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| Detoxification of olive mill wastewater by electrocoagulation and sedimentation processes [An article from: Journal of Hazardous Materials] | ![Detoxification of olive mill wastewater by electrocoagulation and sedimentation processes [An article from: Journal of Hazardous Materials]](http://ecx.images-amazon.com/images/I/512W9E5PV5L._SL160_.jpg)
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Category: Book
Authors: S. Khoufi, F. Feki, S. Sayadi
Publisher: Elsevier
Studio: Elsevier
Manufacturer: Elsevier
Label: Elsevier
Format: Html
Language: English (Published)
Media: Digital
ASIN: B000PDYJGS
Publication Date: April 2, 2007
Availability: Available for download now
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Product Description
This digital document is a journal article from Journal of Hazardous Materials, published by Elsevier in 2007. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
Olive mill wastewater (OMW) is characterised by its high suspended solids content (SS), high turbidity (NTU), chemical oxygen demand (COD) concentration up to 100gl^-^1 and toxic phenolic compounds concentration up to 10gl^-^1. This study examined the effect of a physico-electrochemical method to detoxify olive mill wastewater prior an anaerobic biotreatment process. The proposed pre-treatment process consisted in a preliminary electrocoagulation step in which most phenolic compounds were polymerised, followed by a sedimentation step. The BOD"5/COD ratio of the electrocoagulated OMW increased from 0.33, initial value, to 0.58. Furthermore, the sedimentation step yielded the removal of 76.2%, 75% and 71% of phenolic compounds, turbidity and suspended solid, respectively, after 3 days of plain settling. The combination of electrocoagulation and sedimentation allowed a COD reduction and decoloration of about 43% and 90%, respectively. This pre-treatment decreases the inhibition of Vibrio fisheri luminescence by 66.4%. Continuous anaerobic biomethanization experiments conducted in parallel with raw OMW and electrocoagulated OMW before and after sedimentation at a loading rate of 6g CODl^-^1day^-^1, proved that the final pre-treated OMW was bioconverted into methane at high yield while raw OMW was very toxic to anaerobic microorganisms.
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