Answer to Question 5 from Midterm 5-2-02

Typical cycle time is 1~6 month and it is shorter due to algae in summer. The expected period between scraping can be expected to be 4 to 8 weeks and the anticipated medium replacement will be when half of the bed has been removed, i.e. about every 2 – 3 y. ... Calculate the throughput rate at start of operation using the Kozeny’s equation ... ................
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