The term activated sludge is used for a common secondary treatment technique because

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    it is continually stirred and therefore activated.
     it involves use of a mixture of detritus-feeding organisms and is thus activated.
     it requires many workers, who are actively engaged in maintaining the system.
     it is very short lived, and therefore active compared to primary treatment.
asked Jun 25, 2012 in Environmental Science by anonymous
    

1 Answer

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it involves use of a mixture of detritus-feeding organisms and is thus activated.
answered Jun 26, 2012 by Geodude ~Top Expert~ (9,680 points)



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