Abstract: The lysis effect of Fenton oxidation on residual sludge has been studied experimentally. The results show that Fenton reagent could effectively disintegrate sludge cells and release the intracellular substances in order to rea-lize the sludge reduction. SS and VSS are decreased by 22.31% and 25.58% respectively when reacted at 90 min. During the process of sludge disintegration, a lot of SCOD, TN, TP are dissolved out. The variation rules of the three of them in sludge liquid phase is echoed by those of SS and VSS, which increases rapidly first with the increase of reac-tion time and then increases slowly. Stability comes true when reacted at 90 min. The values are 2 487, 103.68, 2.36 mg/L, respectively. During the reaction process, part of organic nitrogen is oxidized to form NH₃^-N and NO₂^--N, and then further oxidized to produce NO₃^--N. Fenton oxidation can improve the sludge settling performance and reduce the SVI value. When reacted at 90 min, the SVI value is reduced from the initial 34 mL/g to 25.6 mL/g.

Key words: Fenton oxidation, sludge reduction, sludge lysis, settleability

摘要： 实验研究了Fenton氧化对剩余污泥的溶胞效果。结果表明：Fenton试剂能有效地破解污泥细胞，释放胞内物质，实现污泥减量。SS和VSS在反应90 min时，分别减少22.31%和25.58%；污泥破解过程中，SCOD、TN、TP大量溶出，污泥液相中三者的变化规律与SS、VSS相呼应，均随反应时间的增加呈先快速增加而后缓慢增加，在反应90 min时实现稳定，质量浓度分别为2 487、103.68、2.36 mg/L；反应过程中部分有机氮被氧化生成NH₃-N、NO₂^--N，进而被氧化生成NO₃^--N；Fenton氧化能够改善污泥沉降性能，降低SVI，反应90 min时，SVI由初始的34 mL/g降为25.6 mL/g。

关键词: Fenton氧化, 污泥减量, 污泥溶胞, 沉降性

CLC Number: 

• X703