Methane fermentation treatment of organic waste by the mebius demonstration plant

摘要

Experiments were carried out on methane fermentation treatment of organic waste by a waste treatment and recovery system (named the Mebius system). A mixture of household garbage and night soil sludge (TS ratios: 1:1, 1:2.5, and 1.5) was treated using a demonstration plant to test the methane fermentation performance of the system. The temperature and retention time inside the reactor were maintained at 55°Cand 16 days, respectively. Three runs were carried out, each for the different TS ratio. The CODcr decomposition was between 56% and 64.8% during Runs 1 & 3, increasing along higher sludge and garbage ratios. The decomposition of CODer was 70% for the garbage, 35% for septic tank sludge, and 30% for excess activated sludge. The amount of recovered energy (estimated), resulting from treating both a sludge/garbage mixture or sludge alone, was found to be sufficient for heating the system's methane fermentation equipment.