Question

Types of settling, coagulation-mixing, flocculation, clariflocculator, filtration, types of filters, rapid sand, slow sand, and pressure filters, methods of disinfection

Answer 1

Explanation:

Rapid sand filtration is a highly effective method to remove turbidity if it is correctly applied (BRIKKE & BREDERO 2003). Equally, solids formed during pre-treatment, i.e. coagulation-flocculation, are filtered. A well-operated RSF reduces turbidity to less than 1 NTN and often less than 0.1 NTU (WHO 1996)