VERMI-BIOFILTRATION FOR REMOVAL OF CHEMICAL AND BIOLOGICAL POLLUTANTS FROM MUNICIPAL WASTEWATER FOR AGRICULTURE – A REVIEWBISWAS, AMITAbstract Direct application of raw municipal wastewater in irrigation may create many undesirable harmful consequences. Therefore, the treated effluent through different technologies is generally preferred for reuse. In the present study, the performance of vermi-biofiltration (VBF) for removal of chemical and biological impurities from municipal wastewater was reviewed. The study revealed that the treated water quality varied depending on the hydraulic retention time (HRT). The removal efficiency of BOD, COD, fecal coliforms, E. coli and other biological impurities by VBF was found to be more than 90% in some cases. Simultaneously, VBF was also capable to eliminate all undesirable substances with minimum cost by preserving all essential plant nutrients. The low operational and maintenance costs may make VBF viable for developing countries. |