Sewage Waste Water Treatment by the Hydrodynamic Cavitation Method
Authors:-Chanchal Valvi, Dr. Pankaj P. Gohil, Dr. Hemangi Desai
Abstract-The sewage water sample obtained after secondary treatment, was given treatment with Hydrodynamic Cavitation Method. Physico chemical parameters were determined using standard methods of APHA, before and after treatment at 24 hour in cavitation device. the water quality obtained is comparable to Drinking Water Standards (IS). The water quality parameters selected were: pH, Electrical Conductivity, Turbidity, TS,TSS, TDS, DO, Cl- ,Alkalinity (as CaCO3), Cu2+ ,Zn2+ ,Mg2+ Hardness, Total Hardness (as CaCO3), Phosphate and BOD. The highest reduction obtained was 88.88% for Cl- . Except TS, TSS and Cu2+ all the parameters were get back in the range of drinking water quality standards. The mechanism supports the reduction in parameter may be due to the collapse of cavities induces effects such as high shear forces, extreme temperatures, shock waves, turbulence, and extreme pressure in the fluid, formation of OHo free radicals provide to reduce pollution. The Cavitation method is proven to be the most effective over the other methods. Because, it does not require any chemical reagent, hence do not produce any hazardous chemical waste and maintain eco-friendly and economically sustainable environment benign technique for the treatment of wastewater.
