题目内容
The sedimentation efficiency of an ideal sedimentation tank is related to its _____.
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When chlorine disinfection process is used, free chlorine disinfection method is used when the ammonia nitrogen concentration of raw water is high; when the ammonia nitrogen concentration of raw water is low, combined chlorine disinfection method is used.
Filtration without coagulation will influence the flotation efficiency.
The demand of bubble dispersity in flotation is that the diameter of bubbles should be less than 100 um. But in clean water, the bubble dispersity usually cannot reach this demand.
When treating oily wastewater by floatation, dosing clay particles will increase the flotation efficiency.
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