MBT 시스템에 있어서 인위적인 가온이 호기성안정화에 미치는 영향 검토

This study has analyzed and checked the external heating in MBT system on the aerobic stabilization reaction. The 60% of food waste, 25% of paper waste, 2% of wood waste and 5% of compost and 8% of water addition were set as the biodegradable wastes in the aerobic stabilization reactor and the experiment was performed with temperature increasing in no heating (Room Temperature 20oC), 30oC, 40oC, 50oC and 60oC on each reactor.
The reactor controlled in over 50oC did not show the change in temperature because it was over the limit of control temperature and the quantity of CO2 was observed lower than reactor controlled under 40oC. The change in weight for charged material at the dry condition showed the reduction of 14.5, 3% at the heat addition over 50oC which was very low comparing to the 31.9, 34.7, 39.5% in case of heat addition under 40oC. It showed the smallest reduction rate in weight of real charged material as the reduction rate of 3%. Water soluble CODcr and TOC showed the same pattern and the control under 40oC showed more than 8 and more or less of 6 in pH at 50oC. Such result concluded that the artificial heating over 50oC disturbs the stabilization reaction by reducing the activation of microorganism and the heating under 40oC or no heating was identified as minimizing the influence when the control was required.