1.

In which one of the following the BOD (Biochemical OxygenDemand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order

Answer»

SE LT S lt PE lt DE
SE lt PE lt S lt DE
PE lt S lt SE lt DE
S lt DE lt PE lt SE

Solution :Usually, BOD of PE =30 mg/lit., S=300-400 mg/lit., SE=2000-3500 mg/lit., and DE =3400 mg/lit. THEREFORE PE lt S lt SE lt DE


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