According to FM Wilhelm (Encyclopedia of Inland Waters, 2009), pristine waters have up to 1 ppm of BOD, moderately polluted waters 2–8 ppm, and treated municipal sewage up to 20 ppm, and standards for the discharge of effluent from wastewater treatment plants have the range of over 20 ppm and require a minimum flow in receiving waters to ensure sufficient dilution. The calculated DO value at the initial day was 316 ppm and after a 5-day incubation period, the DO value was calculated to be 298 ppm. Calculate the BOD5 and give its classification. 8 ppm, moderately polluted water 89 ppm, wastewater treatment plant effluent 18 ppm, treated municipal sewage 1 ppm, pristine water
According to FM Wilhelm (Encyclopedia of Inland Waters, 2009), pristine waters have up to 1 ppm of BOD, moderately polluted waters 2–8 ppm, and treated municipal sewage up to 20 ppm, and standards for the discharge of effluent from wastewater treatment plants have the range of over 20 ppm and require a minimum flow in receiving waters to ensure sufficient dilution. The calculated DO value at the initial day was 316 ppm and after a 5-day incubation period, the DO value was calculated to be 298 ppm. Calculate the BOD5 and give its classification. 8 ppm, moderately polluted water 89 ppm, wastewater treatment plant effluent 18 ppm, treated municipal sewage 1 ppm, pristine water
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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According to FM Wilhelm (Encyclopedia of Inland Waters, 2009), pristine waters have up to 1 ppm of BOD, moderately polluted waters 2–8 ppm, and treated municipal sewage up to 20 ppm, and standards for the discharge of effluent from wastewater treatment plants have the range of over 20 ppm and require a minimum flow in receiving waters to ensure sufficient dilution. The calculated DO value at the initial day was 316 ppm and after a 5-day incubation period, the DO value was calculated to be 298 ppm. Calculate the BOD5 and give its classification.
-
8 ppm, moderately polluted water
-
89 ppm, wastewater treatment plant effluent
-
18 ppm, treated municipal sewage
-
1 ppm, pristine water
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