| Abstract |
Reuse of appropriately treated greywater can be extensive solution to aid the overburdened water resources. The present work investigates the treatment of domestic greywater using HC, Fenton and hybrid HC + Fenton techniques. Operating parameters such as treatment time, inlet pressure, initial pH, Fe2+/H2O2 ratio etc. were optimized for individual HC and Fenton processes. Hybrid greywater treatment using HC + Fenton was performed at optimum operating conditions of pH: 4, Inlet Pressure: 4 bar, Fe2+/H2O2 Ratio- 1:10, treatment time: 1 h. Degradation efficiency of all the techniques was analyzed as COD removal. HC, Fenton and hybrid HC + Fenton techniques showed COD degradation of 53.5 %, 59.1 % and 92.8 % respectively in 60 min. Rate constants for HC, Fenton and hybrid HC + Fenton were 11.2 x 10-3, 12.7 x 10-3, 36.5 x 10-3 min-1 respectively. The hybrid approach used to clean greywater showed very little evidence of bacterial colony formation. Hybrid greywater treatment meets the need for reusing water for irrigation and domestic purpose. With a synergy rating of 1.5, hybrid technique is more effective than individual procedures. It was determined that the hybrid approach would cost 248.02 $/m3 to treat the greywater that has undergone hybrid treatment meets criteria for reuse and can be used in non-potable tasks. Hence, this work shows that hybrid HC + Fenton technique can be used for effective treatment to treat greywater. |
