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Impact of wastewater treated in Saczyn wastewater treatment plant upon quality of the water of the Pokrzywnica River - right tributary of the Prosna River

100%

Malecki Z.

Polish Journal of Natural Sciences

2009

tom 24

nr 4

207-223

The purpose of this study was to identify the impact of wastewater treated in the mechanical & biological wastewater treatment plant in Saczyn upon quality of the water in the Pokrzywnica and recommend actions to be taken to improve cleanness of the surface waters. The analysis embraced identification of characteristics of the Pokrzywnica basin and an analysis of concentrations of selected physical & chemical components of its water and of wastewater treated in Saczyn in 2006–2007. The study also includes a description of treatment technologies applied in the said treatment plant along with photo records. The analysis of selected results of physical & chemical composition tests of the water in the Pokrzywnica was performed in reference to the measurement cross-section of the Porwita 8.0 km based on the criteria contained in the decree by the Minister of Environment (Rozporządzenie Ministra Środowiska z dnia 11 lutego 2004... Dz.U. z 2004 r., nr 32, poz. 284) on classification of surface and underground waters (due to absence of a new one, the analysis and evaluation of the water quality was carried out in accordance with the “cancelled” decree). An analysis of quality of the treated wastewater was performed according to the standards contemporaneously in effect: BZT5 – Jakość wody... PN-EN 1899-1:2002; ChZT-Cr – Oznaczanie... PN-74/C-04578:03, suspension – PB/ZAW-1/05 rev. 1 from 01.10.2005. In 2006–2007 significant exceedance was recorded in relation to the parameters specified in the water permit for the concentration of chemical components and oxygen index in treated wastewater (in 2006 the following parameters were exceeded – BZT5 by 25%, ChZT-Cr by 70.2%, general suspension by 66.0%, general nitrogen by 75.0%, general phosphorous by 118.0%). The water in the Pokrzywnica during the analysis period (2006–2007) belonged to quality class IV, i.e. water contaminated beyond standard (BZT5 2.93 and 2.40 mgO₂ dm⁺³, dissolved oxygen 8.18 and 8.28 mgO₂ dm⁺³, ChZT-Cr 27.3 mgO₂ dm⁺³ (2006), Kjeldahl nitrogen 1.265 and 1.07 mgN dm⁺³, general nitrogen 5.65 and 6.16 mgN dm⁺³, general phosphorous 0.201 and 0.89 mgP dm⁺³). It was found out that the wastewater treated in Saczyn exerted significant impact upon the quality of water in the Pokrzywnica. Modernization of the wastewater treatment plant in Saczyn should be continued taking advantage of the phosphorous precipitation process. Furthermore, the water and wastewater management should be improved accompanied by extension of biological filters along the Pokrzywnica.

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Spatio-temporal soil quality assessment under crop rotation irrigated with treated urban wastewater using fuzzy modelling

100%

Ghaemi M., Astaraei A. R., Mahalati M. N., Emami H., Sanaeinejad H. H.

International Agrophysics

2014

tom 28

nr 3

Quantifying soil quality is important for asses- sing soil management practices effects on spatial and temporal variability of soil quality at the field scale. We studied the pos- sibility of defining a simple and practical fuzzy soil quality index based on biological, chemical and physical indicators for assessing quality variations of soil irrigated with well water and treated urban wastewater during two experimental years. In this study 6 proper- ties considered as minimum data set were selected out of 18 soil properties as total data set using the principal component analysis. Treated urban wastewater use had greater impact on biological and chemical quality. The results showed that the studied minimum data set could be a suitable representative of total data set. Significant correlation between the fuzzy soil quality index and crop yield (R 2 = 0.72) indicated the index had high biological significance for studied area. Fuzzy soil quality index approach (R 2 = 0.99) could be effectively utilized as a tool leading to better understanding soil quality changes. This is a first trial of creation of a universal index of soil quality undertaken.

Ograniczanie wyników

1 International Agrophysics

1 Polish Journal of Natural Sciences

1 Astaraei A. R.

1 Emami H.

1 Ghaemi M.

1 Mahalati M. N.

1 Malecki Z.

1 Sanaeinejad H. H.

1 2014

1 2009

Wyniki wyszukiwania

Impact of wastewater treated in Saczyn wastewater treatment plant upon quality of the water of the Pokrzywnica River - right tributary of the Prosna River

Spatio-temporal soil quality assessment under crop rotation irrigated with treated urban wastewater using fuzzy modelling