incoming waste, with BOD5 equal to about 200 mg/l is treated in a well-run secondary treatment plant that removes 90% of the BOD. You are to run a 5-day BOD test with a standard 300 mL bottle, using a mixture of treated sewage and the diluted water (no seed). assuming that the initial DO is 9.2 mg/L, a. Roughly what maximum volume of treated wastewater should you put in the bottle if you want to have at least 2.0 mg/L of DO at the end of the test (filling the rest of the bottle with water). b. if you make a mixture of half water and half treated waste water, what DO whould you expect after 5 days?
incoming waste, with BOD5 equal to about 200 mg/l is treated in a well-run secondary treatment plant that removes 90% of the BOD. You are to run a 5-day BOD test with a standard 300 mL bottle, using a mixture of treated sewage and the diluted water (no seed). assuming that the initial DO is 9.2 mg/L, a. Roughly what maximum volume of treated wastewater should you put in the bottle if you want to have at least 2.0 mg/L of DO at the end of the test (filling the rest of the bottle with water). b. if you make a mixture of half water and half treated waste water, what DO whould you expect after 5 days?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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incoming waste, with BOD5 equal to about 200 mg/l is treated in a well-run secondary treatment plant that removes 90% of the BOD. You are to run a 5-day BOD test with a standard 300 mL bottle, using a mixture of treated sewage and the diluted water (no seed). assuming that the initial DO is 9.2 mg/L,
a. Roughly what maximum volume of treated wastewater should you put in the bottle if you want to have at least 2.0 mg/L of DO at the end of the test (filling the rest of the bottle with water).
b. if you make a mixture of half water and half treated waste water, what DO whould you expect after 5 days?
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