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Title: Reverse osmosis concentrate treatment by chemical oxidation and moving bed biofilm processes
Author: Vendramel, S.M.R.
Justo Llopis, Ana
González Álvarez, Óscar
Sans Mazón, Carme
Esplugas Vidal, Santiago
Keywords: Ozonització
Osmosi inversa
Reverse osmosis)
Issue Date: 25-Oct-2013
Publisher: IWA Publishing
Abstract: In the present work, four oxidation techniques were investigated (O3, O3/UV, H2O2/O3, O3/H2O2/UV) to pre-treat reverse osmosis (RO) concentrate before treatment in a moving-bed biofilm reactor (MBBR) system. Without previous oxidation, the MBBR was able to remove a small fraction of the chemical oxygen demand (COD) (5-20%) and dissolved organic carbon (DOC) (2-15%). When the concentrate was previously submitted to oxidation, DOC removal efficiencies in the MBBR increased to 40-55%. All the tested oxidation techniques improved concentrate biodegradability. The concentrate treated by the combined process (oxidation and MBBR) presented residual DOC and COD in the ranges of 6-12 and 25-41 mg L 1 , respectively. Nitrification of the RO concentrate, pre-treated by oxidation, was observed in the MBBR. Ammonium removal was comprised between 54 and 79%. The results indicate that the MBBR was effective for the treatment of the RO concentrate, previously submitted to oxidation, generating water with an improved quality.
Note: Versió postprint del document publicat a:
It is part of: Water Science and Technology, 2013, vol. 68, num. 11, p. 2421-2426
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ISSN: 0273-1223
Appears in Collections:Articles publicats en revistes (Enginyeria Química i Química Analítica)

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