K. Budzińska

Survivability of Salmonella senftenberg W775 in Cattle Slurry under Various Temperature Conditions

The effect of varied temperatures of cattle slurry storage conditions on the rate of elimination of Salmonella senftenberg W775 bacilli was studied. It was demonstrated that a temperature of 4C had a stabilizing effect on the bacteria, which resulted in the longest time of Salmonella bacilli survivability. A regression analysis defined the daily loss of the bacteria. The rate of elimination of Salmonella amounted to 0.26 log/day at a temperature of 4C, which resulted in a theoretical time of bacteria survivability of 42 days. At a temperature of 20C, faster inactivation of Salmonella cells was shown, which was defined as 0.30 log/day. Salmonella senftenberg W775 bacilli at 30 C were able to survive 13 days, at a daily population loss of 0.87 log. The Salmonella cells died at 40C (10 days). A significant relationship between the survival period of Salmonella senftenberg W 775 in cattle slurry and the temperature of its storage was noted.

ANALYSIS OF THE RESULTS OF MEASUREMENT OF CONCENTRATIONS OF AIR POLLUTION WITH PM10 AND PM2.5 MEASURING STATION SQUARE OF POZNAN IN BYDGOSZCZ

The phenomenon of suspended particulate pollution PM10 and PM2.5 occurs in large urban areas where the main source of their presence is communication, which is primarily related to the combustion of liquid fuels. PM2.5 dust pollution is a major risk factor for diseases of the respiratory, cardiovascular, and allergy. Act regulating the standards and target dates for reducing concentrations of particulate matter in urban areas and in all the cities of over 100 thousand. residents of the Directive of the European Parliament and Council Directive 2008/50/EC of 21 May 2008. on ambient air quality and cleaner air for Europe (CAFE). The acceptable level of average daily concentration of PM10 is 50 μg/m3 and may be exceeded by not more than 35 times a year, while the level of allowable annual average concentration of 40 μg/m3. The aim of this study was to assess the state of air pollution of dust PM10 and PM2.5 for the selected area of the city of Bydgoszcz. The analysis was conducted using data from air monitoring stations located at Poznanska street. The station is owned by the Provincial Inspectorate for Environmental Protection (VIEP) in Bydgoszcz. The studies have shown that the annual average concentration of particulate matter analyzed station in Bydgoszcz in the years 2013–2015 amounted to PM10 41 μg/m3 PM2.5 and 23 μg/m3. The results are on the borderline of acceptable levels of concentration resulting from the Regulation of the Minister of the Environment of 2 August 2012. The concentrations of particulate matter in ambient air are strongly associated with meteorological conditions. The definitely higher concentrations observed in the autumn-winter season. The decrease in temperature causes the combustion in the boiler house of fuels with a high emissions. The highest average daily concentration of suspended particulate matter was observed on Thursday and Friday in the winter months, and while the lowest concentration was recorded in the summer months.

BREEDING POND OF CARP AND ITS EFFECT ON MICOLOGICAL STATUS OF WATER

The aim of the study was to assess the impact of carp pond culture on mycological condition of surface waters. The study was conducted in a fish farm in Ślesin. To indicate the number of fungi the water was sampled at the tributary, ponds production and winter habitats and at the outflow. This study has shown that ponds may slightly reduce the number of fungi, as well as improve some physicochemical parameters of water.

Dynamics of quantitative variation for Escherichia coli in meat industry wastewaters

Wastewaters from the meat industry are a potential source of epidemic risk, owing to considerable amounts of chyme (the content of stomachs and intestines) and blood from beef animals. These wastes get into wastewater and further into the environment, causing a sanitary-epidemic threat. Pathogenic viruses, fungi, bacteria and parasites, which can be found in wastewaters from the meat industry, are an epidemic hazard for people and animals. Therefore, effective methods of their utilization have been sought for many years. The methods used so far are too energy-consuming and material intensive (GERBA & BITTON 1984).