Removal of fluoride from photovoltaic wastewater by electrocoagulation and products characteristics

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Desalination and Water Treatment

Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tdwt20

Removal of fluoride from photovoltaic wastewater by

electrocoagulation and products characteristics

N. Drouiche ab_{, H. Lounici}b_{, M. Drouiche}b_{, N. Mameri}b_{& N. Ghaffour}c

a _{Silicon Technology Development Unit (UDTS) , 2, Bd Frantz Fanon BP399, Algiers ,} 16000 , Algeria Phone: +213 21433511 Fax: +213 21433511

b _{Laboratory of Environmental Biotechnologies , Ecole nationale Polytechnique d’Alger ,} 10, Av. Hassene Badi El-Harrach, Algiers , Algeria

c _{Middle East Desalination Research Center , P.O. Box21, P.C.133, Muscat , Sultanate of} Oman

Published online: 03 Aug 2012.

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To cite this article: N. Drouiche , H. Lounici , M. Drouiche , N. Mameri & N. Ghaffour (2009) Removal of fluoride from

photovoltaic wastewater by electrocoagulation and products characteristics, Desalination and Water Treatment, 7:1-3, 236-241

To link to this article: http://dx.doi.org/10.5004/dwt.2009.694

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Desalination and Water Treatment

www.deswater.com

7 (2009) 236–241

Removal of fluoride from photovoltaic wastewater by electrocoagulation

and products characteristics

N. Drouiche

a,b

_{*, H. Lounici}

b

_{, M. Drouiche}

b

_{, N. Mameri}

b

_{, N. Ghaffour}

c

a_{Silicon Technology Development Unit (UDTS), 2, Bd Frantz Fanon BP399, Algiers, 16000, Algeria}

Tel./Fax +213 21433511; email: [email protected]

b_{Laboratory of Environmental Biotechnologies, Ecole nationale Polytechnique d’Alger, 10, Av. Hassene Badi El-Harrach, Algiers, Algeria} c_{Middle East Desalination Research Center, P.O. Box21, P.C.133, Muscat, Sultanate of Oman}

Received 13 July 2008; accepted ion revised form 9 June 2009

A B S

t r

AC

t

Efficient treatment of fluoride-containing wastewater efficiently has been important for environmental engineers in Algeria. An appropriate concentration of fluoride in drinking water is required to prevent dental cavities, but long-term ingestion of water that contains more than a suitable level of fluoride causes bone disease and mottling of the teeth. The CMP wastewater from a UDTS. was characterized by high suspended solids (SS) content, chlorates, hydroxylamine, high turbidity (NTU), chemical oxygen demand (COD) concentration up to 7.00 mgl–1 _{and fluoride concentration}

up to 1000 mgl–1_{. Currently, the cheapest way to remove fluoride from semiconductor wastewater}

is to produce calcium fluoride (CaF2) by adding lime or another calcium salt. The aim of this paper

is to propose an efficient and low cost treatment of chemical mechanical polishing wastewater process based on electrocoagulation with iron bipolar electrodes. The performance of a pilot scale electrochemical reactor equipped with iron bipolar electrodes and an anode active area surface of about 170 cm2 _{was studied. In addition, sludge settling after electrocoagulation was characterized.}