Assign_2-1_Clarification_

Assign_2-1_Clarification_ - of 200 000 gpd What is its...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1) It has been determined that the 4 mgd of water that is flowing into your treatment plant must have its alkalinity raised by 50 mg-CaCO3/L. How many pounds of a Soda Ash (Na 2 CO 3) ) must be added daily? Assume the soda ash is 90 pecent pure and completely dry. 2) If a 200,000 gpd flow of water bypassing your softening plant has a hardness of 100 mg-CaCO 3 /L and your plant produces a flow of 100,000 gpd at a hardness of 20 mg- CaCO 3 /L. what is the hardness of the overall flow when they are re-blended? ?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
3) A flow off 40,000 gpd is passed thought a clarifier with a diameter of 20 feet. What is the overflow rate? 4) A Tank two meter deep tank that is 5 meters long and 3 meters across receives a flow
Background image of page 2
Background image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: of 200, 000 gpd. . What is its hydraulic residence time? 5) You have concrete side molds for tanks with a diameter of 20 feet and depth five feet. How many tanks would you need to provide a hydraulic retention time of 1 hour for a daily flow of 1 mgd? What is the overflow rate for this configuration? 6) A 200 cubic meter batch of water has an alkalinity of 150 mg-CaCO 3 /L. Assuming all the alkalinity is attributed to the carbonate ion, how much CaCO 3 (limestone) would be produced if all the C0 3 = is forced to precipitate by calcium (Ca ++ ) addition? Express results in units of kilograms....
View Full Document

{[ snackBarMessage ]}

Page1 / 3

Assign_2-1_Clarification_ - of 200 000 gpd What is its...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online