Question 5008 of 234 · California Wastewater Operator Exam
A pond that is pink or red in color is often due to
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Correct answer to question 5008
- B: purple sulfur bacteria in an overloaded or low-oxygen pond
Explanation
Pink or red color results from photosynthetic sulfur bacteria that thrive when sulfide is present. It signals organic overloading and odor risks.
More questions: Stabilization Ponds
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