Authors:Veronika Gregušová, Ivona Škultétyová and Michal Holubec
Settling tanks are essential parts of wastewater treatment process and their correct design is therefore crucial for its operation. Modeling of flow in these tanks is difficult, therefore it is necessary to find right tool to perform as precise work as possible. In this article flow velocity measurement in two different secondary settling tanks in Slovakia is presented. Rectangular settling tank in Dolný Kubín and radial settling tank with horizontal flow in Nižná nad Oravou were chosen for this purpose. Data gained from these measurement events will be used for building a model and followed by simulation. Additional data from operation of wastewater treatment plants are also used during the work.
Authors:Mária Dubcová, Kristína Galbová and Ivona Škultétyová
The essence of the application of the life cycle assessment study is to avoid increasing the quality of individual products and services at the expense of environmental degradation. Life cycle assessment is regarded as a universal method that is useful for any organization, regardless of the nature and scope of business. The effectiveness of wastewater treatment can determine and assesses potential risks associated with operation of wastewater treatment plant to the environment using appropriate methodology. The implementation of the method requires formulizing processes, using exact methods, allowing identifying the environmental impacts on the environment. Life cycle assessment belongs in industrialized and environmentally conscious states among ordinary tool of environmental management.
The scientific part is the introduction of general standards for specific wastewater treatment plant. The emphasis is given on correct understanding of the problem, regarding the definition of objectives, functional unit, system boundaries, and evaluation indicators. Based on the monitoring and measurement of pollutants in samples of wastewater, the data is processed by the competent life cycle assessment software.
Authors:Dušan Rusnák, Štefan Stanko and Ivona Škultetyová
Appraisals results of divided and combined rain sewers highly depend on the appropriate choice of model rain. The goal of this research is to verify the impact of different rain models on results of rainfall totals, calculated flow in the network and in their overall effect on the assessment. This research focuses on three main rain models - block rain (reduced), a synthetic rain and actual historical rain with data collected from meteorological stations allocated in the area of Vráble. Historical rain event for the area has been chosen as the one with highest overall intensity with duration of at least 1 hour. Modeling process has been conducted in interface of MIKE URBAN software.
Authors:Mária Trošanová, Ivona Škultétyová and Dušan Rusnák
Reverse logistics is one of the main processes for the realization of the circular economy. The aim is ensuring the material recovery of waste through its re-use or recycling in a way that is environmentally friendly and economically interesting. The municipality is responsible for the waste management of municipal waste streams. This paper deals with an efficiency of municipal expenditures dedicated to waste management from the expenditures allocated for environmental protection and the achievement of waste management objectives.