Sulphide Removal from Sewage Wastewater by Oxidation Technique

Abstract

In this study sewage wastewater samples were collected from different areas of Lahore, Pakistan
from the WASA sewer system and then different chemical oxidizers: O2, KMNO4, H2O2 were used to
remove the sulphides from these samples for selection of suitable oxidizer for treatment. From these results,
it was observed that H2O2 was found effective and suitable for treatment and it can be used for this purpose.
Theoretical and experimental doses required for treatment were similar. The KMNO4 oxidation reactions
were completed in five minutes time while H2O2 required more time and removed sulphide completely
with slow chemical reaction. Different doses of oxidizer such as 1 to 6 g of oxygen, 1 to 14 g of KMNO4,1
to 11 g of H2O2 with different ratios were used and H2O2 was found suitable. Using 11 g of H2O2 dose,
100 % sulphides were removed, H2O2 as an oxidizer was found more suitable for sulphide removal from
wastewater.