowania odpadów poubojowych na ilość i skład powstającego biogazu w warunkach fermentacji termofilowej
Effect of method of post-slaughter waste conditioning on amount and composition of biogas produced in thermophilic fermentation
Autorzy:
Zieliński, M.
Dębowski, M.
Krzemieniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/1819689.pdf
Data publikacji:
2010
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
preparowanie odpadów ubojowych
biogaz
fermentacja termofilowa
slaughter waste preparation
biogas
thermophilic fermentation
Opis:
Celem prezentowanych badań było określenie takiego sposobu wstępnego przygotowania, stosowanych w eksperymencie odpadów poubojowych, który zapewni uzyskanie najwyższych efektów technologicznych charakteryzowanych poprzez ilość oraz skład jakościowy powstającego biogazu w warunkach fermentacji termofilowej.
The aim of this study was to identify the method of pre-treatment of post-slaughter waste used in the experiment to ensure the best technological results, expressed by the amount and qualitative composition of the biogas produced in the process. The application of various methods of processing of postslaughter waste before methane fermentation in an experiment conducted under static conditions showed that comparable technological effects were achieved when homogenisation followed by pasteurisation was applied and in such series inwhich these were supplemented by sonic treatment of the substrate. The application of various methods of processing of post-slaughter waste before methane fermentation in an experiment conducted under static conditions showed that comparable technological effects were achieved when homogenisation followed by pasteurisation was applied and in such series in which these were supplemented by sonic treatment of the substrate. Regardless of the pasteurisation time and the combined time of pasteurisation andultrasonic treatment, no statistically significant differences were found in the technological results achieved in terms of the amount and composition ofthe biogas produced in the process and the degree of decomposition of the analysed organic compounds. The worst final results of methane fermentation of post-slaughter waste were achieved when homogenisation was the only type of treatment applied in the organic substrate pre-processing. When homogenisation was combined with ultrasonic treatment, significantly better results were achieved; these were, however, distinctly lower than those achieved in the series in which pasteurisation was applied. The element which most greatly affected the technological effects achieved in the experiment, was the load of organic matter applied to the activatedsludge. The lowest effectiveness of the process, regardless of the method of conditioning of post-slaughter waste, was achieved in the option with a load of 6.0 g of dry organic matter/g of dry matter of sludge. The results achieved in static conditions with loads ranging from 1.0 g of dry organic matter/g of dry matter of sludge to 3.0 g of dry organic matter/g of dry matter of sludge producedcomparable final results, expressed as the amount and composition of biogas as well as the degree of decomposition of the analysed organic substances.
Źródło:
Rocznik Ochrona Środowiska; 2010, Tom 12; 895-907
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ sposobu prowadzenia fermentacji osadów ściekowych na produkcję biogazu
Influence of Different Digestion of Sewage Sludge on Biogas Production
Autorzy:
Dąbrowska, L.
Powiązania:
https://bibliotekanauki.pl/articles/1818635.pdf
Data publikacji:
2015
Wydawca:
Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:
biogaz
osady ściekowe
hydroliza termofilowa
fermentacja
biogas
sewage sludge
digestion
thermophilic hydrolysis
Opis:
The aim of this study was to determine the influence of different processes of biochemical stabilization of sewage sludge on the following: biogas production, decomposition of organic matter, transfer of heavy metal ions to the liquid phase of sludge. The stabilization processes of interest in this work were: methane thermophilic digestion (55°C), mesophilic digestion (37°C), mesophilic digestion of thermophilically hydrolyzed sludge. To characterize biogas production in bioreactors, modified Gompertz equation was used. Higher biogas yields were obtained during thermophilic digestion, compared to the yields obtained under mesophilic conditions – 1.01 and 0.91 dm-3 from 1 g of the removed dry organic matter of sludge, respectively. Mesophilic digestion of thermophilically hydrolyzed sludge provided the highest biogas production, approximately 1.15 dm-3 from 1 g of the removed dried organic matter of sludge. A comparable degree of organic matter degradation was observed for all digestion processes, 35–41%. CH4 content in biogas during sludge mesophilic digestion, excluding 1st day, amounted to 59–64%, while during thermophilic digestion – 57–62%. Higher value of biogas production velocity coefficient while intensive growth phase of mixed microbes population (1.11 dm-3/d), during preliminary hydrolyzed sludge stabilization, in comparison to non-hydrolyzed sludge (0.87 dm-3/d), indicates the possibility of obtaining higher biogas production. Therefore it would be more beneficial to conduct mesophilic digestion of sludge which was preliminarily hydrolyzed at temperature of 55°C. The application of thermophilic digestion did not significantly influence the release of heavy metal ions to the stabilized sludge liquid. The concentration of zinc in the liquid was below 0.8 mg/ dm-3 during digestion. The concentration of the other metals was below 0.2 mg/ dm-3 for all digestion processes.
Źródło:
Rocznik Ochrona Środowiska; 2015, Tom 17, cz. 2; 943-957
1506-218X
Pojawia się w:
Rocznik Ochrona Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
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