Sewage sludge is the material which is generated upon conventional wastewater
treatment processes and it is must be treated to reduce the hazards and environmental impact.
Wet oxidation (WO) is applied to treat industrial and municipal sewage sludge (3000-
6000mg/L total organic carbon). Experiments were carried out to investigate the effects of
temperature, H2O2 excess (HE), the initial TOC, residence time and concentration of catalyst
on oxidation of the municipal sewage sludge. The results showed that greater than 90% TOC removal
from sewage sludge was achieved using catalytic wet oxidation (CWO). Homogenous catalyst, FeSO4 and
CuSO4 showed effective removal for sewage sludge. It was concluded that CWO was an effective process for
removing organic compounds from sewage sludge.
Keywords: Sewage sludge, soluble catalysts, wastewater treatment, wet oxidation.
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