APPLICATION OF NEW PYROLYSIS INDEXES TO T HE STUDY OF THE EVOLUTION OF ORGANIC-MATTER IN SOILS AMMENDED WITH SEWAGE-SLUDGE

It has been made an study of the evolution of organic matter in soils treated with sewage sludge by means of considering pyrolysis together with high resolution gas chromatography, using three differente types of detection: flame ionization detector (F.I.D.), selective nitrogen-p hosphorous detector (N.P.D.) and mass spectrometer (M.S.). It is aimed to evaluate several pyrolysis indexes, either from the literature or proposed for the first time in this work. The results obtained let us conclude that the evolution of treated soils follows the trend establi shed by nontreated soils and that there are no inhibition phenomena du e to this addition.