Possibilities of Sewage Sludge Application in the Conditions of Slovak Republic

Authors: Peter Takáč, Dana Šimová, Terézia Szabová, Tomáš Bakalár

Abstract:

The direct sewage sludge application is a relative cheap method for their liquidation. In the past heavy metal contents increase in soils treated with sewage sludge was observed. In 2003 there was acceptance on act n.188/2003 about sewage sludge application on soils. The basic philosophy of act is a safety of the environmental proof of sludge application on soils. The samples of soils from wastewater treatment plant (WTP) Poprad (35) and WTP Michalovce (33 samples) were analyzed which were chosen for sludge application on soils. According to the results only 14 areas for Poprad and 25 areas for Michalovce are suitable for sludge application according to act No. 188/2003. The application dose of sludge was calculated 50 t.ha-1 or 75 t. ha-1 once in 5 years to ensure that heavy metal contents in treated soils will be kept.

Keywords: Environmental safety, heavy metals in soils, sewagesludge application.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1079344

References:

[1] Domažlick├í, E. 1989. I t─øžké kovy ohrozuj├¡ ─ìlov─øka, Z├íhradn├¡ctv├¡ , 1989 No.6, pp. 12 - 14
[2] Hartig, K. - Krempa, P. 2001. Koncepce likvidace a využit├¡ kalu z ─ìist├¡ren odpadn├¡ch vod, Proceedings ÔÇ× KALY A ODPADY 2001" , Tatranské Zruby, 26.4 - 27.4. 2001, pp. 32- 39
[3] HolobradÛ, K. - Ilka, P.1997. Metodika priamej aplikácie stabilizovanÛch čistiarenskÛch kalov a dnovÛch sedimentov na pôdu, VÚPU, Bratislava, 1997, pp.48
[4] Mitchell, CH.1992. Using sewage sludge as fertilizer, Environmental education series agriculture and natural resources ANR - 172, 1992
[5] Morera, M.T. - Echeveria, J. - Garrido, J.2002. Bioavailability of heavy metals in soils amended with sewage sludge, Canadian Journal of Soil Science, 82, No.4, 2002, pp.433 - 438
[6] Szabov├í, T. - Gondov├í, A. - Le┼í─ìinsk├í. M.1998. Kumul├ícia ┼Ñažk├¢ch kovov v p├┤dach po aplik├ícii ─ìistiarensk├¢ch kalov, Acta Montanistica Slovaca. No. 4, 1998, pp. 473 - 481
[7] ┼áumn├í, J. - Koz├íkov├í, K.2004. Pr├ívne a koncep─ìné v├¢chodisk├í nakladania s kalmi z komun├ílnych ─îOV a ich produkcia v SR, Proceedings ÔÇ× KALY A ODPADY 2004" Bratislava 25.3. - 26.3. 2004, pp. 12 - 15
[8] Act of Slovak Republic No. 188/2003 of Apr. 23, 2003 about sewage sludge application to the soils.