WB JEE Medical WB JEE Medical Solved Paper-2015

  • question_answer During waste water treatment, trickling filter is used for

    A)  primary treatment

    B)  secondary aerobic treatment

    C)  secondary anaerobic treatment

    D)  tertiary treatment

    Correct Answer: B

    Solution :

     During wastewater treatment, trickling filter is used for secondary aerobic treatment. Trickling filter is a fixed-bed biological reactor that operates under (mostly) aerobic conditions. Trickling filters are a secondary treatment after a primary  treatment.   In  which  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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