Comparison of different municipal sewage sludge products for potential ecotoxicity

in them. However, as they have impurities in their composition, they should be pre-tested toxicologically. The aim of this study was the ecotoxicological evaluation of experimental fertilizer products and a reclamation blend. These products were studied for the first time, so there is lack of international literature on the subject. The effect of applied fertilizer products on the improvement of soil fertilizing properties was assessed based on national standards using higher plants indicated as target bioindicators in European guidelines (OECD/ OCDE 208). The bioassays planned for this study include phytotoxicity tests to assess soil quality following the application of fertilizers made from sewage sludge, based on modified procedures described in PN-EN ISO 11269-2:2013 and PN-EN ISO 11269-1:2013-06, used to assess the potentially toxic effects of chemical compounds on root growth, and emergence, early growth and development stages of various land plants. White mustard ( Sinapis alba L.) was used in the ecotoxicological assessment – a plant with a wide range of applications in the feed, chemical, cosmetic,