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Huang W.-X.,University of Science and Technology Beijing | Huang W.-X.,China urban construction and Research Institute | Su H.-Y.,China urban construction and Research Institute | Huang D.-D.,China urban construction and Research Institute | And 3 more authors.
Zhongguo Huanjing Kexue/China Environmental Science | Year: 2012

Aeration methodologies for bio-drying of high-water-content municipal solid waste (MSW) was tested. Four respective trials were conducted with different aeration methodologies (intermittent aeration 10min/20min; intermittent aeration 5min/25min, 40°C air intermittent aeration and intermittent-continuous aeration). The results showed that the last two modes lead to more effective water content evaporation, increased dehydration ratio of per raw wet waste, water removal capacity of per organic waste decomposition and output lower heat value (LHV). However, it also resulted in shorter period of biomass high-temperature (above 60°C) stage, fewer volatile solid (VS) consumption, and lower rate of organic stabilization. After 18d bio-drying, the water content of four trials output were 39.6%, 34.4%, 23.7% and 24.5%, respectively. Water removal per initial raw waste was 0.437, 0.476, 0.523, and 0.517kg/kg, respectively. The output LHV was 11954, 12994, 15760 and 14801kJ/kg, respectively. Compared with that of the initial waste, the LHV enhanced 121%, 140%, 191% and 173%, respectively. The highest output LHV was that of 40°C air aeration mode.

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