water treatment

Which is correct for this trickling filter?

a)Due to the low BOD loading rate the biomass growth will be too little. Methanol needs to be dosed to keep the biomass alive.

b)Due to the high BOD loading rate the filter might clog. This can be prevented by effluent recycling in order to increase the shear stress on the biofilm.

c)Due to the high BOD loading rate the filter might clog. Because the hydraulic loading is also high, one should build an additional trickling filter to increase the filter volume.

d)Due to the high hydraulic loading, the biomass will shear off and problems with the conversion processes and effluent quality will occur. This can only be prevented by building an additional filter.

Please help it's urgent!!!!!

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asked by Anon

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