Effects of improved Fenton system on dredged sludge dehydration

Fenton system can degrade EPS in the sludge effectively and improve the performance of sludge sedimentation and flocculation. T he traditional technology is not suitable for the sludge of super water retention with high organic and clay con2 tents. In this paper, the effects of improved Fenton system on the dredged sludge dehydration were investigated. T he results showed that ( 1) quick lime has better effects than gypsum and fly ash when the Fenton system is combined with inorganic mod2 ifier; (2) when the quick lime amount is 1%, the SRF of dredged sludge is the lowest with a value of 6. 19@ 10 12 m/kg and the SRF reduction efficiency is 55. 70%; ( 3) sludge dehydration effect is the best when Fenton system is combined with CPAM; and ( 4) when the amount of 0. 1% CPAM is 50 mg/L, the SRF is 0. 83@ 10 11 m/kg and the SRF reduction efficiency is 99. 37%, which is about 91. 54% higher than that treated by Fenton system only.

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