Patent ID: 7833551

Claim:
A method of inhibiting sulfide production by sulfate-reducing bacteria (SRB), said method comprising the step of contacting the SRB with a combination of: (a) a first concentration of a non-oxidizing biocide component, wherein said biocide component is selected from the group consisting of formaldehyde, glutaraldehyde, acrolein, quaternary amine compounds, cocodiamine, bronopol, 2-2-dibromo-3-nitrilo-propionamide (DBNPA), isothiazolone, carbamates, metronidazole, and combinations of one or more thereof, wherein said first concentration is less than about 90% of the minimum inhibitory concentration (MIC) of the biocide component; and (b) a second concentration of a metabolic inhibitor component, selected from the group consisting of nitrite, molybdate, tungstate, selenate, anthraquinone and combinations of one or more thereof, wherein said second concentration is less than about 90% of the MIC of the metabolic inhibitor component, thereby producing a synergistic effect on inhibiting sulfide production by the SRB as compared with either component alone.