Abstract
The present study investigated the role of earthworms in pollutant removal and toxicity assay of domestic wastewater. An indigenous reactor (vermigratings as an active layer) was set up for 60 days with a hydraulic loading rate of 1 m3 / m2 -d and hydraulic retention time of 3.5 h to evaluate its performance. Removal of total suspended solids, total dissolved solids, biochemical oxygen demand, chemical oxygen demand, and sulfate was found to be 92 %, 93 %, 89 %, 86 %, and 63.43 %, respectively. The Phyto-toxicity test reveals a higher germination rate and plant growth with vermifilter effluent than with geofilter effluent and raw wastewater. Additionally, vermifilter achieved heterotrophic bacteria removal by 1.54-fold. Hence, treated effluent can be used for irrigation purposes. Overall, this study will establish a potential alternative to the conventional wastewater treatment system and achieve Sustainable Development Goals 6.
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