Texas Wastewater Class B Practice Exam

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Prepare for the Texas Wastewater Class B Exam. Study with flashcards and multiple choice questions, each question accompanied by hints and explanations. Ace your exam!

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Which test provides the best information on how efficiently a trickling filter is operating?

Solids retention time
Percent BOD Removal
Sludge volume index
Flow rate measurement

The correct answer is: Percent BOD Removal

The most effective measure of a trickling filter's efficiency is the percent Biological Oxygen Demand (BOD) removal. This test evaluates the filter's performance by quantifying how much organic matter is being removed from the wastewater as it passes through the filter media. A high percentage of BOD removal indicates that the microorganisms colonizing the media are successfully converting and degrading organic pollutants, thereby demonstrating the filter's operational efficiency. In contrast, the solids retention time focuses primarily on how long the solids are held in the system, which doesn't directly reflect the biological degradation happening within the filter. The sludge volume index is a measure of the amount of sludge produced and its settleability, which is also not a direct measure of the filter's treatment ability. Flow rate measurement pertains to the volume of wastewater being treated but does not indicate the effectiveness of the trickling filter in breaking down organic pollutants.