ODOUR CONTROL TRADITIONAL APPROACHES


The starting point for technology selection should always be to analyze and measure the contents of the gas stream to be treated. A number of traditional options exist for control:

Incineration
Generally expensive in both capital and, more importantly, operating costs for odour streams, since the low combustibles content makes a negligible contribution to energy requirements. Thermal catalysts are prone to poisoning, especially by certain sulphur containing compounds.

Adsorption
Effective means of combating low volume and/or concentrated odour streams, but replacement costs become prohibitive as volume and concentrations rise.

Bio-systems
Considered a 'green' option and cope well with steady, consistent odour loading, but sensitive to all environmental change, especially peaks of odour, and thus require skilled (and therefore expensive) attention. Bio-filters usually require considerable space.

Ozone, counteractants and masking agents
Effective with odour abatement close to the source, but are unlikely to destroy the odour and, as they disperse, can transfer rather than solve the problem.

Chemical scrubbing using sodium hypochlorite
Although reasonably successful, is generally multi-stage to avoid the production of chlorine and/or chlorinated by-products leading to high capital cost, space required and chemical consumption.

Literature
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