Wyniki wyszukiwania - AGRO

1

Effect of composting system on the inactivation rate of Escherichia coli [EHEC] in sewage sludge

100%

Paluszak Z., Bauza-Kaszewska J., Gorski L.

Polish Journal of Natural Sciences

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2003

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tom 15

2

Isolation of polynuclear aromatic hydrocarbons from sewage sludges using the extraction method

100%

Bakowski W., Janoszka B.

Polish Journal of Environmental Studies

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1993

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tom 02

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nr 3

Determination of polynuclear aromatic hydrocarbons (PAH-s) in sewage sludges is necessary before utilizing the sludges in agriculture, especially in industrial regions. Separation of PAHs has been the most difficult step of analysis. In this work, PAHs were separated by extraction. The best extraction solvents were chosen after reviewing literature. A new method of determining the partition coefficient has been proposed and applied to check if the chosen solvents were good enough for the present purposes. The results have shown that in the case of methanol and dimethylfor- mamide, extraction was nearly complete but the problems of finding a better solvent and mixing the solvents remained.

3

Influence of stabilized sewage sludge on biomass growth of chosen species of energy plants

88%

Romanowska-Duda Z., Grzesik M., Andrzejczak, Woznicki P., Warzecha D.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

4

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Sewage sludge stabilization indicators in aerobic digestion-a review

88%

Kazmierczak M.

Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation

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2012

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tom 44

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nr 2

5

Sewage sludge particle size fractions affect keratinolytic and keratinophilic fungi

88%

Ulfig K., Plaza G., Terakowski M.

Archiwum Ochrony Środowiska

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2006

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tom 32

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nr 4

6

Fate of enterococci in composted sewage sludge

88%

Paluszak Z., Bauza-Kaszewska J., Ligocka A.

Bulletin of the Veterinary Institute in Puławy

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2004

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tom 48

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nr 1

7

Preliminary investigation for forecasting the content of polycyclic aromatic hydrocarbons after soil fertilization with sewage sludge

88%

Oleszczuk P., Baran S.

Polish Journal of Environmental Studies

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2004

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tom 13

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nr 3

In addition to the positive effects on the physical, chemical and biological soil properties of the application of sewage sludge into the soil, there is often an increase of both organic and inorganic pollutants in the soil. One of the most popular organic xenobiotics frequently present in sewage sludge are polycyclic aromatic hydrocarbons. The aim of this study is to determine possibilities for forecasting the content of individual PAHs in the soil on the basis of their content in sewage sludge. Two types of sewage sludge with different PAH contents, both in terms of quantity and quality, were examined. The different types of sludge were introduced into the soil in the following doses: 30, 75, 150, 300 and 600 t/ha. The results obtained showed a clear differentiation in the behaviour of individual PAHs in relation to the dose applied and the type of sewage sludge.

8

Heavy metal speciation in sewage sludge

88%

Jakubus M., Czekala J.

Polish Journal of Environmental Studies

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2001

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tom 10

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nr 4

Sewage sludge is a rich source of organic matter and nutrients, so there is a possibility of their broader agricultural utilization. However, agricultural utilization of this material is limited by excessive quantities of heavy metals. In accordance with this, the current paper presents the results of investigations referring to the speciation of heavy metals in selected sewage sludge. It was found that there were differences among metals in the preferential formation of bonds, but also such phenomena occurred in the individual sludge samples for the same element. This was mainly observed for cadmium and nickel. Especially important are the amounts of metals associated with water soluble plus exchangeable fraction (1 mol.L-1 NH4NO3) as well as fraction of metals extracted by 1 mol.L-1 NH4OAc (pH = 6.0), corresponding to weakly adsorbed and bound with carbonates and labile organic compounds. With reference to this, it was stated that the percentage share of such combinations decreased in the order: Cu < Cr < Zn < Cd < Ni, reaching values of 2.9, 7.2, 8.8, 19.5 and 21.6% respectively. It shows those copper forms the lowest number of fast released combinations, whereas Ni and Cd - the highest.

9

Fractions of heavy metals in soil after the application of municipal sewage sludge, peat, and furnace ash

75%

Antonkiewicz J., Pelka R.

Soil Science Annual

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2014

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tom 65

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nr 3

10

Content of magnesium and other fertilizer compounds in stabilized and dewatered sewage sludge from the Municipal Sewage Treatment Plant in Recz

75%

Dusza E., Zablocki Z., Mieszczerykowska-Wojcikowska B.

Journal of Elementology

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2009

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tom 14

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nr 1

63-70

The aim of this study was to determine the content of magnesium and other fertilizer compounds (Ca, K, Na, P, N and S) in stabilized and dewatered sewage sludge stored on dewatered sites at the Municipal Treatment Plant in Recz in 1994-2003. Discharge of post galvanic sewage to the municipal sewer system was evaluated at approximately 10% processed sewage at this treatment plant .The fertilizer value and possible utilization of the sludge was evaluated. When evaluating possible use of the sewage sludge for fertilization purposes in agriculture, it was found that the concentration of magnesium in sludge samples was in the range of 0.2-0.5, on average 0.33%, and was substantially lower than the level of this compound given in literature. The content of this compound in sewage sludge is found in the range 0.02 do 7.6% and depends on the type of a treatment plant, treatment process, and also on the share of industrial sewage. Sewage sludge applied in agriculture should be characterized by a high content of magnesium (approximately 0.6%). Some physical and chemical properties of the examined sewage sludge were very good (loose soil consistency, lack of odor, humidity from 40 to 80%, suitable pH and high concentration of Ca, K, Na, P, N and S). The reaction was in the pH range from 5.6 to 7.0 (from slightly acid to neutral), which is typical of sewage sludge obtained during the biological processing of municipal sewage. The mean content of main nutrient compounds in the sludge, which was N – 2.7%, P – 4.7 and K – 0.18%, enables classification of this material as suitable for use in agriculture. Taking under consideration the content of all macronutrients and physical properties of the sludge produced at the Municipal Treatment Plant in Recz, it can be concluded that this sewage sludge may be applied on agricultural land and used for reclamation of degraded soils. But every batch of sewage sludge should be analyzed and evaluated individually because it may contain excessive amounts of heavy metals due to periodical discharge of post galvanic sewage to municipal sewerage.

11

Migracija i transformacija FPGS v okruzhajushhejj srede pri popadanii ikh v pochvu s osadkami stochnykh bod

75%

Valkina E., Vernezi S., Nikolenko I.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2014

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tom 16

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nr 5

12

Impact of sewage sludge land application on groundwater's quality

75%

Gontaszewska A., Krainski A.

Zeszyty Naukowe Uniwersytetu Zielonogórskiego. Inżynieria Środowiska

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2004

|

nr 12[131]

13

Osad sciekowy moze byc nawozem

75%

Pecek J.

Biuletyn Informacyjno-Handlowy. Ośrodek Doradztwa Rolniczego Boguchwała

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2004

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nr 11

18

14

Characterization of natural organic colloids derived from sewage sludge

75%

Kowalkowski T.

Polish Journal of Environmental Studies

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2010

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tom 19

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nr 2

435-439

Fractionation of sewage sludge colloids has been achieved using the split-flow-thin (SPLITT) fractionation technique. It reveals that the majority of organic carbon as well as heavy metals is carried by particles smaller than 1 μm. Optimization of volumetric flowrates and application of full-feed depletion mode of SPLITT fractionation allows concentrating the smallest colloids. Additionally, HPLC and ¹³C NMR analyses has been performed to characterize the organic colloids. The ¹³C NMR spectrum confirms that smaller fraction scontained elevated contents of aliphatic, aromatic and carboxylic groups characteristic of humic compounds. HPLC analysis separates two fractions of substances and compares obtained chromatograms with separation of the humic standard.

15

Mobilnosc chromu w osadach sciekowych roznego pochodzenia

75%

Gondek K., Filipek-Mazur B.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2003

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tom 02

|

nr 1

51-60

16

Produktivnost' ivy ehnergeticheskojj pri raznykh normakh vnesenija osadkov stochnykh vod na dernovo-podzolistnykh pochvakh Karpat'ja

75%

Lopushnyak V., Hrytsulyak G.

Motrol. Motoryzacja i Energetyka Rolnictwa

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2013

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tom 15

|

nr 4

17

Dual-fuel feeding of diesel engine with generator gas and liquid fuel

75%

Cupial K., Duzynski A., Gruca M., Grzelka J., Szwaja S.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

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2011

|

tom 11

18

Nutrients and heavy metals in biochar produced by sewage sludge pyrolysis: its application in soil amendment

75%

Liu T., Liu B., Zhang W.

Polish Journal of Environmental Studies

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2014

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tom 23

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nr 1

The production of sewage sludge has been sharply increasing by municipal sludge treatment plants in China. Sewage sludge is a difficult waste to manage not only due to the high quantities produced but also due to its high concentration of heavy metals and pathogens. The pyrolytic conversion of sewage sludge to biochar and then applied to the land is a sustainable management potion. Therefore, the aim of this work is to evaluate the characteristics of nutrients and heavy metals in biochar from sewage sludge pyrolysis, and pot experiments were carried out with different treatments consisting of infertile and contaminated soils. The results showed that the content of major plant nutrients (N, P, K) in sewage sludge biochar meets agricultural requirements. The concentrations of heavy metals (Cu, Pb, Zn, Cd, and Cr) were evidently increased in biochar, but those of available heavy metals were decreased. The sewage sludge biochar can improve soil fertility and enhance plant growth while not increasing plant uptake of heavy metals, and remedied contaminated soil by reducing the plant availability of heavy metals.

19

Rheological measurements of disintegrated activated sludge

75%

Travnicek P., Vitez T., Junga P., Krcalova E., Sevcikova J., Marecek J., Machal P.

Polish Journal of Environmental Studies

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2013

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tom 22

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nr 4

Our paper deals with the description of the rheological properties of activated sewage sludge before and after disintegration. There is an assumption that disintegrated activated sewage sludge is able to change rheological properties. These changes probably cause the modification of the structure of activated sewage sludge after disintegration. The reason is that during disintegration, cell walls of organisms (from which the activated sewage sludge is composed) are disturbed. Currently there are not published many papers that deal with rheological properties of disintegrated activated sewage sludge. There is therefore no opportunity to confront our assumption with papers of other authors. The sample of activated sewage sludge was collected from aeration tank of the wastewater treatment plant for 10,000 population equivalent (PE). In our work the following rheological properties were described: temperature dependence on viscosity and the shear stress dependence on shear rate. On the basis of measured data Arrhenius mathematical model has been applied. By using this mathematical model the activation energy has been obtained.

20

Content of cadmium in maize [Zea mays L.] and soils fertilized with sewage sludges and mixtures of sewage sludge and peat

75%

Gondek K.

Polish Journal of Natural Sciences

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2009

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tom 24

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nr 3

146-157

The investigations aimed at an assessment of treatment with sewage sludges and mixtures of sewage sludge and peat effect on cadmium content in maize and soils with diversified texture. The research was conducted in conditions of pot experiment. Fertilization with sewage sludge and sludge mixtures with peat had a more beneficial effect on maize yields than treatment with mineral salts. As compared to fertilization with mineral salts, organic fertilizers applied to the soil did not increase cadmium concentrations in maize biomass. Soil pH affected cadmium mobility more than applied sewage sludge.Mixtures of sewage sludge and peat (in comparison to sewage sludge as such) slightly better influenced maize biomass yield and had a comparably cadmium content in plant biomass.

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