Sewage Sludge as Inhibitor of the Formation of Persistent Organic Pollutants during Incineration

With the objective of suppressing dioxins and furans (PCDD/Fs) emission in municipal solid waste incineration plants (MSWI), different chemical inhibitors have been tested. Among these inhibitors, nitrogen sulphur compounds can significantly suppress PCDD/Fs formation via de novo synthesis, which gives very interesting results with little capital investment. In recent years, possibility using rich and/or as a source inhibitor has considered, thus reduced emissions pollutants while is treated. The effect adding sludge from urban sewage treatment three variants specially studied: directly mixing waste, decomposition gas previously dried sludge, together other such thiourea. Reduction laboratory tests model samples indicated efficiency to be higher than 99%, (SS) an whereas, actual MSWI plants, high 90%.