Efficacy of ferrate oxidation and hydrolyze remnant activated sludge

Using ferrate oxidized remnant activated sludge base on that ferrate hold strong oxidation capability.The results showed that: ferrate could destroy activated sludgy structure,when initial activated sludge concentrations was 12 600 mg·L-1,m(Fe)/m(SS)=0.40 μg/mg.Ferrate made activated sludge floccules desegregations with increase of ferrate concentration the MLVSS went down.With different ferrate was put in,the different concentration activated sludge had different dissolving characteristic;the much higher initial concentration that activated sludge had,the much more SCOD,NH+4-N,TP was released.When activated sludge was 12 600 mg·L-1,ferrate was m(Fe)/m(SS)=0.40 μg/mg,the activated sludge released the maximum concentration SCOD,NH+4-N,TP.The liquid from sludge hydrolyze was treatment with waste water.The cost of sludge treatment is just 0.25 yuan/t that is lower than the sludge traditional treatment.