FIG. 6.
Competitive exclusion of SRB by Sulfurospirillum sp. strain KW. Desulfovibrio sp. strain Lac15 (left panels) and Lac6 (right panels) were grown as pure cultures in CSB-A medium (A and B) or as cocultures with strain KW inoculated during mid-log phase (↓) (C and D). The concentrations of nitrate (□), nitrite (▴), lactate (♦), acetate (⋄), sulfide (•), and sulfate (○) and Eh (broken lines) are shown. Panels E and F show with greater resolution the sulfide (left scale) and nitrite (right scale) concentrations corresponding to panels C and D, respectively. All batch cultures were done in duplicate, with average deviations shown when the error bars exceeded the size of the symbols.