Changes in characteristics of composting factors according to the presence or absence of air in pig manure compost and correlation between each factor

The composting process of pig manure requires separation from the slurry and maturity under aerobic conditions. Thus, we investigated anoxic characteristics correlation between each factor. First, a decanter solid-liquid separator was used, separated transported to laboratory in an impervious bag. We mixed sawdust (bulking agent) 6:4(V/V) ratio adjust moisture content 70%. About 140 liters materials were treated cylindrical reactors with bottom diffuser. Three installed inside reduce ambient temperature, where room temperature 25°C continuously. Supplied air volume reactor 100LPM/ 1 m3 compost. test had connected supply system, but control none. pH EC raw 8.42 2,341㎲/㎝, 5.01 149㎲/㎝, respectively. Mixed material showed 8.48 2,060 s/cm, After two days composting, compost pile increased 9.08, 9.13, 8.57, respectively, stable for 20 days. change NH4-N similar tendency 0.84 coefficient, Salt, 0.98. VS/TS 0.83. However, negative -0.64 ripeness, -0.57 T-N, -0.79 T-P.