Coal washing waste water containing about 3% suspended solids (compris – McqOptions

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1.	Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal ?
A.	By chemical coagulation
B.	In sedimentation tanks equipped with mechanical scrapper
C.	In vacuum filter
D.	In clarifiers
Answer» C. In vacuum filter

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