Aerobic Treatment of Waste Water by Using Garlic As Natural Coagulant and PVC and Coconut Shell as Medium

Abstract

Water, the elixir of life, is a prime natural resource which covers 70% of the Earth’s surface.  Water pollution affects marine ecosystems, wildlife health, and human well-being. Sewage, fertilizer, and agricultural run-off contain organic materials that when discharged into waters, increase the growth of algae, which causes the depletion of oxygen.  The low oxygen levels are not able to support most indigenous organisms in the area and therefore upset the natural ecological balance in rivers and lakes. This project deals with treatment of wastewater by using garlic powder as natural coagulant for coagulation and aeration by using Pvc rings and coconut shell as two different media. The sample is a high chemical leather tannery effluent collected from a leather tannery, Vellore, Tamil Nadu. Before carrying out the treatment the important parameters like pH, dissolved oxygen, turbidity, and chloride are tested. Finally the treated wastewater is once again checked for changes in parameters and compared to meet the norms of Central Pollution Control Board (CPCB).