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In an ideal settling tank, a particle is completely removed if its terminal settling velocity is greater or equal to the depth/detention time ratio. a. Calculate the diameter of the smallest particle with a specific gravity 1.6 that would be removed in a rectangulat basin that is 45m long, 6m wide, and 2m deep with a retention time of 30 min. b. To improve removal efficiency, a consultant has proposed to install plates 6m wide and 2m high inclined at 60o to the horizontal and placed 10 cm apart (perpendicular distance between the plates) along the whole length of the tank. Find the new area available for settling and hence, compute the diameter of the smallest particle that will be removed. Comment on the results. specific gravityÊÇÒ»¸öʲô¸ÅÄËã³Á½µËÙ¶Èʱ²»ÐèҪˮµÄÃܶÈÂ𣿠´ó¸ÅµÃ½âÌâ˼·ÊÇʲô£¿Ê®·Ö¸Ðл£¡£¡ |
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