A chemical mixing basin is to be designed to blend chlorine and treated wastewater. The basin flow is 700 gallons per minute and the basin dimensions are 5 feet by 5 feet by 5 feet water depth. The basin will have a single mechanical blender that will transfer 100% of the mixing energy from the blades to the water. The wastewater temperature will vary from 35 F to 70 F. The selected mixing intensity in the basin shall be a minimum of 600 1/sec. What size motor (horsepower) is required for the mixer?
Answer the following:
What is hardness in water and why is it important?
Why is too much fluoride in drinking water a problem?
What is the drinking water standard for fluoride?
For benzene, what are the federal epa and State of NJ drinking water standards?
What is considered a safe level of benzene in drinking water?
If you were designing a drinking water treatment facility for the removal of benzene, what would you set as a treatment goal and why? How would you involve the client in the decision?