Comparative Study on the Treatment of Lake Water using Natural and Chemical Coagulants

Many medical, industrial and allelopathic uses of common weeds have been reported. Nearly three herbs namely Moringa Oleifera, Cicer Arientinum, Dolichos lablab were chosen for this study. The efficiency of the extracts of Moringa Oleifera, Cicer Arientinum, Dolichos lablab made them for used as a natural coagulants for the clarification of water turbidity (NTU). Alum is the widely used chemical coagulant but is a strong neurotoxin which is the main cause of Alzheimer's disease. In the present study experiments were conducted in the lab to investigate the efficiency of stock solutions obtained from the seeds of above plants as for the treatment of turbid water samples (PARANUR LAKE). Jar test experiments were carried out for high, as well as low levels of turbidity with the coagulant dosages of 200mg/l, 400mg/l, 600mg/l, 800mg/l and 1000mg/l for Moringa Oleifera, Cicer Arientinum, Dolichos lablab.