In this research study, we are using CFD to better understand processes in a wastewater settling tank. Secondary sedimentation tanks belong to the most important objects at the wastewater treatment ...line. CFD plays an important part in better understanding the processes from a standpoint of operation and optimization. We conducted four CFD simulations based on a verified model of a secondary settling tank at the wastewater treatment plant in Nitra, SK. The four simulations contain four different adjustments to the inlet zone of the tank. We reached a reduction in sludge zone velocity to 6 from 12 mm/s in a representative measurement profile. We also analyze the influence of temperature-induced viscosity changes based on seasonal temperature change.
Graphical abstract
In recent decades, small domestic wastewater treatment plants have become popular in rural areas of the Slovak Republic. The reason for the expansion of decentralized wastewater management is that ...many rural areas have scattered settlements, and a centralized wastewater disposal system is economically, technically demanding, and inefficient. The disadvantage of using small domestic treatment plants in terms of environmental protection is that these facilities have yet to be significantly monitored. Due to improper operation and maintenance, they can have a long-term negative impact on the environment and jeopardize the quality of water resources. Currently, a new law amendment is being introduced in Slovakia to promote regular inspections of these facilities. The aim of this contribution is to summarize the knowledge in the field of decentralized wastewater treatment in rural areas, present the new legislative framework, and focus on the need to develop a methodology for addressing identified problematic sites and proposing measures to ensure the good condition of groundwater and surface water in the territory of the Slovak Republic.
Energy Balance of WWTP Using LCA Analysis Hrudka, Jaroslav; Škultétyová, Ivona; Dubcová, Mária ...
International journal of engineering research in Africa (Print),
03/2020, Letnik:
47
Journal Article
Recenzirano
In connection with the optimization of operation at the selected Wastewater Treatment Plant (WWTP), it is important to perform an energy audit with an assessment of the use of electricity and the ...subsequent economic optimization of the equipment of the WWTP. We can perform the energy balance through Life Cycle Assessment (LCA) analysis in relation to EN ISO 140 40 1.The aim of this study case is the analysis of the energy balance of WWTP. The appraisal was performed on three different interpretation variants of specific electricity consumption. The conclusion is a comparison of variants of quantification of specific electricity consumption.
LCA STUDY OF ENVIRONMENTAL IMPACTS OF WWTP Csicsaiová, Réka; Holubec, Michal; Gregušová, Veronika ...
Czech Journal of Civil Engineering,
03/2023, Letnik:
3, Številka:
2
Journal Article
Recenzirano
Odprti dostop
This article reviews the environmental impacts of the wastewater treatment plant. The wastewater treatment plant is evaluated using a simplified LCA analysis, as only negative environmental ...impacts are assessed. The analysis takes place in 4 phases, which is interconnect and interact with another. It is important to correctly specify input data such as a functional unit, reference flow, system boundaries. Subsequently, a characterization model of the product system is created, what presents the wastewater treatment process with all input parameters.
ANALYSIS OF MICROPOLLUTANTS IN URBAN WATER RUN-OFF Hrudková, Lenka; Wittmanová, Réka; Škultétyová, Ivona ...
International Multidisciplinary Scientific GeoConference : SGEM,
01/2023, Letnik:
23, Številka:
3.1
Conference Proceeding
Changing climatic conditions in urbanized areas enormously impact the quality of life in urbanized areas. Persistent prolonged dry periods, extreme downpours with heavy heaviness or prolonged ...rainfall are an extreme problem for effective water management in cities. Extreme weather changes also risk the environment when infiltrating or relieving highly contaminated water from the first run-off. These wastewaters are a potential source of groundwater and surface water pollution in which various pollutants are concentrated. In our research, we focus on evaluating water quality from surface run-off with an emphasis on concentrations of micropollutants. The analyses aim to assess concentrations of heavy metals, microplastics, and other pollutants in surface run-off concerning recipient water quality and groundwater quality. The research focuses on evaluating the current state of stormwater management in urbanized areas with a focus on the spread of pollution and the possibility of capturing such contaminated water with subsequent disposal to a wastewater treatment plant.
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