Item

SS

Reduction

(%)

VSS

Reduction

(%)

Growth rate of earthworm weight (%)

Increase rate of earthworm density (%)

Increase rate of earthworm biomass (%)

Filter’s maximum sludge capability (g/L)

Filter height

0.127

0.178

0.852

0.765

0.975**

0.921*

Filling diameter

−0.464

−0.513

0.746

−0.538

0.835

0.986**

Influent concentration

−0.508

−0.550

−0.655

−0.546

−0.807

−0.957*