Investigating heat stress in gari frying

Abstract

One of the greatest discomforts widely reported in gari frying is heat stress experienced by the processors.  The effects of this risk, among other inherent risks, on the workers call for detailed investigation into the cause and effects with a view to mitigating them.  When excessive, this can cause heat stroke, a condition that can either threaten our lives or cause dire consequences.  This study was carried out in 40 gari-frying workstations in Ifo Local Government area of Ogun State and its environs.  Data were collected with questionnaire and oral interview, together with the use of a heat stress assessment checklist.  Further qualitative analysis was done using Wet Bulb Globe Temperature (WBGT).  Statistical analysis was performed using Analysis of Variance (ANOVA) to test hypothesis on the WBGT.  The mean value of WBGT index recorded was 35^oC, which is above the permissible WBGT of 31^oC, indicating the prevalence of heat stress.  The use of other low level but more effective source of heat has been recommended, such that workers would have less contact with heat during the frying task. 

Keywords: heat stress, gari frying, wet bulb globe temperature index, check list, ergonomics