A study on effect of municipal solid waste in different fermentation degrees on earthworm treating efficiency

Ohira 2” earthworm was used to treat municipal solid waste in different fermentation degrees. PH value and carbon nitrogen ratio (C/N) were selected as single factor level. The conversion rate of raw materials by the earthworm was studied under different pH values andC/N. The experiments results indicate that the appropriate pH value of municipal solid waste after fermentation for the earthworm living is between 6.5 and 2. And the earthworm can maintain a rather high conversion rate of raw materials when C/N is between 20 and 22. The highest conversion rate of raw materials is 0.925 g/(g·d) at C/N of 20.