Question: Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal
Options
A : by chemical coagulation.
B : in sedimentation tanks equipped with mechanical scrapper.
C : in vacuum filter.
D : in clarifiers.
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80% less than 200 mesh size particles are called
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TLV of ozone (O 3 ) and phosgene (COCl 2....
Most of the atmospheric air pollutants are present in large....
'Pneumoconiosis' is a disease caused by the inhalation of __________....
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