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Assessment of possibility of agricultural use of municipal sewage sludge generated in selected small sewage treatment plants from Kraków district

Wieczorek J., Frączek K.

Journal of Ecological Engineering

2013

Vol. 14, nr 2

36--42

The paper presents the findings from research on physical chemical parameters as well as on microbiological-parasitological municipal sewage sludge from one mediumsized and three small municipal sewage treatment plants from the area of Kraków district. The research was conducted in the years 2007-2012 and aimed at estimating the possibility of agricultural use of the studied sludge. The analyzed sludge turned out to be rich in fertilizing elements, i.e. organic substance, nitrogen, phosphorus, calcium and magnesium. Contents of heavy metals in the analyzed sludge were distinctly lower than the permissible contents in sludge used in agriculture. However, due to frequent occurrence of bacteria from Salmonella group in the studied sludge, its agricultural use may be limited. Relatively high variability in the determined parameters makes it necessary to monitor continuously the sludge coming from particular lots and sewage treatment plants.

Wykorzystanie bayesowskiego modelu do oceny zmian wzrostu fasoli (Phasoleum vulgaris)

Szwedziak K

Inżynieria Rolnicza

2005

R. 9, nr 14

347--351

W niniejszej pracy dokonano próby wykorzystania jednej z metod statystycznych do oceny przyrostu biomasy fasoli po zastosowaniu nawożenia osadem czynnym. W pracy zastosowano bayesowskie modelowanie statystyczne, przyjęto założenie log-liniowego przyrostu łodyg fasoli na długość

An activated sludge that is originating from the sewage plant can be used as a fertil-izer for cultivation after a previous homogenization. The natural use of the activated sludge resolves the problems of the NPK high costs fertilization as well as the sludge excess disposal.