title: Emission of volatile sulfur compounds during composting of municipal solid waste (MSW).
abstract: Volatile sulfur compounds (VSCs) are the main source for malodor from composting plants. In this study, the VSCs generated from composting of 15-80 mm municipal solid waste (T0), kitchen waste (T1) and kitchen waste mixed dry cornstalks (T2) were measured in 60 L reactors with forced aeration for a period of 30 days. The VSCs detected in all treatments were hydrogen sulfide (H2S), methyl mercaptan (MM), dimethyl sulfide (DMS), carbon bisulfide (CS2) and dimethyl disulfide (DMDS). Over 90% of the VSCs emissions occurred during the first 15 days, and reached their peak values at days 4-7. The emission profiles of five VSCs species were significantly correlated with internal materials temperature and outlet O2 concentration (p<0.05). Total emissions of the VSCs were 216.1, 379.3 and 126.0 mg kg(-1) (dry matter) for T0, T1 and T2, respectively. Among the five VSCs, H2S was the most abundant compound with 39.0-43.0% of total VSCs released. Composting of kitchen waste from separate collection posed a negative influence on the VSC and leachate production because of its high moisture content. An addition of dry cornstalks at a mixing ratio of 4:1 (wet weight) could significantly reduce the VSCs emissions and avoid leachate. Compared to pure kitchen waste, VSCs were reduced 66.8%.
authors: Beijing Building Materials Academy of Science Research/State Key Laboratory of Solid Waste Reuse for Building Material, Beijing 100041, China.
authors: Hongyu
authors: H
authors: Zhang
authors: Frank
authors: F
authors: Schuchardt
authors: Guoxue
authors: G
authors: Li
authors: Jinbing
authors: J
authors: Yang
authors: Qingyuan
authors: Q
authors: Yang
mesh_terms: D018533:Biomass; D005735:Garbage; D010100:Oxygen / Q000032:analysis; D012037:Refuse Disposal; D012987:Soil / Q000737:chemistry*; D013457:Sulfur Compounds / Q000032:analysis*; D013696:Temperature; D055549:Volatile Organic Compounds / Q000032:analysis*; D003313:Zea mays
chemical_list: D012987:Soil; D013457:Sulfur Compounds; D055549:Volatile Organic Compounds; D010100:Oxygen