The aim of this experiment was to establish the effect of the ProBio Origi-nalTM preparation (hereinafter "preparation") on the composting process of bio-logically degradable waste in garden composters. The first stage of research was focused on the effect of different concentrations of the preparation onto the com-posting process in garden composters. Monitored parameters were the effect of the preparation on the course of temperatures during the composting process, material volume decrease and effect on the quality of the composted material. The input raw material was freshly cut grass provided by Centrální kompostárna (Central Composting Plant) Brno, a.s. The experiment was carried out in five garden composters (290 L) for a pe-riod of 13 weeks. Three composters were enriched with the preparation at different concentrations, two of them were reference composters.During the experiment, the course of the composting process was monitored (temperature, loss in material volume) as well as the compost quality (C/N ratio, nutrients, heavy metals). During the experiment, a positive influence was observed of the preparation on the course of temperature in the composters. The enriched composters reached in the mineralization phase the thermophilic temperature ranges for a period of two weeks.The rate of composted material volume reduction in ...
The research was carried out on the section of the watercourse located in the village Mostowo. Watercourse flows through the pipe at a certain distance. The study was carried out on the uncanalized part with length of 1022 m. At this section the three measuring points were established. Bottom sediments were analyzed for the contents of selected heavy metals, such as: Cd, Co, Cr, Cu, Ni, Pb, Zn. Using the maximum concentrations of heavy metals in the analyzed sediment samples the evaluation of watercourse sediment contamination was done. The aim of the study was the assessment of sediments contamination and indication on possibilities of their utilization. The obtained results indicate that the highest concentrations of heavy metals in the sediments were in samples taken from a point located near the business buildings, allotments and near the seed headquarters (P-1) in a layers 5-10 and 20-30 cm. The results indicate that the studied sediments differently accumulated the heavy metals depending on the location of sampling points. That accumulation can be expressed by different series of heavy metals concentration in the sediment. For the point P 1 it takes the following form: Zn> Pb> Cu> Cr> Ni> Co> Cd, for the point ...
