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Fly ash based low cost method for COD removal from domestic waste water

Rani Sahu
[email protected]

Vijender Sahu*, R. P. Dahiya, K. Gadgil
Center for Energy Studies Indian Institute of Technology, New Delhi

*District Science specialist Hisar (Haryana)

Abstract
Domestic wastewater is analysed for determining its major pollutants. Combating potential of fly ash and a commercial grade activated carbon is determined to remove COD from the wastewater. For this purpose a system of standardised batch absorbers under steady state conditions is used to study the effect of these media. The influence of treatment time, adsorbent dose, pH of the media, initial COD concentration, agitation speed and adsorbent particle size on the rate of per cent COD reduction is evaluated. Fly ash has shown quite effective adsorbent capacity for COD reduction from the domestic wastewater. Though its capacity is lower than that of commercial grade activated carbon, the low material cost makes it an attractive option for the treatment of domestic wastewater.