43 Pages

Microbiology of Metalworking Fluids

WithFrederick J. Passman

This chapter explains condition monitoring (CM) and discusses microbial contamination control strategies. Human microbiome research has shown that perturbations to a microbiome can cause both genomic and proteomic population shifts. In some cases, microbes that were either absent or constituted a small fraction of the total community become dominant after a disruptive event. Analogously, in metalworking fluid (MWF) systems, the result of genomic or proteomic changes is likely to be reduced MWF performance life. Funding for MWF microbiology research is vastly less than that for medical microbiology. Notwithstanding the problems associated with uncontrolled microbial growth in MWF systems, microbes play an essential role in biological waste treatment. Bacteria are the primary agents that reduce biochemical oxygen demand (BOD), chemical oxygen demand (COD), and total petroleum hydrocarbons (TPH) inside biological waste digesters.