Question:
A facultative pond system is employed for wastewater treatment. Which of the following statements is/are true:
A facultative pond system is employed for wastewater treatment. Which of the following statements is/are true:
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In aquatic environments like facultative ponds, the balance between oxygen production during the day and consumption during the night directly influences both dissolved oxygen levels and pH.
Updated On: Feb 4, 2026
- The dissolved oxygen concentration will be high during daytime compared to night-time.
- The pH will be high during daytime compared to night-time.
- The dissolved oxygen concentration will be low during daytime compared to night-time.
- The pH will be low during daytime compared to night-time.
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The Correct Option is A, B
Solution and Explanation
During daytime, photosynthesis takes place, and algae produce oxygen while consuming CO$_2$. This leads to an increase in the dissolved oxygen concentration. Additionally, the pH increases due to the consumption of CO$_2$ and the release of oxygen.
Therefore:
- The dissolved oxygen concentration will be high during daytime compared to night-time.
- The pH will also be high during daytime compared to night-time.
Thus, the correct answers are (A) and (B).
Therefore:
- The dissolved oxygen concentration will be high during daytime compared to night-time.
- The pH will also be high during daytime compared to night-time.
Thus, the correct answers are (A) and (B).
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