Effects of Different Oxidation Agents on Sludge Dewatering and Hydrolysis Performance
YUAN Hongying
YANG Yuping
WANG Yanning
WANG Ting
DU Yimei
Abstract：The potential effects of different oxidation agents on sludge dewatering and hydrolysis performance were investigated.Specific resistance of filtration (SRF) and SCOD in sludge filtrate were used as evaluation index,and six oxidants ineluding Fenton reagent,sodium chloride (ClO2),calcium chloride (Ca(ClO)2),sodium hypochlorite (NaClO),potassium fen'ate (K2FeO4),potassium permanganate (KMnO4) were researched.The results indicated that Fenton reagent can catalyze dewaterability of the sludge compared with other oxidation agent,when 0.90 g/L of Fe2+ and 5g/L of H2O2 were added into the sludge,the specific resistance of the treated sludge had only 25％ of that of the original sludge.However,comparison with the same type of oxidation found that the performance of Ca (ClO)2 to improve sludge dewatering is better than ClO2 and NaClO,K2FeO4 is better than KMnO4,this suggest that adding of oxidants containing flocculation effect ion into the sludge was in favor of the dehydration of the sludge.It was also found that other oxidants joined is very conducive to sludge disruption and organic matter releasing,such as the addition of K22FeO4 making the SCOD content in sludge filtrate increased more than 50 times.
Keywords：sludge dewateringFenton reagentoxidationSCOD
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 33-37 )