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1

Application of selective and porous materials for the removal of biogenic compounds and indicator bacteria from domestic wastewater

100%
Dacewicz E.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2018
|
tom 17
|
nr 2
In the paper we present the evaluation of the effectiveness of the removal of biogenic compounds and indicator bacteria from domestic sewage in a vertical flow filter with a variety of fillings. The research was carried out on expanded clay, zeolite, calcined siliceous limestone, and crushed PET flakes. Based on the study of raw and treated wastewater, the effectiveness of removal of ammonium nitrogen, orthophosphates, Escherichia coli, and coliform bacteria was determined according to the selectivity, porosity and grain size of the fill. In the case of removing biogenic compounds, the most effective fillers were found to be of natural porous selective materials, such as zeolite and calcined siliceous limestone. They produced a very high removal rate of ammonium and orthophosphate, amounting to 75.34%, and over 79%, respectively. It has been demonstrated that the filter that was filled with natural porous material of fine particle size (the zeolite) was the most suitable for the removal of indicator bacteria. A very high degree of the Escherichia coli (99.98%) and coliform bacteria (99.94%) reduction was obtained.
2
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Application of the filtration bed with a foamsand filling for treatment of sewage with an elevated concentration of ammonia nitrogen

100%
Dacewicz E.
Infrastruktura i Ekologia Terenów Wiejskich
|
2019
|
tom 16
|
nr III/1
3

Water treatment in an integrated coagulation-microfiltration system, as illustrated with the example of the water treatment plant in Jaroslaw

63%
Dacewicz E., Janowski M.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2018
|
tom 17
|
nr 2
The aim of the present work was to assess the functioning of the integrated treatment process of surface water in the Water Treatment Plant (ZUW) in Jarosław between 2008–2015. The application of factor analysis made it possible to reduce the number of random variables down to the set described by four principal components, including two variables related to the bacteriological quality of water. It was observed that the removal of the component bacteria in 2011–2015 (after the modernization of the Water Treatment Plant), during the filtration and disinfection process, was 100% effective. Microfiltration membranes with a nominal pore size of 0.1 μm proved effective in removing both protozoa and pathogenic bacteria from the captured water. The use of the microfiltration technique in the coagulation-integrated system has increased the effectiveness of the conventional disinfection of surface water.
4

Application of a double layer sand filter with a PUR foams layer in the treatment of domestic sewage with an increased content of ammonia nitrogen

63%
Dacewicz E., Jurik L.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2019
|
tom 18
|
nr 2
Aim of the study The aim of the study was to determine the possibility of using PUR polyurethane foams as an upper layer of sand filter for the treatment of domestic sewage with an elevated concentration of ammonia nitrogen Material and methods The working of filtration beds factory-filled with a new stiffened filling or with mechanically ground PUR waste was compared. The efficiency of removal of the septic tank pre-treated organic and biogenic compounds as well as of total suspended solids and pathogenic bacteria from sewage with a hydraulic load varying from 31.8 to 229.2 mm³ ∙ mm⁻² ∙ d⁻¹ was determined. Results and conclusions It was shown that after ten months of working, polyurethane and sand filters filled in the upper layer with pieces of polyurethane foam in casings, achieved high efficiency of organic substance removal (BOD₅ reduction by 88% on average and CODCr by 66%). The use of polyurethane waste in the upper layer of the filter bed made it possible to remove N-NH₄⁺ ions by an average of 78%, whereas single-layer sand filters proved to be equally effective only in the first two stages of the research. It was found that the additional filling of vertical flow filters in the form of PUR foam clipping placed in casings provided favourable conditions for the development of both heterotrophic bacteria and nitrifying bacteria without the need for additional aeration. The applied upper layer of foams in combination with the lower layer of sand allowed for a very high removal of pathogenic bacteria: Escherichia coli on average 98.8%, while coliform bacteria on average 95.0%.
5

Data clustering analysis in the assessment of wastes using in the sewage filtration

63%
Bedla D., Dacewicz E.
Journal of Water and Land Development
|
2019
|
nr 41
6

Assessment of efficiency of rural sewage treatment plant with bioreactor

51%
Cupak A., Chmielowski K., Bugajski P., Dacewicz E.
Acta Scientiarum Polonorum. Formatio Circumiectus
|
2019
|
tom 18
|
nr 1
Research aims The aim of the conducted research was to assess efficiency of sewage treatment in rural areas in a sewage treatment plant with a sequencing batch reactor (SBR). Materials and methods Assessment of effectiveness of wastewater disposal in a treatment plant was carried out using elements of reliability theory. Research covered a period from March 2014 to December 2015. The content of pollution indicators in treated wastewater was compared with limit values included in the Regulation of the Minister of the Environment of November 18, 2014. Reliability analysis was performed for the following pollution indicators: BOD₅, CODCr and total suspended solids. Reliability coefficient RF was assumed as a basis for reliability calculations. Next, technological treatment efficiency index (Pso) was calculated. Results and conclusions An analysis of treated wastewater in relation to three tested parameters proved that the treatment plant works properly. Limit values of examined indicators – included in the Regulation (Dz. U. 2014 poz. 1800) – have not been exceeded. Also, all the analysed parameters have shown high percentage of pollutant reduction, ranging between 96% for CODCr and 99% for BOD₅. Obtained values of reliability indicators for the analysed treatment plant confirm its good condition.
7

Effect of parametric uncertainty of selected classification models and simulations of wastewater quality indicators on predicting the sludge volume index

51%
Chmielowski K., Bedla D., Dacewicz E., Jurik L.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 2
8
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Content available

Freshwater biodiversity crisis: macroinvertebrates’ response along the downstream gradient to receiving effluent from a wastewater treatment plant

51%
Kedzior R., Dacewicz E., Ziernicka-Wojtaszek A., Chmielowski K.
Journal of Elementology
|
2023
|
tom 28
|
nr 4
9

Uncertainty of forecast and control of activated sludge sedimentation capacity

39%
Szelag B., Studzinski J., Chmielowski K., Dacewicz E., Siwicki P., Miroslaw-Swiatek D., Lisowaska J.
Polish Journal of Environmental Studies
|
2020
|
tom 29
|
nr 2
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