kitchen garbage Biogasification

Under the Yokohama 3R Dream Plan, we are working to reduce the amount of kitchen garbage, but the remaining kitchen garbage still contains more than 30% of burnable garbage, and we are considering ways to recycle resources.

Based on the assumption that a biogasification facility will be added to the incinerator plant, we estimated the effects of energy creation and costs, etc., and compared with the installation of only incineration plants.
From the collected burnable garbage, kitchen garbage (including paper) is sorted by machine and then gasified through various processes. The generated gas is extracted from energy sources by power generation.
On the other hand, most of the burnable garbage, which were not sorted by machine, are incinerated at factories, where energy is extracted as electricity.

If a biogasification facility is installed and the gas is generated by a fuel cell with the highest energy-generating effect, it is expected that the amount of energy generated will be approximately 1,600 kWh/day compared to when no biogasification facility is installed.
This is equivalent to the amount of electricity used by about 130 households.
On the other hand, the total project cost will be approximately 10.5 billion yen over 20 years (approximately 500 million yen per year) compared to the case where a biogasification facility is not installed.
As described above, with the current biogasification technology, it is difficult to introduce a biogasification facility at present because of its cost consequences due to an increase in total project cost compared to the energy creation effect.

Promote initiatives such as the results of other cities where the facilities are operating, surveys on biogasification technologies of manufacturers, and collecting information on national subsidy systems, etc., and feasibility over a long period of time, such as when updating incineration plants in the future. I will explore.