On the concentration of Pb 0 ppm, the lag phase of Rhizopus SP. occurred on day 3 to day heading 4. The log phase occurs on day 4 towards the day to 5. However, it can be seen on the graph of the decline. This can be caused because of possible inaccuracies at the moment of going of filtering, pengovenan, and weighing. On the concentration of Pb 0 ppm. At a concentration of 0 ppm no stationary phase. Phase of death occurs on the 5 heading 6. Pb at concentrations of 10 ppm, the lag phase of Rhizopus SP. occurred on day 4 towards the day to 5. The log phase occurs on day 5 towards day 6 to day 7. Pb at concentrations of 10 ppm are not stationary phase and the phase of death. Pb at concentrations of 50 ppm, the lag phase of Rhizopus SP. occurred on day 3 to day heading 4. Extended log phase occurs on day 4 to day 6. Stsationer phase occurs on day 6 to day 7. On the concentration of Pb 0 ppm of Rhizopus SP. is not experiencing a phase of death. Based on the growth curve of Rhizopus SP. can be seen that the highest growth at 0 ppm Pb concentration of means on a medium no addition of Pb as Pb.
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