However, better results of this study than previous report could be attributed to substrate quality, design and biological components (earthworm species, plant type etc.)Moreover, activities of earthworm and associated microflora in vermibeds also promote rapid P-mineralization in the system. The level of PO43− in treated effluent from biofiltration and vermibiofiltration is of prime concern because high concentration of such substance is responsible for eutrophication in surface freshwater resources Although, the level of PO43− in final effluent from biofiltration system was comparatively high than prescribed limit, i.e. 5.0 mg/L as decided by national pollution monitoring agency, i.e. Central Pollution Control Board (CPCB) for surface discharges of treated water.