Daghrir, Rimeh; Drogui, Patrick; Blais, Jean-François 
ORCID: https://orcid.org/0000-0003-3087-4318 et Mercier, Guy
(2012).
Hybrid Process Combining Electrocoagulation and Electro-Oxidation Processes for the Treatment of Restaurant Wastewaters.
Journal of Environmental Engineering
, vol. 138
, nº 11.
pp. 1146-1156.
DOI: 10.1061/(ASCE)EE.1943-7870.0000579.
Résumé
The present study investigates the electrocoagulation-electro-oxidation (EC-EO) process for the treatment of restaurant wastewater (RWW) loaded with organic and inorganic matter, oil, grease, and suspensions solids. The EC-EO process was evaluated in terms of its capability to simultaneously produce an oxidant and coagulant agents by using either iron or aluminum electrodes arranged in a bipolar configuration or graphite electrodes arranged in a monopolar configuration in the same electrolytic cell. Relatively high concentrations of active chlorine (9.6 mg/min) and aluminum (20–40 mg Al/L) or iron (40–60 mg Fe/L) were produced in situ. The best performance for RWW treatment was obtained by using aluminum and graphite plates alternated in the electrode pack and operated at current of 0.4 A during 90 min of treatment with pH adjusted to approximately 7.0. Under these conditions, more than 98% of oil and greases (O&G) were removed, whereas chemical oxygen demand (COD) and biological oxygen demand (BOD) removal reached 90% and 86%, respectively. Likewise, more than 88% of soluble phosphate was removed, and the process was effective in removing turbidity (98%) and suspended solids (98%). The EC-EO process operated under the best conditions involved a total cost of US$1.56±0.01/m3 of treated restaurant effluent. This cost includes energy and electrode consumption, chemicals, and sludge disposal.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | electro-oxidation; electrocoagulation; restaurant wastewater; graphite electrode; aluminum electrode |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 19 nov. 2020 21:02 |
| Dernière modification: | 18 févr. 2022 20:08 |
| URI: | https://espace.inrs.ca/id/eprint/10560 |
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