The second part involves finding the best speed for optimization. Eight different tests will be performed. Four in the first part and four in the second part. Each test will involve about 800 mL of the sample.
In the first part, four tests were created of alum concentrations of 0, 5, 20, and 40 mg/L. All were subjected to the stirring apparatus at the same speed of 30 rpm for 15 minutes to allow for flocculation. Initial turbidities were taken before starting the mixing. After being mixed, they were allowed to sit and settle for 20 minutes. Then measurements of the final turbidities were taken.
The second part of the lab’s setup was nearly identical to the first part. Out of the first four tests in the first part of the lab, two of the best coagulant dosages to provide the most optimum results were further analyzed. Two more samples of each dosage were recreated. One was subjected to a mixing speed of 60 rpm, while the other was subjected to 15 rpm. Mixing occurred for 15 minutes and settling for 15 minutes. …show more content…
Table 1 shows the final turbidity data measured in both part one and two of the lab procedure. Alum concentrations and rpm are also indicated on the table.
Table 1. Final measurements of turbidity for each coagulant dosage and mixing speed.
From Table 1, Figure 1 could be created to show the final turbidity measured in relation to the alum concentration.
Table 2 below shows the relevant final turbidity data required to calculate the velocity gradient (G). The table shows the two concentrations determined to be of the most optimal. From Table 2, Figure 2 could be created showing the final turbidity of the two dosages in relation to the velocity
In the first part, four tests were created of alum concentrations of 0, 5, 20, and 40 mg/L. All were subjected to the stirring apparatus at the same speed of 30 rpm for 15 minutes to allow for flocculation. Initial turbidities were taken before starting the mixing. After being mixed, they were allowed to sit and settle for 20 minutes. Then measurements of the final turbidities were taken.
The second part of the lab’s setup was nearly identical to the first part. Out of the first four tests in the first part of the lab, two of the best coagulant dosages to provide the most optimum results were further analyzed. Two more samples of each dosage were recreated. One was subjected to a mixing speed of 60 rpm, while the other was subjected to 15 rpm. Mixing occurred for 15 minutes and settling for 15 minutes. …show more content…
Table 1 shows the final turbidity data measured in both part one and two of the lab procedure. Alum concentrations and rpm are also indicated on the table.
Table 1. Final measurements of turbidity for each coagulant dosage and mixing speed.
From Table 1, Figure 1 could be created to show the final turbidity measured in relation to the alum concentration.
Table 2 below shows the relevant final turbidity data required to calculate the velocity gradient (G). The table shows the two concentrations determined to be of the most optimal. From Table 2, Figure 2 could be created showing the final turbidity of the two dosages in relation to the velocity