Assessment of Ecotoxicity of Incinerated Sewage Sludge Ash (ISSA)

Combustion in fluidised bed boilers is one of the most commonly used methods treatment municipal sewage sludge. Fly ash (FA) and air pollution control (APC) residues are solid by-products generated by flue gas treatment. There significant differences chemical composition these wastes. FA composed mainly SiO2, P2O5, CaO metals such as Zn, Ti, Cu, Cr, Pb Ni. APC contain SO3 Na2O. The leachability tests that were carried out indicate wastes display very low heavy (for example was equal 0.0004 mg·dm?3 both wastes, Cd 0.0012 an 0.00004 APC). On other hand, high sulphate concentrations (49,375 mg·dm?3) found water extract for residues. In order to determine toxicity plants, pot experiments with different additions waste soil (on Lepidium sativum Sinapis alba). Tests based on seeds germinations sativum) extracts from (in concentrations) also performed. results obtained Complete inhibition germination growth test plants all tested experiments. Seed did not show any this waste. Pot showed their only a (30%) addition soil.