Tennessee Wastewater Operator Practice Exam

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Study for the Tennessee Wastewater Operator Exam. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get exam-ready!

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What is one goal of a biological treatment system?

Convert BOD into biomass
Remove all heavy metals
Filter out large debris
Increase the pH of the water

The correct answer is: Convert BOD into biomass

One goal of a biological treatment system is to convert biochemical oxygen demand (BOD) into biomass. This microbial process is essential in wastewater treatment as it effectively reduces the organic matter present in the water. In a biological treatment system, microorganisms consume organic pollutants, thereby utilizing the BOD as a source of energy for their growth and reproduction. This results in the formation of biomass, which is essentially the mass of microbial cells produced through the breakdown of organic materials. Reducing BOD levels is critical because high BOD indicates the presence of large amounts of organic waste that can deplete oxygen in water bodies, leading to negative impacts on aquatic life. Hence, the conversion of BOD into biomass not only helps in treating the wastewater but also contributes to the overall goal of enhancing water quality before it is discharged or reused.