Biodegradation of Sewage Waste Water Using Azolla Microphylla and Its Reuse for Aquaculture of Fish Tilapia Mossambica

Abstract

This study focused on the biomonitoring capacity of Azolla microphylla for purification of sewage waste water. 100% untreated and treated sewage samples were prepared and the Azolla microphylla were introduced into the tubs. After 96hrs, sewage waste water samples were analysed and the results showed an active reduction in physicochemical parameters and heavy metals. The biotreated (Azolla microphylla) sample was reused for Aquaculture of fish - Tilapia mossambica for a period of 60 days. At the end of 60 days, this study was extended to show the effects of 100% untreated, treated, biountreated (Azolla microphylla) and biotreated (Azolla microphylla) sewage water on fish - Tilapia mossambica by examining the potential target organs namely gills, liver and muscles for biochemical estimation - Protein, Carbohydrate and Lipid. The results revealed a decreasing trend of biochemical constituents in different organs of T.mossambica exposed to 100% untreated and treated compared to control but an increasing trend was recorded in 100% biotreated and biountreated samples compared to other samples. Keywords: Sewage waste water treatment, Physico chemical parameters, Azolla microphylla, Tilapia mossambica, Biochemical parameters