Spring burning of meadows and wasteland vegetation makes every year a big problem associated with the risk of fire. The negative impact of fire on the ecosystem is also often stressed. In a field experiment located in the Prandocin village the influence of a controlled burning on selected elements of habitat and species composition of the meadow sward was investigated. The effect of fire was compared to mowing, mowing and removal biomass and lack of treatment. The highest maximum temperature during the burning (600 ° C) was recorded at a height of 15 cm, above soil surface, that is a short distance above the biomass. The temperature at the soil surface did not exceed 400 ° C and at a depth of 5 cm below the soil the temperature only slightly increased (up to 35 C °). There were no statistically significant differences of treatments in terms of yield and soil moisture measured two weeks after burning. However, the soil was heated significantly faster in plots burned and cut with the removal of biomass. The plant species composition did not differ significantly between treatments of the experiment. The main reason for the modest effect of burning may be a small ...
This study was aimed to conduct an analysis of the efficiency of pollutant elimination in the Dobra treatment plant, which operates based on the SBR reactor. The object purifies domestic sewage and pre-treated industrial sewage from a slaughterhouse within the Dobra municipality. The source material for the analysis comprised the values of pollution indicators: BOD5, CODCr, total suspended solids (TTS) in raw sewage (19 samples) and treated sewage (34 samples). The results of chemical analyses were obtained in the period 2007-2014. The results were compared with the limit values imposed by the Regulation (2014). The coefficient of reliability of the treatment plant was also calculated in this study. The average efficiency of pollutant elimination in the treatment plant was: BOD5 - 98.6%, CODCr - 94.9%, total suspended solids - 97.6%. These results demonstrate that the studied facility operates flawlessly and the treatment efficiency is high. On the other hand, the reliability coefficient values indicate that the operation of this object is unstable. ...
