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Environmental Issues

Question

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During waste water treatment, trickling filter is used for

primary treatment

secondary aerobic treatment

secondary anaerobic treatment

tertiary treatment

Solution

B.

secondary aerobic treatment

Trickling filter is a fixed-bed biological reactor that operates under (mostly) aerobic conditions. It is used for secondary aerobic treatment. In this system, pre-settled wastewater is continuously trickled or sprayed over the filter. As the water migrates through the pores of the filter, organics are aerobically degraded by the biofilm covering the filter material.

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