The F/M ratio is defined as pounds of BOD per unit of biomass, typically per pounds of MLSS. Which option correctly expresses this ratio?

Study for the Texas Wastewater D Test. Use flashcards and multiple choice questions, each with hints and explanations. Prepare thoroughly for your exam!

Multiple Choice

The F/M ratio is defined as pounds of BOD per unit of biomass, typically per pounds of MLSS. Which option correctly expresses this ratio?

Explanation:
The F/M ratio represents how much substrate (BOD) is available to each unit of biomass (MLSS). It is a mass-to-mass relationship, so expressing it as pounds of BOD per pounds of MLSS keeps the denominator and numerator on the same basis. Therefore, the correct form is pounds of BOD per pounds MLSS. The other expressions mix units (per gallon or per liter) or use different mass units (kilograms, grams) and don’t match the stated mass-to-mass convention. Some metric versions exist (kg/kg), but within this context the pounds-to-pounds form is the standard.

The F/M ratio represents how much substrate (BOD) is available to each unit of biomass (MLSS). It is a mass-to-mass relationship, so expressing it as pounds of BOD per pounds of MLSS keeps the denominator and numerator on the same basis. Therefore, the correct form is pounds of BOD per pounds MLSS. The other expressions mix units (per gallon or per liter) or use different mass units (kilograms, grams) and don’t match the stated mass-to-mass convention. Some metric versions exist (kg/kg), but within this context the pounds-to-pounds form is the standard.

More Multiple Choice Questions
Subscribe

Get the latest from Passetra

You can unsubscribe at any time. Read our privacy policy