Odorants and malodors associated with land application of biosolids stabilized with lime and coal fly ash.

摘要: Malodor emissions limit public acceptance of using municipal biosolids as natural organic resources in agricultural production. We aimed to identify major odorants and evaluate odor concentrations associated with land application anaerobically digested sewage sludges (Class B) their alkaline (lime coal fly ash)-stabilized products A). These two types were applied at 12.6 tonnes ha(-1) (dry weight) microplots very fine clayey Vertisol the Jezreel Valley, northern Israel. The volatile compounds (VOCs) emitted from before during stabilization after incorporation into soil analyzed by headspace solid-phase microextraction followed gas chromatography-mass spectrometry. Odor plots evaluated on site a Nasal Ranger field olfactometer that sniffed over defined surface area through static chamber. odors three activated sludge water treatment plants had one characteristic chemical fingerprint. Alkaline substantial high ammonia release nitrogen-containing VOCs did not effectively reduce potential annoyance. Odorous could be generated within incorporation, presumably because anaerobic conditions soil-biosolids aggregates. propose dimethyl disulfide trisulfide, which seem most related biosolids-treated soil, used markers for annoyance sludges.