The paper contains a microbiological characteristics of sewage sludge composted in controlled conditions together with biowastes (straw, sawdust). An experiment was carried out, where the composted material was mixed up in adequate weight proportion and different C:N proportion and placed in bioreactor chambers with a constant air flow (4 l/min). The research aimed at defining the development dynamics and the survival of pathogenic microorganisms in the sewage sludge composted with different additions in a cybernetic bioreactor. Samples of compost necessary for microbiological analyses were taken at the same time, in reference to the actual temperature value in composting biowastes. Bacteriological studies were carried out on selected substrates by plate method determining the number of pathogenic bacteria from the species: Salmonella, as well as from Enterobacteriaceae family. In the experiments, the presence of living eggs of intestinal ATT pathogens was determined by floatation method, as well. It was found that the sewage sludge used in composting process did not contain any Salmonella spp. bacteria or any living eggs of intestinal ATT pathogens and completely eliminated the number of bacteria from Enterobacteriaceae family in K1 (75% sewage sludge + 5% straw + 20% sawdust, C:N = 9.2) and K2 (60% sewage sludge + 5% straw + 35% sawdust, C:N = 12.1) combinations. On the basis of the obtained results it was found that the elimination of the studied groups of microorganisms in all studied composts took place with the increase of temperature, pH value and ammonia concentration. The obtained composts (K1-K4) met the sanitary norms according to Commission regulation (EC)... (2007) and the regulation of the Minister for Agriculture and Country Development (Rozporządzenie... 2008).
Full text available in Polish in Adobe Acrobat format:https://www.npt.up-poznan.net/pub/art_4_97.pdf
| MLA | Wolna-Maruwka, Agnieszka, et al. "Przeżywalność bakterii z rodziny Enterobacteriaceae w kompostach sporządzonych na bazie osadu ściekowego." Nauka Przyr. Technol. 4.6 (2010): #97. |
| APA | Agnieszka Wolna-Maruwka, Justyna Klama, Alicja Niewiadomska, Małgorzata Natywa, Monika Piotrowska, Anna Orchowska (2010). Przeżywalność bakterii z rodziny Enterobacteriaceae w kompostach sporządzonych na bazie osadu ściekowego. Nauka Przyr. Technol. 4 (6), #97 |
| ISO 690 | WOLNA-MARUWKA, Agnieszka, et al. Przeżywalność bakterii z rodziny Enterobacteriaceae w kompostach sporządzonych na bazie osadu ściekowego. Nauka Przyr. Technol., 2010, 4.6: #97. |
Agnieszka Wolna-Maruwka
Katedra Mikrobiologii Ogólnej i Środowiskowej
Uniwersytet Przyrodniczy w Poznaniu
ul. Szydłowska 50
60-656 Poznań
Poland
e-mail: amaruwka@interia.pl