Application of hybrid photocatalysis systems coupled with flocculation and adsorption to biologically treated sewage effluent for organic removal |
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| Authors: | Ho Kyong Shon Saravanamuthu Vigneswaran Jong-Ho Kim Huu Hao Ngo |
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| Affiliation: | (1) Faculty of Engineering, University of Technology, Sydney, P.O. Box 123, Broadway, NSW, 2007, Australia;(2) Faculty of Applied Chemical Engineering & RRC for Photonic Materials and Devices, Chonnam National University, Gwangju, 500-757, Korea |
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| Abstract: | The application of a photocatalysis hybrid system coupled with flocculation and adsorption in treating biologically treated
sewage effluent (BTSE) was investigated. The removal of organic matter was studied in terms of dissolved organic matter (DOC),
removal of hydrophobic (HP), transphilic (TP) and hydrophilic (HL) fractions, and molecular weight (MW) distribution. The
photooxidation removed the majority of MW (263, 580, 865, and 43109 daltons) within the first 30 minutes of operation. The
removal of MW range of organic matter of 330 daltons was low. DOC removal of HP and TP was high (80%). DOC removal from HL
fraction was, however, minimum. The photocatalytic system with simultaneous PAC adsorption and FeCl3 flocculation removed the effluent organic matter (EfOM) up to 90%. Therefore, photocatalysis with the ferric chloride (FeCl3) flocculation and PAC adsorption hybrid system can be a possible option in the removal of DOC from BTSE for water reuse. |
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| Keywords: | Adsorption Flocculation Hydrophobic Hydrophilic Molecular Weight Distribution Photocatalysis Transphilic Wastewater |
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