Optimumthiosulfate concentration
The higher thiosulfate concentrations resulted higher growth in 52 mM buffer medium (Table 1).The highest sulfate production was observed in 10 g/L thiosulfate concentration. The sulfate concentration was 5,400 and 6,120 mg/L after 36 and120 h incubation (69.8 and 79.1 % sulfurconversion). The growth of HTN wasapparently corresponded with sulfate productionand pH drop.