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1

Comparison of the airborne spread of coliform and hemolytic bacteria around a sewage treatment plant

100%
Kocwa-Haluch R.
Annals of Agricultural and Environmental Medicine
|
1996
|
tom 03
|
nr 1
2

Settling properties of activated sludge from a sequencing batch reactor [SBR]

100%
Janczukowicz W., Szewczyk M., Krzemieniewski M., Pesta J.
Polish Journal of Environmental Studies
|
2001
|
tom 10
|
nr 1
The purpose of this work was to examine the settling properties of activated sludge from a sequencing batch reactor (SBR). The experiments were carried out in a bench-scale reactor, fed with wastewater from the University of Olsztyn treatment plant. Concentrations of the examined activated sludge varied between 2.5 and 6.0 kg SS m-3. Laboratory analyses of the sludge comprised: sludge concentration, settleability, sedimentation velocity and sludge volume index (SVI). The study revealed very good settling properties of the sludge. Low SVI (30 - 60 ml g-1 SS) was responsible for an intensive and quick sedimentation which shortened the settle phase to less than one hour. Moreover, low SVI prevented the sludge from bulking. High dissolved oxygen concentrations in the aeration tank during the react phase resulted in little sludge biomass growth, which is very important from the viewpoint of sludge disposal at a wastewater treatment plant.
3
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Waste management problems on an example of small sewage treatment plants

84%
Wira J., Wira D.
Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
|
2003
|
tom 06
4

Zooplankton exported from retention reservoirs at the post-production waste water treatment plant

84%
Czerniawski R.
Electronic Journal of Polish Agricultural Universities. Series Fisheries
|
2008
|
tom 11
|
nr 4
5

Evaluation of effectiveness of hydrophytic wastewater final cleaning system at in Sierpc, Poland

84%
Lipinska D., Jeznach J.
Polish Journal of Environmental Studies
|
2008
|
tom 17
|
nr 3
377-381
This article is a study on final cleaning of wastewater in an experimental hydrophytic treatment plant. Wastewater was previously treated in a municipal wastewater treatment plant loaded with a significant amount of brewery sewage. This paper presents research results of the load of basic pollutants, a comparison between the effectiveness of treatment in vertical and horizontal flow plots and continuously or periodically flooded plots, the influence of brewery sewage inflow dynamics on both treatment effectiveness and treated sewage reaction. The results of the analysis indicate that the constructed wetland system is a relatively effective method. This system increases and stabilizes the efficiency of the wastewater treatment plant in Sierpc.
6

Morphology and morphogenesis of a Spanish population of Urosomoida agiliformis [Ciliophora, Hypotrichida] from a wastewater treatment plant

84%
Olmo J. L., Perez-Uz B.
Acta Protozoologica
|
2000
|
tom 39
|
nr 2
7

Observations on the morphology of Caenomorpha uniserialis Levander, 1894 [Ciliophora, Heterotrichida] isolated from a wastewater treatment plant

84%
Decamp O., Warren A.
Acta Protozoologica
|
1997
|
tom 36
|
nr 2
8

Efficiency of wastewater treatment for microbiological contaminants in the initial stage of a plant-soil treatment plant's operation

84%
Kuczewski K., Kercel-Cwalinska J., Solecki E., Nowak I.
Electronic Journal of Polish Agricultural Universities. Series Environmental Development
|
1998
|
tom 01
|
nr 1
The article presents research results gained when purifying living – economic sewage in plant – soil water treatment of 24 hour flow capacity of 110 m3.
9
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

The effect of heavy precipitation on the infiltration and inflow into small sewage treatment plants in 2010

67%
Kaczor G.
Infrastruktura i Ekologia Terenów Wiejskich
|
2011
|
nr 12
The aim of the study was to determine the extent to which heavy rainfall, that occurred in 2010, affected the infiltration into the selected sewage treatment plants in the Małopolskie voivodeship. The research was conducted in four separate sewer systems, located in poviats adjacent to the city of Kraków, discharging sewage to mechanical-biological treatment plants with a capacity below 1000 m3•d-1. The amount of sewage and extraneous water in the average wet year (2008) were used as control. As a result of heavy precipitation in 2010 the sewer system A received 18 539 m3 more extraneous water than in 2008 (increase by 343%), the sewer sys-tem B - 22 822 m3 (increase by 163%), the sewer system C - 109 715 m3 (increase by 248%) and the sewer system D - 30 796 m3 (increase by 303%). Heavy precipitation in 2010 caused the increase of infiltration and inflow by 264% on average in all studied sewer systems compared to the average wet year. As the result of precipitation, whose annual total in 2010 was higher by 65% than the normal value in 2008, there was an increase in the annual share of extraneous water from 5.3 to 19.7% depending on the facility. The volume of extraneous water, which was discharged into the studied treatment plants in 2010 (the period of heavy rainfall), constituted the following share of the annual value: in the sewer system A - 41.3%, in the sewer system B - 21.2%, in the sewer system C - 14.4%, in the sewer system D - 22.9%. Assuming the average gross amount of 3 PLN paid for treatment of 1 m3 of sewage, cost of extraneous water disposal in 2010 amounted from 78 533 PLN to 552 165 PLN, depending on the facility. The results obtained in the present study suggest that eliminating or reducing infiltration and inflow into the analyzed sewer systems would allow for large financial savings associated with reducing costs both for their transport and treatment as well as for modernization of facilities to enhance their hydraulic eapacity.
10
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Abundance and species composition of plankton in the Gulf of Gdańsk near the planned underwater outfall of the Gdańsk-Wschód (Gdańsk-East) sewage treatment plant

67%
Zmijewska M. I., Niemkiewicz E., Bielecka L.
Oceanologia
|
2000
|
tom 42
|
nr 3
The aim of this paper is to determine the current biological state of life in the pelagic zone of the Gulf of Gdańsk in relation to the planned start-up of an underwater outfall which will discharge sewage from the Gdańsk–Wschód (Gdańsk–East) sewage treatment plant. The plankton material was collected during two research cruises in July and October 1998. The samples were taken at 15 stations in four profiles located near Wyspa Sobieszewska (Sobieszewo Island), perpendicular to the coastline. Both the taxonomic and numerical structure of phytoplankton and zooplankton were typical of the coastal area of the Gulf of Gdańsk. The species diversity depends on hydrological conditions, mainly input from the River Wisła (Vistula). The abundance and biomass of phytoplankton in 1998 were several times lower than in 1994 and 1995 in the area off Górki Wschodnie, the profile located closest to the planned construction site. This could have been caused by generally lower temperatures in 1998 in comparison to previous years. In the investigated area only traces of algal eutrophication indicator species were noted. However, potentially toxic species were confirmed and were most abundant near the Wisła mouth. The highest concentrations of pelagic fauna occur in the shallowest area closest to the shoreline. Long-term observations of the dynamics of the variations in abundance and species composition indicate the increasing significance of one particular species – Acartia bifilosa.
11

Transformations of nitrogen and phosphorus in soil planted with willow irrigated with wastewater

67%
Kotowska U., Wlodarczyk T., Brzezinska M.
Archiwum Ochrony Środowiska
|
2007
|
tom 33
|
nr 2
12

Alteration of Cryptosporidium parvum [Apicomplexa: Eucoccidiorida] oocyst antigens following bleach treatment

67%
Liao S. F., Du C., Yang S., Healey M. C.
Acta Protozoologica
|
2001
|
tom 40
|
nr 4
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