The aim of this study was to analyse the impact of velocity in the hydroponic lagoon used as the ... more The aim of this study was to analyse the impact of velocity in the hydroponic lagoon used as the 3rd stage of municipal wastewater treatment on washing out of the particles suspended in the sewage as well as settled on the bottom of the hydroponic ditch. In order to analyse the flow velocity in the lagoon, 12 cross-sections were determined at points where the speed and motion of particles can change. Wastewater samples were taken in the summer month from each of the 12 sampling points (the depth of 0.1 m) and the basic physicochemical parameters of sewage were determined (BOD5, COD, TOC, TSS, turbidity). In selected cross-sections, a granulometric analysis of particles was made to determine the characteristics of suspended solids in the wastewater flow path. Based on the analysis, it was found that velocities in the lagoon during aeration can be ten times higher (0.070 m·s−1) than those assumed by designers (0.006 m·s−1). Such a large difference means that the sedimentation conditio...
The aim of the study was to evaluate removal efficiency of nitrogen and phosphorus compounds by f... more The aim of the study was to evaluate removal efficiency of nitrogen and phosphorus compounds by floating islands with macrophytes and influence of LED lights imitating the photosynthetically active radiation (PAR) on that effectiveness. Improving removal efficiency is crucial, thanks to ever-tightening legal requirements. Main reason for that is growing problem of eutrophication phenomenon. Nowadays, this problem is visible not only in lakes and ponds but also in water courses and coastal water. Study was conducted during time of 15 weeks. In that time, listed parameters were tested: pH, conductivity, total nitrogen, organic nitrogen, ammonium nitrogen, nitrite nitrogen, nitrate nitrogen, total phosphorus, and phosphates. Each tank was filled with same amount of biologically treated wastewater; ambient temperature and dissolved oxygen concentrations were kept in same range for the time of experiment. Average concentrations of main pollutants in tanks with LED lighting have reached: ...
The rivers of agricultural catchment areas are particularly vulnerable to eutrophication, which c... more The rivers of agricultural catchment areas are particularly vulnerable to eutrophication, which causes nitrate nitrogen (N-NO3) that can be easily leached from the cropland. In 1991, the EU implemented the Nitrates Directive (ND) to identify and reduce the negative effects of nitrates in water. According to this regulation, in 2018, the whole territory of Poland was classified as Nitrate Vulnerable Zone (NVZ). The aim of the study was to assess the validity of the introduction of NVZs in large areas of the river catchment level. Statistical data on agricultural changes for individual provinces of Poland and for the whole country were analyzed. A one-way analysis of variance (ANOVA) was used to assess the N-NO3 content in the water at different locations along the river within four rivers in the Odra basin. The results indicated that higher concentrations are observed in the upper part of the studied catchments, which reached a maximum of 25.0 mg N-NO3·dm−3. However, average values r...
W pracy przedstawiono zmiany wybranych parametrow ściekow bytowych dowozonych taborem asenizacyjn... more W pracy przedstawiono zmiany wybranych parametrow ściekow bytowych dowozonych taborem asenizacyjnym do malej gminnej oczyszczalni ściekow, zlokalizowanej w gminie wiejskiej woj. dolnośląskiego. Obserwacje obejmowaly okres od lipca 2011 r. do czerwca 2012 r. Dane o skladzie i objetości ściekow notowane byly podczas kazdorazowego przyjecia ściekow na stacje zlewczą. Obserwowana oczyszczalnia ściekow zaprojektowana zostala docelowo jako obiekt przyjmujący nieczystości ze skanalizowanych miejscowości objetych planem aglomeracji, ujetym w Krajowym Programie Oczyszczania Ściekow Komunalnych. Przepustowośc obiektu w 2015 r. wynosic bedzie 1 558,1 m3d-1. W skladzie ściekow dowozonych taborem uwidacznia sie sezonowa zmiennośc dotycząca temperatury oraz odczynu. Przewodnośc ściekow przyjmowanych przez stacje zlewczą oczyszczalni w ciągu roku obserwacji nie charakteryzowala sie istotnymi roznicami statystycznymi. Udzial ściekow bytowych dowozonych w stosunku do doplywających przewodami kanaliz...
The aim of research was to evaluate changes in the particle size distribution in two hydroponic l... more The aim of research was to evaluate changes in the particle size distribution in two hydroponic lagoons working as a third stage of wastewater treatment where purification processes are based on plants and algae activity. Wastewater samples were taken during the winter and summer half of the year. In the samples taken from analyzed hydroponic lagoons the range of particles size was very wide (0.01 – 1000.0 μm). In both of the research facilities, the fractal dimension (Df) of particles was close to 2.0 what decides about developed surface of the particles. The results may indicate the predominance of algae cells in the total amount of suspensions. This information may pay a key role in determination the impact of discharged particles on the receiving water bodies quality as well as can be the main factor that allows to improve the system of suspended solids removal.
The aim of this study was to analyse the impact of velocity in the hydroponic lagoon used as the ... more The aim of this study was to analyse the impact of velocity in the hydroponic lagoon used as the 3rd stage of municipal wastewater treatment on washing out of the particles suspended in the sewage as well as settled on the bottom of the hydroponic ditch. In order to analyse the flow velocity in the lagoon, 12 cross-sections were determined at points where the speed and motion of particles can change. Wastewater samples were taken in the summer month from each of the 12 sampling points (the depth of 0.1 m) and the basic physicochemical parameters of sewage were determined (BOD5, COD, TOC, TSS, turbidity). In selected cross-sections, a granulometric analysis of particles was made to determine the characteristics of suspended solids in the wastewater flow path. Based on the analysis, it was found that velocities in the lagoon during aeration can be ten times higher (0.070 m·s−1) than those assumed by designers (0.006 m·s−1). Such a large difference means that the sedimentation conditio...
The aim of the study was to evaluate removal efficiency of nitrogen and phosphorus compounds by f... more The aim of the study was to evaluate removal efficiency of nitrogen and phosphorus compounds by floating islands with macrophytes and influence of LED lights imitating the photosynthetically active radiation (PAR) on that effectiveness. Improving removal efficiency is crucial, thanks to ever-tightening legal requirements. Main reason for that is growing problem of eutrophication phenomenon. Nowadays, this problem is visible not only in lakes and ponds but also in water courses and coastal water. Study was conducted during time of 15 weeks. In that time, listed parameters were tested: pH, conductivity, total nitrogen, organic nitrogen, ammonium nitrogen, nitrite nitrogen, nitrate nitrogen, total phosphorus, and phosphates. Each tank was filled with same amount of biologically treated wastewater; ambient temperature and dissolved oxygen concentrations were kept in same range for the time of experiment. Average concentrations of main pollutants in tanks with LED lighting have reached: ...
The rivers of agricultural catchment areas are particularly vulnerable to eutrophication, which c... more The rivers of agricultural catchment areas are particularly vulnerable to eutrophication, which causes nitrate nitrogen (N-NO3) that can be easily leached from the cropland. In 1991, the EU implemented the Nitrates Directive (ND) to identify and reduce the negative effects of nitrates in water. According to this regulation, in 2018, the whole territory of Poland was classified as Nitrate Vulnerable Zone (NVZ). The aim of the study was to assess the validity of the introduction of NVZs in large areas of the river catchment level. Statistical data on agricultural changes for individual provinces of Poland and for the whole country were analyzed. A one-way analysis of variance (ANOVA) was used to assess the N-NO3 content in the water at different locations along the river within four rivers in the Odra basin. The results indicated that higher concentrations are observed in the upper part of the studied catchments, which reached a maximum of 25.0 mg N-NO3·dm−3. However, average values r...
W pracy przedstawiono zmiany wybranych parametrow ściekow bytowych dowozonych taborem asenizacyjn... more W pracy przedstawiono zmiany wybranych parametrow ściekow bytowych dowozonych taborem asenizacyjnym do malej gminnej oczyszczalni ściekow, zlokalizowanej w gminie wiejskiej woj. dolnośląskiego. Obserwacje obejmowaly okres od lipca 2011 r. do czerwca 2012 r. Dane o skladzie i objetości ściekow notowane byly podczas kazdorazowego przyjecia ściekow na stacje zlewczą. Obserwowana oczyszczalnia ściekow zaprojektowana zostala docelowo jako obiekt przyjmujący nieczystości ze skanalizowanych miejscowości objetych planem aglomeracji, ujetym w Krajowym Programie Oczyszczania Ściekow Komunalnych. Przepustowośc obiektu w 2015 r. wynosic bedzie 1 558,1 m3d-1. W skladzie ściekow dowozonych taborem uwidacznia sie sezonowa zmiennośc dotycząca temperatury oraz odczynu. Przewodnośc ściekow przyjmowanych przez stacje zlewczą oczyszczalni w ciągu roku obserwacji nie charakteryzowala sie istotnymi roznicami statystycznymi. Udzial ściekow bytowych dowozonych w stosunku do doplywających przewodami kanaliz...
The aim of research was to evaluate changes in the particle size distribution in two hydroponic l... more The aim of research was to evaluate changes in the particle size distribution in two hydroponic lagoons working as a third stage of wastewater treatment where purification processes are based on plants and algae activity. Wastewater samples were taken during the winter and summer half of the year. In the samples taken from analyzed hydroponic lagoons the range of particles size was very wide (0.01 – 1000.0 μm). In both of the research facilities, the fractal dimension (Df) of particles was close to 2.0 what decides about developed surface of the particles. The results may indicate the predominance of algae cells in the total amount of suspensions. This information may pay a key role in determination the impact of discharged particles on the receiving water bodies quality as well as can be the main factor that allows to improve the system of suspended solids removal.
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