Improve acid production of excess sludge anaerobic digestion using potassium ferrate or ferrate anode solution.

Potassium ferrate (K2FeO4) has been widely applied as a pretreatment agent for residual sludge digestion, but the complete synthesis of its solid form is costly. In this study, the use of ferrate anode solution (FAS) was examined as a more economical…

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