Author : Aarthy R, Sasi Regha M , Ashokkumar D, Karthik Shanmugam , Sathanandham Thangaraj , Sathes kumar K ,
European Journal of Molecular & Clinical Medicine,
2020, Volume 7, Issue 11, Pages 123-130
Agriculture is the important process of cultivating food and some other materials. The necessity of the agriculture is more. In Tamil Nadu, large amount of agricultural lands are available. Especially in hilly region some kind of special vegetables are cultivated. It includes carrot, beet root, potato, raddish, etc,. Some of those vegetables are washed with water before it comes to the market for sale. The surrounding of Ooty contains nearly 240 washing plants. Each plants are using more than 5000 litres of water in a single day to wash carrots. This waste water is directly mixed with water bodies like river. It may cause water pollution, soil erosion, growth of micro-organisms like bacteriae. So it needs to be recycled and reused for the same or various purpose. As the advanced technologies for the recycling or treatment process are economical, an alternate change is needed. The raw sample of carrot cleaning water is collected from Ketti Palada of Nilgiri District. This water is first coagulated with some natural coagulants such as Lime Powder, Aluminium Sulphate, Ferric chloride, Industrial Grade Alum, Powdered Stone Alum (Potash Alum) and the turbidity content is tested. As the turbidity decrement is better when coagulate with the powdered stone alum (potash alum), it is chosen to use in the natural filter media set up. This natural filter media set up contains a PVC pipe having 135mm diameter and 700mm height, cotton layers, aggregate (10mm and 20mm in size) layers, river sand, filter paper and potash alum. The basic tests for both raw and treated water have done and the results are compared. These tests include pH, Turbidity, Calcium hardness, Total hardness, Total dissolved solids (TDS), Total Suspended Solids (TSS), Sulphate, Nitrate, Phosphate, Chloride and coagulation tests. Another overhead tank contains normal tap water for backwash purpose. This treatment process is effective and low cost.