【Daily Question】Wastewater Knowledge (August 21) (2 points for an answer, 4 points for a correct answer)
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The last edit to this post was made by Gorō’s Eight Trigrams Staff on 2015-8-27 at 08:17. Multiple-choice question: The rate of nitrification is related to the following factors ( ). A. pH value: When the pH value is 8.4 (under 20E conditions), the rate of nitrification is the fastest； B. Temperature: Nitrification proceeds faster at higher temperatures. Generally, the nitrification rate at 30°C is twice that at 17°C ； C. DO value: A higher DO value is required; when DO drops from 2 mg/L to 0.5 mg/L, the nitrification rate decreases from 0.09 to 0.045 kgNH4/(kgMLSS·day).
A. pH value: The nitrification rate is fastest at a pH of 8.4 (under 20E conditions)； B. Temperature: Nitrification proceeds faster at higher temperatures. Generally, the nitrification rate at 30°C is twice that at 17°C ； C. DO value: A higher DO value is required; when DO drops from 2 mg/L to 0.5 mg/L, the nitrification rate decreases from 0.09 to 0.045 kgNH4/(kgMLSS·day).
The rate of nitrification is related to the following factors (ABC)
Multiple-choice question: The rate of nitrification is related to the following factors (AB). A. pH value: When the pH value is 8.4 (under 20°C conditions), the rate of nitrification is the fastest； B. Temperature: Nitrification proceeds faster at higher temperatures. Generally, the nitrification rate at 30°C is twice that at 17°C ； C. DO value: A higher DO value is required; when DO drops from 2 mg/L to 0.5 mg/L, the nitrification rate decreases from 0.09 to 0.045 kgNH4/(kgMLSS•day).
Option A is correct; the first part of Option B is right, but I’m not sure about the second part
This question is included in the ABC wastewater treatment test questions
Isn’t that right? Isn’t the answer one of ABC?
A. B, C. ----------------------------
A. pH value: The nitrification rate is fastest at a pH of 8.4 (under 20E conditions)； B. Temperature: Nitrification proceeds faster at higher temperatures. Generally, the nitrification rate at 30°C is twice that at 17°C ； C. DO value: A higher DO value is required; when DO drops from 2 mg/L to 0.5 mg/L, the nitrification rate decreases from 0.09 to 0.045 kgNH4/(kgMLSS·day).
The rate of nitrification is related to the following factors ( ): A. pH value: The nitrification rate is highest when the pH value is 8.4 (under 20°C conditions)； B. Temperature: Nitrification proceeds faster at higher temperatures. Generally, the nitrification rate at 30°C is twice that at 17°C ； C. DO value: A higher DO value is required; when DO drops from 2 mg/L to 0.5 mg/L, the nitrification rate decreases from 0.09 to 0.045 kgNH4/(kgMLSS·day). Answer: ABC