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An anaerobic/anoxic/oxic (AAO) wastewater treatment system combining with a potassium ferrate (K2FeO4) oxidation side-stream reactor (SSR) was proposed for sludge reduction. Batch experiments showed that optimal K2FeO4 dosage and reaction time for sludge disintegration was 100mg/g suspended solids (SS) and 24h, respectively. Subsequently, an AAO-SSR and a conventional AAO were operated in parallel...
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