45 peaks and compounds in the total chromatogram of the sample pyrolyzed at 300 u00b0 f see fig1 these compounds consisted of a series of low molecular weight acids beginning with acetic acids a series of fatty acids a series of fatty acid esters indoles skatole various ketones aldehydes and sulfur compounds including methanethiol and sulfur dioxide the compounds responsible for the odor in the waste include organic acids and esters acetic through hexanoic aldehydes ketones indoles skatole phenols ammonia and organic sulfur and nitrogen compounds the sample that had been pyrolyzed at 300 u00b0 f was then pyrolyzed at 600 u00b0 f for further analysis the total chromatogram showed fewer compounds for this second heating stage the low molecular weight fatty acids were gone as were other low molecular weight compounds the higher molecular weight compounds e g the fatty acids and esters were more pronounced the pyrolysis of the same sample at 900 u00b0 f showed only a very few peaks only fatty acid esters remained with most of the odor producing compounds being eliminated this sample which was located in a quartz tube was visually inspected after the three heatings a charred residue remained in the tube the.