Abstract：Four kinds of green wastes were co-composted with municipal solid waste (MSW) to investigate their influence on the emission of volatile sulfur compounds (VSCs), i.e., methyl mercaptan, dimethyl sulfide and dimethyl disulfide during composting. VSCs emission mainly occurred at the initial phase (the first 6days) of composting in all scenarios, with significantly different concentrations. The scenario adopting sweet potato vine mixed with MSW showed the highest accumulated emission concentrations of all the detected VSCs, while another two scenarios taking soybean straw and pterocarpus leaves as accessory composting materials had lower accumulated emission concentrations, which were about 16.0% to 74.3% of those in the former scenario, respectively. The VSCs emissions of the three scenarios were lower than those of MSW mono-composting. The level of VSCs emission increased with the organics content, while decreased with the polyphenol content. Methyl mercaptan was the major VSC to be treated in order to control the odors emission. There were more VSCs emission under conditions with low oxygen content, and tropic green wastes enriched in polyphenol had an inhibitory effect to the VSCs emission during composting.
