Degradation of chlorinated aromatics by fenton oxidation and methanogenic digester sludge

Abstract Chlorinated aromatic compounds were oxidatively degraded by Fenton reaction (a chemical oxidation by H 2 O 2 in the presence of Fe 2+ as catalyst). The breakdown products, mainly consisting of formate and oxalate, were readily converted to methane by methanogenic digester sludge without any acclimation with the products. This process was quite effective for decomposition of chlorobenzoates, chlorophenols, dichlorophenols and p -chlorobiphenyl. The methanogenic degradation of oxalate was found to be responsible for Oxalobacter formigenes and Methanobacterium -like methanogens in the digester sludge.

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