The SULPHUS can replace chemical scrubbers and be a safer, much more economical technique for
odour control. In the past decades controlling H2S was usually achieved in wet or chemical scrubbers in which H2S is either absorbed in a caustic solution or absorbed and oxidized in a caustic-hypochlorite or caustic-peroxide solution.
Indisputably chemical scrubbing in packed-bed towers is an established technique to reduce odours. However, chemical scrubbing suffers from important drawbacks such as high operating costs, generation of halomethanes that are known air toxics and the requirement for hazardous chemicals which pose serious health and safety concerns.
The conversion of chemical scrubber consists of replacing the existing packing with OdourPacks, replacing the liquid recycle pump with a smaller one, disconnecting the chemical feeds and, finally, modifying the controls of the reactor.
The costs of conversion and cost savings on each application depends size, concentration of H2S, chemical feed, etc.. Still it is very valuable in most cases to convert chemical scrubbers into the SULPHUS.