Treatment of organic wastewater using the Fenton method
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Our company uses the Fenton method to treat organic wastewater, with the pH level maintained around 3. Ferrous sulfate is added at a dosage of COD*5g, and hydrogen peroxide is added at a dosage of COD*10g. After the reaction is complete, an alkali is added to raise the pH to 7. The system was working normally before, but recently it has been observed that the sedimentation effect after treatment is poor: the water becomes cloudy, opaque, and yellow in color. Adding flocculants does not help either. Could everyone please help analyze what might be causing this issue and how it can be resolved?
There might be too much ferrous ion; try reducing the amount.
5g of COD* per gram of ferrous sulfate is added, and 10g of COD* per gram of hydrogen peroxide is added. A bit too much
After the reaction is complete, add an alkali to adjust the pH to 7; it’s a bit low