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1

Evaluation of meat waste composting process based on fecal streptococci survival

100%
Ligocka A., Paluszak Z.
Polish Journal of Environmental Studies
|
2008
|
tom 17
|
nr 5
739-744
Animal by-products of category 3 after proper processing may be a valuable fertilizer for agricultural purposes. However, they can contain numerous bacterial and viral pathogens and, in cases of improper handling, may pose a health risk for people and animals. This study is aimed at monitoring the number of fecal streptococci introduced into carriers of different types imitating fragments of meat and bone wastes during composting process in a drum bio-reactor. Fecal streptococci are indicator microorganisms, and are known by their thermoresistant characteristics, so it was assumed that their elimination will also diminish the pathogenic microorganisms present in wastes. Three research cycles were carried out in a drum-type bio-reactor, and a different course of temperature was noted in each of them. In cycle 1, in which the temperature exceeded 60ºC, fecal streptococci died the fastest, 139.0-154.4 hours later (depending on carrier type). In cycles 2 and 3, maximum temperatures were similar (57.2ºC and 58.8ºC, respectively), but secondary multiplication of the streptococci in the 102nd hour of the processes was observed. In cycle 2 at this time their number was similar to the level of initial suspension. The type and size of the carriers were of no major importance to streptococci survival in the bio-reactor. Yet in each of the cycles analyzed, effective reduction was accomplished and the product obtained can be considered to be environmentally safe.
2

Experimental study on fecal bacteria movement in soil amended with slurry

100%
Paluszak Z., Olszewska H., Breza-Boruta B.
Electronic Journal of Polish Agricultural Universities. Series Environmental Development
|
2003
|
tom 06
|
nr 2
The aim of study was to estimate survival, the rate and range of migration of fecal bacteria in soils fertilized with bovine slurry. The research showed that a great majority of fecal bacteria was retained in higher parts of soil profiles. The precipitation, physical and chemical properties of soil, the bacterial population density used in experiment were most important factors that influenced infiltration of fecal microorganisms.
3

The survival of selected fecal bacteria in peat soil amended with slurry

100%
Paluszak Z., Ligocka A., Breza-Boruta B., Olszewska H.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
|
2003
|
tom 06
|
nr 2
Slurry often contains many pathogenic microorganisms, which are dangerous to human and animal health. The aim of study was to estimate the elimination rate of indicators and pathogenic bacteria – Escherichia coli, fecal streptococci D-group and Salmonella senftenberg W775 in peat soil according to soil storage temperature and slurry addition. The elimination rate of fecal bacteria was more effective in 20°C than in 4°C. The slowest reduction of the fecal bacteria was observed in soil with slurry. The salmonellas were eliminated more slowly in comparison to another group of investigated microorganisms. The fastest reduction of streptococci was estimated in 20oC, however E.coli in 4°C. To minimize the hazard for environment, slurry should be subjected to monitoring investigation before use on arable land.
4

Microbiological assessment of water samples from urban water reservoir

80%
Sliwa-Dominiak J., Deptula W.
Advances in Agricultural Sciences
|
2010
|
tom 13
|
nr 1
5
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Evaluation of pollution in bottom sediments of the lower Vistula along the section Wyszogrod-Torun based on bacteriological indicators of the sanitary state

80%
Wilk I., Kalwasinska A., Donderski W.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
|
2010
|
tom 14
This paper deals with the evaluation of the sanitary state of bottom sediments of the Lower Vistula along the section from Wyszogród to Toruń. The contamination extent of bottom sediments by easily decomposable organic matter and substances of faecal origin was defined based, respectively, on the number of heterotrophic bacteria capable of growth at 22°C and the occurrence of faecal coli (FC) bacteria. Examination results enabled to classify the bottom sediments of the Lower Vistula in the studied section as little and moderately loaded with easily decomposable organic matter, as well as very little, little and moderately polluted with faeces. The highest contamination with faecal and easily decomposable organic matter was recorded in bottom sediments of the sites located in Wyszogród and Płock. Research point situated within the limnic part of the reservoir in the vicinity of Włocławek was the least contaminated site.
6

Microbiological analysis of lessive soil fertilised with animal waste

80%
Paluszak Z., Olszewska H.
Electronic Journal of Polish Agricultural Universities. Series Agronomy
|
2000
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tom 03
|
nr 1
The present research aimed at defining the survival rate of faecal bacteria selected in the lessive soil fertilised with cattle slurry. The field trials over dry and moist summers involved slurry at the amount of 3 l.m-2 with the suspended matter of S. senftenberg, E. coli and faecal streptococci. Soil was sampled from different depths prior to the application of slurry, a week after the application, and then four times with monthly intervals. On average over the total soil profile over the dry period, the survival time of E. coli amounted to 17.7 weeks, faecal streptococci – 18.7, while Salmonella bacilli - 14.1 weeks. Over the moist period, it was much longer and amounted to 26.7, 25.9 and 19.9 weeks, respectively. A prevailing number of faecal bacteria were retained in the upper layers of soil profiles. Over the dry period microorganisms migrated to the depth of 43 cm, while over the moist period - to 70 cm.
7

The influence of anaerobic fermentation on the survival of microorganisms

80%
Paluszak Z.
Electronic Journal of Polish Agricultural Universities. Series Veterinary Medicine
|
1998
|
tom 01
|
nr 1
The subject of investigations was the evaluation of sanitary-hygienic state of slurry subject to anaerobic fermentation in bioreactor under thermophilic conditions. The influence of anaerobic fermentation on the survival of Salmonella senftenberg, EHEC and streptococci D group was specified. It turned out from investigations that after 4 hours the number of Salmonella senftenberg and EHEC bacteria decreased 108 times in relation to the control test. The lowest elimination rate was for streptococci D group. The percentage of invasive eggs of Ascaris suum decreased after 4 hours from 89% to 7%. The investigation proved proper run of anaerobic process in bioreactor and sufficient desinfection of cattle slurry.
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