Enhancement of the activated sludge process by activated carbon produced from surplus biological sludge |
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Authors: | Maria J Martin Adriana Artola M Dolors Balaguer Miquel Rigola |
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Institution: | (1) Laboratori d'Enginyeria Química i Ambiental, Facultat de Ciències, Universitat de Girona, Campus de Montilivi, 17071 Girona, Spain |
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Abstract: | Surplus biological sludge from wastewater treatment operations was converted into activated carbon and then added to the aerated vessel of an activated sludge process treating phenol and glucose. The addition of activated carbon, either sludge-based or commercial, enhanced phenol removal from 58 to 98.7% and from 87 to 93% for COD with feed concentrations of 100 mg phenol l–1 and 2500 mg COD l–1. No differences were found between the activated sludge-activated carbon bench scale continuous reactors operating with either commercial or sludge-based activated carbon in spite of the higher adsorption capacity of the former. |
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Keywords: | activated sludge adsorption capacity phenol porosity powdered activated carbon |
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