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1

Treatment of liquid manure with activated sludge by adding municipal waste waters

100%
Roginski W.
Annals of Warsaw Agricultural University. Land Reclamation
|
1987
|
tom 23
2
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Analiza N2O i CO2 wydzielanych z gleby lessowej po wprowadzeniu ściekow miejskich

86%
Stepniewska Z., Ostrowska A., Pasztelan M., Kotowska U.
Acta Agrophysica
|
2001
|
tom 57
3
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Aktywność katalazowa gleby torfowo- murszowej irygowanej wodami ściekowymi

86%
Brzezinska M.
Acta Agrophysica
|
2001
|
tom 57
4

Municipal wastewater treatment plant with activated sludge tanks aerated by CELPOX devices as a source of microbiological pollution of the atmosphere

86%
Filipkowska Z., Janczukowicz W., Krzemieniewski M., Pesta J.
Polish Journal of Environmental Studies
|
2002
|
tom 11
|
nr 6
This paper characterizes the influence of a wastewater treatment plant with activated sludge aerated by CELPOX devices on the microbiological properties of the air at the plant grounds and in the vicinity. Field studies by the sedimentation method were carried out in seven measurement series in 2001. Sampling posts were each time set with regard to the current meteorological conditions like wind speed and wind direction. Microbiological analyses were comprised of: heterotrophic bacteria at 37şC and 26şC, hemolytic bacteria at 37şC and 10şC, staphylococci mannitol-fermenting and non-fermenting, Escherichia coli, coliforms Pseudomonas, enterococci, actinomycetes, yeasts and moulds. The results indicate that generally - in accordance with the Polish Standards [1,2] the air at the plant grounds and in its vicinity was not polluted. However, few spots (mostly in some distance from the plant) were detected where a group of microorganisms was present in increased numbers which has qualified the air as polluted. Biological aerosols from the activated sludge tanks were not generated in considerable amounts, which was confirmed by the absence or small number of faecal bacteria (coliforms, enterococci), absence of mannitol-fermenting straphylococci and typical water-sewage bacteria of the Pseudomonas fluorescens. The main sources of microbiological pollution were the grit removal chamber and the secondary settlers.
5

Assessment of readily biodegradable organic matter in Vilnius municipality's wastewater: a case study

72%
Dauknys R., Matuzevicius A., Nemanyte J., Valentukeviciene M.
Annals of Warsaw Agricultural University. Land Reclamation
|
2005
|
tom 36
6

Qualitative and quantitative changes of potentially pathogenic fungi in a hydrophyte wastewater treatment plant

72%
Biedunkiewicz A., Ozimek T.
Polish Journal of Environmental Studies
|
2009
|
tom 18
|
nr 2
161-166
Undertaken studies on diversity and prevalence of yeast-like fungi aimed at presenting the role of a hydrophyte treatment plant in cleaning municipal wastewater from potentially pathogenic fungi. One hundred and six isolates of fungi were obtained. The highest diversity of species was found in the sedimentation tank and in I and II reed beds. The dominating species were: Trichosporon beigelii, Candida albicans, Candida glabrata, Candida dubliniensis, Candida krusei, Candida utilis and Candida lipolytica – isolated also from hospitalized patients. The number of fungal cells decreased progressively from uncountable in the sedimentation tank to 2,060 cfu/dm³ in the polishing pond. Reduction of the number and changes in species composition of yeasts like fungi take place in the hydrophyte treatment plants.
7

Basin water management in a coastal karst area

72%
Tadic M., Filipovic S.
Polish Journal of Environmental Studies
|
2011
|
tom 20
|
nr 2
The mediterranean’s karst basin waters is the topic of this research paper. The aim of the research is to help protect the karst underground waters through wastewater management of the basin’s area. The main difficulty for our research was a shortage of knowledge in the identification of the karst’s hydrological system, such as in the case of a researched system where the system’s inlet and outlet are not completely known and the whole system is only partially explained from hydrogeological and hydrological aspects. For the research spot we chose a particular karst basin. Municipial wastewaters are discharged into the basin without any purification and, after being held in the underground, they appear at the spring that supplies water for the biggest lake in the Balkans. Correlation data between low water and the characteristics of the basin (i.e. hydrological balance analysis data of specific capacity) do not exist. A series of hydro-chemical measurements at low water were undertaken in parallel at the inlet and the outlet in order to determine this correlation by an input-output balancing of pollutants’ load calculating their mass flow. The hold time of pollutants in the underground karst water was determined by correlating the particular water quality indexes. Hold time amounts to 55 to 78 hours, depending primarily on the water ingredient features.
8

Comparison of flat-sheet and hollow-fiber membrane modules in municipal wastewater treatment

72%
Bodik I., Blst'akova A., Dancova L., Sedlacek S.
Polish Journal of Environmental Studies
|
2009
|
tom 18
|
nr 3
331-340
The aim of this study was to test membrane modules immersed in pilot-scale domestic WWTP and in the aeration zone of the municipal WWTP Devínska Nová Ves - Bratislava. The first three phases were operated long-term without the employment of additional aeration. The fourth and fifth phases were operated with the employment of additional aeration applied as membrane cleaning in order to prevent the membrane from clogging. The operation of flat-sheet and hollow-fiber membrane modules showed similar results in permeate characteristics. Membrane modules were able to remove organic matter (as much as 92%) and more than 98% of NH₄-N in the long-term operation without activated sludge removal.
9

Role of primary sludge hydrolysis in energy recovery from municipal wastewater sludge

72%
Rybicki S. M.
Polish Journal of Environmental Studies
|
2014
|
tom 23
|
nr 3
Laboratory experiments supported by full-scale operational observations have been utilized to assess the possible yield of methane-rich biogas via decomposition of COD and volatile fatty acids (VFAs) from organic matter trapped and settled in a municipal wastewater treatment plant. The impact of operational conditions (mainly solids' retention time) on VFAs and methane-rich gas generation was estimated by fractionation of COD in sludge and supernatant. Assessment of efficiency of this process was done by steady state measurements of COD solubilization. Full-scale investigations supported by laboratory tests enlightened some specific operational problems that may occur in wastewater treatment plants with an intensive acidic hydrolysis. Relatively high consumption of biodegradable carbon is usually one of adverse and unfavorable effects.
10
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Impact of wastewater application on magnetic susceptibility in Terric Histosol soil

72%
Sokolowska Z., Alekseev A., Skic K., Brzezinska M.
International Agrophysics
|
2016
|
tom 30
|
nr 1
11

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

72%
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.
12
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Emisja metanu z udziałem Salix americana uprawianej na polach irygowanych ściekami miejskimi.

72%
Przywara G., Stepniewska Z.
Acta Agrophysica
|
2001
|
tom 57
13

Removal of organic compounds from municipal wastewater by immobilized biomass

72%
Zielinska M., Wojnowska-Baryla I.
Polish Journal of Environmental Studies
|
2004
|
tom 13
|
nr 5
Two porous ceramic carriers (internal active surface 0.04 m2 for carrier I and 0.2 m2 for carrier II) with immobilized activated sludge were the stationary filling of the reactors. Municipal wastewater was treated at hydraulic retention time (HRT) from 70 to 15 min. The efficiency of organic compounds removal from wastewater changed for reactor I from 85.2 to 93.8%, for reactor II from 62.9 to 87.1%. The contribution of oxidation, biomass synthesis, denitrification and intracellular storage in organic compounds removal depended on the type of carrier and on hydraulic retention time (HRT). Over 20% of organic loading in influent to reactors I and II was used for cellular oxidation. Only for reactor I at HRT 30 and 15 min higher participation of nitrate respiration than oxygen was one observed. From 6.1 to 14.5% of loading in influent was removed as a result of sludge yield. For reactor I the high contribution of intracellular storage in organic compounds removal from wastewater was observed.
14
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Methane and carbon dioxide emissions from a loess soil treated with municipal waste water after second step of purification

72%
Stepniewska Z., Nosalewicz M., Ostrowska A.
International Agrophysics
|
2003
|
tom 17
|
nr 1
15
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Plant contribution to methane emission after irrigation of peat soil with municipal waste water

72%
Przywara G., Stepniewska Z.
International Agrophysics
|
2002
|
tom 16
|
nr 3
16

The leachate influence on nutrients and organics removal efficiency, structure and composition of the microfauna in activated sludge treating municipal wastewater

72%
Kulikowska D., Klimiuk E., Drzewicki A.
Archiwum Ochrony Środowiska
|
2005
|
tom 31
|
nr 1
17
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Attempt to use the SWATREZ and UNDYS models for the simulation of ground water pollution in agrosystems irrigated by municipal sewage

72%
Glinski P., Kowalski D., Olszta W.
International Agrophysics
|
2003
|
tom 17
|
nr 1
18

Aerobic sludge digestion in the presence of hydrogen peroxide and Fenton's reagent

72%
Barbusinski K., Filipek K.
Polish Journal of Environmental Studies
|
2003
|
tom 12
|
nr 1
The results of comparative experiments on aerobic digestion of excessive activated sludge using hydrogen,peroxide and Fenton’s reagent are described. Fenton’s reagent was found to have a higher oxidation potential and, as a consequence, higher efficiency in a digestion process in comparison to hydrogen peroxide. Moreover, Fenton’s reagent was shown to improve sedimentation properties of sludge and to decrease soluble COD more efficiently than H2O2. The main advantage of the Fenton’s reagent application was the fact that oxidation processes took place even though Fenton’s reagent was no longer added. On the other hand, the apparent disadvantage of its application is the formation of additional chemical sediments and possible decomposition of sludge flocs as a result of overdosage of reagents and, consequently, an increase in turbidity of supernatant liquid and some difficulties with sludge dewatering.
19

Dehydrogenase and catalase activity of soil irrigated with municipal wastewater

72%
Brzezinska M., Stepniewska Z., Stepniewski W.
Polish Journal of Environmental Studies
|
2001
|
tom 10
|
nr 5
Dehydrogenase and catalase activities were measured in a Eutric Histosol irrigated with municipal wastewaters (Lublin, Poland) purified by a two-step (mechanical and biological) treatment. Soil enzyme activity was used to test the biochemical status of the soil-plant system, the last step of wastewater purification. Three experimental fields, each of I ha area, were planted with Populus nigra, Salix americana, and grasses (with Alopecurus pratensis, Phalaris arundinacea, Festuca pratensis as dominating species). The fields were divided into three parts: not flooded control (A), flood-irrigated 10 times per year with 60-75 mm (B), and flood-irrigated 10 times per year with 120-150 mm (C) of wastewater per irrigation. The enzyme activity was measured several times during the first 2 years of wastewater application in soil sampled from control and flooded plots (0-10, 10-30, 30-50, 50-70 cm depth). Simultaneously, redox potential at the same depths was measured with permanently installed Pt electrodes. Irrigation with municipal wastewater elevated soil dehydrogenase activity on average by 44% and 27% for the low and high irrigation doses, respectively, but reduced catalase activity at the high irrigation dose on average by 12.4% (significant at P < 0.001). Plant cover significantly influenced soil dehydrogenase and catalase activities.
20

Structure of the solute yield in the Vistula River basin with special regard to anthropogenic components

72%
Maruszczak H., Wilgat M.
Geographia Polonica
|
1997
|
tom 68
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