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English Translations » 历史存档[信息] » Daily Water Treatment Question (11.24)

Daily Water Treatment Question (11.24)

2016-11-24View Original

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Single-choice question: 1. The reason why the pH value in the O tank of the A/O process should be greater than 6.5 is ____. A. Improve nitrification efficiency B. Promote sludge growth C. Improve denitrification efficiency D. Increase oxygen uptake rate 2. The minimum settling velocity of particles in a sedimentation tank is related only to ____. A. Determined sedimentation efficiency B. Particle diameter C. Particle density D. Sedimentation time A;A
Reply #22016-11-24
1. The reason why the pH value in the O tank of the A/O process should be greater than 6.5 is __C__. A. Improve nitrification efficiency B. Promote sludge growth C. Improve denitrification efficiency D. Increase oxygen uptake rate 2. The minimum settling velocity of particles in a sedimentation tank corresponds only to _A___. A. Determined sedimentation efficiency B. Particle diameter C. Particle density D. Sedimentation time
Reply #32016-11-24
1. The reason why the pH value in the O tank of the A/O process should be greater than 6.5 is ____. B. Promoting sludge growth 2. The minimum settling velocity of particles in the sedimentation tank corresponds only to ____. B. Particle diameter

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Translated at 2026-07-20 22:54:54

Original: https://bbs.hcbbs.com/thread-1644848-1-1.html

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