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Influence of agricultural utilization of sludge and compost from rural wastewater treatment plant on nitrogen passes in light soil

100%
Czyżyk F., Rajmund A.
Polish Journal of Chemical Technology
|
2014
|
vol. 16
|
issue 1
1-6
EN
This paper presents the results of studies which aim was to determine the pollution of the water environment for both methods of preparation for the utilization of sewage sludge in agriculture. The study was conducted in 2008-2012 in lysimeters filled with light sandy soil (clayey sand). During the study variants with equal doses of nitrogen in an amount of 20 g . m-2 (15.7 g per one lysimeter) were supplied to the soil in sewage sludge and in the compost made from the same sludge. These variants were used three times for two species of perennial plants: Miscanthus gigantenus i Sida hermaphrodita Rusby. In a variant of sludge soil fertilizing, it was leached into water environment more than 12% of the applied nitrogen over 5 years of research. In case of compost nitrogen leaching was reduced to 8.1-10.0% of the quantity supplied to the soil.
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Indicators of water consumption and the quantity of wastewater formed in selected branches of food industry

81%
Strzelczyk M., Steinhoff-Wrześniewska A., Rajmund A.
Polish Journal of Chemical Technology
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2010
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vol. 12
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issue 4
6-10
EN
The studies covered the branches: sugar industry, fruit-and-vegetable processing and potato processing plants. The analyses of water consumption and quantities of wastewater formed in 24 production plants were performed in the paper. A comparison of water and wastewater management in three branches showed that the highest water consumption is in fruit-and-vegetable processing. The data collected in the paper indicates the drop of water consumption in potato as well as fruit-and-vegetable industry. The values obtained for sugar industry indicate that it is the least diversified branch.
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