Original Articles
Pankaj Kumar Roy1*, Malabika B
Abstract
A study has been carried out to assess the performance of existing sewage fed fishery under ecologically balanced waste water treatment system. The study also assessed the eco-toxicity of the ecologically balanced waste water system and detail auditing of heavy metals in the fish, sediments and waste water was also carried out. The sewage analysis result of DWF from Topsia point A to Ghushighata reveals that the BOD value of sewage is getting reduced while moving along more than 30 km stretch and also due to utilization of sewage in fish ponds including ecologically balanced treatment in the pond and then getting mixed again in the DWF. The study also indicates that presence of heavy metals in fish is within tolerable limit according to per capita per day consumption basis. In this context, it is to be mentioned that considerable quantum of metal are released out from fish during cutting, dressing and washing.