Answer:

1:1500 pcs/liter

2: 324 pcs/liter

3: 386.4585. 386 pcs/liter

1. E.coli concentration in river water is 12,000 units/L. Water is taken from this river into a completely stirred collection reservoir with a volume of V=420,000 m3. The flow rates entering and leaving the reservoir are equal and Q=750m3/h. Since the reaction constant is =0.3 day 1, calculate the total coliform concentration at the outlet of the reservoir. 2. Based on the values in the first question, calculate the total number of coliforms at the outlet when there are three series-connected reservoirs with a total volume of V. 3. The total coliform concentration was measured as 25,000 units/ L in the bacteriological analyzes carried out in the dam lake where drinking water is supplied. Water is periodically taken from a dam lake to four completely stirred equalization tanks connected in series with a total volume of 470,000m3. The flow rates entering and leaving the reservoir are equal and Q=800m3/h. Since the reaction constant is =0.3 day 1, calculate the total coliform concentration at the outlet of the collecting reservoirs