| 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 12600 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 12600mg·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. |
