Modelling PAHs removal in activated sludge process: effect of disintegration | Zendy

I. Mozo | Zendy; Mansour Bounouba | Zendy; E. Mengelle | Zendy; Nicolas Lesage | Zendy; Mathieu Spérandio | Zendy; Yolaine Bessière | Zendy

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Modelling PAHs removal in activated sludge process: effect of disintegration

Author(s) -

I. Mozo,

Mansour Bounouba,

E. Mengelle,

Nicolas Lesage,

Mathieu Spérandio,

Yolaine Bessière

Publication year - 2019

Publication title -

water science and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.406

H-Index - 137

eISSN - 1996-9732

pISSN - 0273-1223

DOI - 10.2166/wst.2019.322

Subject(s) - activated sludge , degradation (telecommunications) , chemistry , adsorption , sonication , environmental chemistry , organic matter , pulp and paper industry , environmental science , environmental engineering , chromatography , sewage treatment , telecommunications , organic chemistry , computer science , engineering

The removal of polycyclic aromatic hydrocarbons (PAHs) in activated sludge was evaluated using two laboratory-scale bioreactors, coupled or not with a disintegration system (sonication). Mass balances performed on each system underlined that PAHs removal was significantly improved after sludge disintegration, especially for the higher molecular weight PAHs studied, which tended to adsorb to suspended matter. A model was developed in order to study the effect of sludge disintegration on the content of dissolved and colloidal matter (DCM), and to predict the potential impacts on PAHs availability and degradation. Results showed that this new model was efficient for capturing apparent degradation improvement trends and for discriminating between the involved mechanisms. This study showed that DCM content increased after sludge disintegration, and proved to be the main driver for improving PAHs apparent degradation.

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