Modeling of CO Accumulation in the Headspace of the Bioreactor during Organic Waste Composting

Advanced technologies call for composting indoors minimized impact on the surrounding environment. However, enclosing compost piles inside halls may cause accumulation of toxic pollutants, including carbon monoxide (CO). Thus, there is a need to assess occupational risk workers that can be exposed CO concentrations > 300 ppm at initial stage process. The objectives were (1) develop model in headspace bioreactor during organic waste and (2) ventilation enclosed compost. maximum allowable level potential short-term exposure up 10 min was 100 ppm. modeled horizontal static reactor over 14 days seven scenarios, differing ratio headspace-to-waste volumes (H:W) (4:1, 3:1, 2:1, 1:1, 1:2, 1:3, 1:4). Headspace concentration exceeded each variant with value 36.1% without 3.2% daily release accumulated CO. airflow necessary maintain < ppmv should least 7.15 m3·(h·Mg w.m.)−1. H:W 4:1 height pile 1 m less susceptible accumulation.