Total reduced sulphur as a potential indicator of slaughterhouse hygiene

Measurements of total reduced sulphur (TRS) compounds, emitted from faeces, may be an indicator of hygiene in slaughterhouses. The aim of this study was to measure the concentrations of TRS compounds in the air at various locations and times in pig and cattle slaughterhouses. The data was then reviewed to see if there was any pattern associated with location in the slaughterhouses or any changes associated with activities or events. TRS concentration was lowest in chillers that are away from the slaughter area. Gut bursts generally led to increases in TRS but the level of increase was variable. In one slaughterhouse, ventilation fans were used during part of the day and this corresponded with falls in the TRS concentration. These variations in TRS concentration negate its use as a reliable indicator of slaughterhouse hygiene.