Effects Of Biocides On The Microbial Contents Of A Locally Made Fluid (Hydraulic Fluid).

ABSTRACT

The aim of this study is to ascertain the biocide effect and microbial population in formulated fluid. A total of four (4) biocides namely: sodium hexametaphosphate, hydrogen peroxide, ciprofloxacin and fluconazole were treated on microorganisms isolated from the formulated fluid. A total of three (3) bacteria spp and two (2) fungal specie were isolated belonging to the genera of Escherichia coli, Salmonella specie, Staphylococcus aureus, Aspergillus flavus and Aspergillus niger respectively. From this study, the biocidal effect of sodium hexametaphosphate on Escherichia coli ranged from 0.2x 105 cfu/g to 0.47x105cfu/g followed by salmonella sp which ranged from 0.19x 105 cfu/g to 0.46x105cfu/g. The biocidal effect of Hydrogen peroxide on Escherichia coli ranged from 0.32x105cfu/g to 0.37x105cfu/g followed by Salmonella sp which ranged from 0.22x105cfu/g to 0.35x105cfu/g. The biocidal effect of sodium hexametaphosphate on A. niger ranged from 0.32x105cfu/g to 0.33x105cfu/g and A. flavus ranged from 0.25x105cfu/g to 1.07x105cfu/g’ While the biocidal effect of hydrogen peroxide on A. niger ranged from 0.04x105cfu/g to 0.08x105cfu/g and A. flavus ranged from 0.01x105cfu/g to 0.12x105cfu/g.