Problem Solved: Percent Solids Recovery - Wastewater Math

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This question comes from the California Wastewater grade 4 certification exam sample questions that can be found here: http://www.swrcb.ca.gov/water_issues/programs/operator_certification/docs/4ques.pdf

The problem reads:
A 2 meter belt press is being used to dewater anaerobically digested sludge (3.8% TS) at the rate of 75 gallons/min. It is operated 6.5 hours per day. The feed sludge is conditioned with a polymer solution and then fed to the press. A 25 cubic yard truck full (level road) of sludge cake (20.5% TS, bulk density 65.8 Lbs/ft3) is hauled away at the end of each day. Calculate the percent solids recovery.

Видео Problem Solved: Percent Solids Recovery - Wastewater Math канала American Water College