Pharmaceutical wastewater treatment using granular activated carbon and UV/H 2 O 2  processes: Experimental analysis and modelling | Zendy

Ghafoori Samira | Zendy; Shah Kiran K. | Zendy; Mehrvar Mehrab | Zendy; Chan Philip K. | Zendy

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Pharmaceutical wastewater treatment using granular activated carbon and UV/H 2 O 2 processes: Experimental analysis and modelling

Author(s) -

Ghafoori Samira,

Shah Kiran K.,

Mehrvar Mehrab,

Chan Philip K.

Publication year - 2014

Publication title -

the canadian journal of chemical engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.404

H-Index - 67

eISSN - 1939-019X

pISSN - 0008-4034

DOI - 10.1002/cjce.21981

Subject(s) - adsorption , activated carbon , chemistry , desorption , wastewater , total organic carbon , langmuir adsorption model , carbon fibers , chemical oxygen demand , chromatography , langmuir , pulp and paper industry , nuclear chemistry , environmental chemistry , environmental engineering , organic chemistry , materials science , environmental science , composite number , engineering , composite material

The treatment of a synthetic pharmaceutical wastewater was studied using granular activated carbon (GAC) adsorption, UV/H 2 O 2 process, and their combination. Experimental results reveal that GAC adsorption alone has 79% efficiency in total organic carbon (TOC) removal in 10 min breakthrough time with the dosage of 333.33 mg activated carbon/L. The adsorption data are fitted well with the Langmuir adsorption isotherm. The UV/H 2 O 2 process alone at 6 h hydraulic retention time with optimum dosage of 4.25 mgH 2 O 2 /mgCOD shows 29 and 26% TOC reduction using 185 and 254 nm UV lamps, respectively. The kinetic modelling of the UV 254 /H 2 O 2 process is developed using chemical oxygen demand (COD) and TOC as lumped parameters. A good agreement between model predictions and experimental data is confirmed. In combined processes, pre‐treated pharmaceutical wastewater by UV 254 /H 2 O 2 followed by GAC adsorption process along with the desorption of contaminants from GAC and the subsequent treatment of the condensed steam by UV 254 /H 2 O 2 process leads to 82 % TOC removal efficiency. On the other hand, the GAC adsorption along with UV 254 /H 2 O 2 treatment of regenerant (condensed steam) from the desorption process leads to 88 % TOC removal at optimum conditions.

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