What parameters require treatment with what priority

Reference no: EM132312733

Advanced Water and Wastewater Treatment

Assignment : Drinking Water Treatment Plant Design

A newly formed city wants to construct a drinking water treatment plant and distribution system. Design capacity of the treatment plant is 1+0.2*last digit of the student IDm3/s, with an initial demand expected to be only half the design capacity. The first customer is expected to receive water after 24 hr of disinfection and customer at the end of the distribution system is expected to be around 3 days after the disinfection. Consider chlorineis used as a disinfectant, for both primary and secondary disinfection.

1. Based on chemical composition of source water quality data given below what can you tell about the water quality. What parameters require treatment with what priority?

2. Design coagulation (size of the tank and mixing speed), flocculation (size of the tank and mixingpower, mixer dimension and revolutions), sedimentationtank (dimension and removal efficiency), rapid sand filtration, and disinfection facilities.

3. Suggest a process for Fe2+ and Mn2+ removal and where would you place it in the process train and why. Calculate a theoretical need for an oxidant consider chlorine and permanganate and discuss pros and cons for each.

4. Interpret Table 1 with jar test data and what conditionswould you select and why?

5. Using the data on enhanced coagulation (Table 2),propose a modification to the design necessary to meet the new regulation that will be specifying a maximum 80 and 60 ppb ofTTHM and HAA5, respectively.

6. If customers are neither expected to receive more than 0.6 mg/L (aesthetic requirement)nor less than 0.2 mg/L of chlorine (health requirement), how do you think you would meet this condition?

7. Calculate the CT value achieved by your dosing and compare with the table of values given in the lecture notes to understand whether the CT value is met by your dosing.

8. Prioritise the following considerations: aesthetic, health, DBP, CT.

9. Discuss other problems associated with dissolved organic carbon (DOC) in water.

10. At what pH should be the distribution system operated and why? What can be done to reduce water hardness and prevent calcite build up on water heaters?

Attachment:- Drinking Water Treatment Plant Design.rar

Reference no: EM132312733

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