Abstract

An innovative process based on ozone-enhanced biological degradation, carried out in anaerobic granular biomass system (SBBGR e Sequencing Batch Biofilter Granular Reactor),was tested at pilot scale for tannery wastewater treatment chosen as representative ofindustrial recalcitrant wastewater. The results have shown that the process was able tomeet the current discharge limits when the biologically treated wastewater was recirculatedthrough an adjacent reactor where a specific ozone dose of 120 mg O3/Linfluent wasused. The benefits produced by using ozone were appreciable even visually since the finaleffluent of the process looked like tap water. In comparison with the conventional treatment,the proposed process was able to reduce the sludge production by 25e30 times andto save 60% of operating costs.Molecular in situ detection methods were employed in combination with the traditionalmeasurements (oxygen uptake rate, total protein content, extracellular polymericsubstances and hydrophobicity) to evaluate microbial activity and composition, and thestructure of the biomass. A stable presence of active bacterial populations was observed inthe biomass with the simultaneous occurrence of distinctive functional microbial groupsinvolved in carbon, nitrogen and sulphate removal under different reaction environmentsestablished within the large microbial aggregates. The structure and activity of the biomasswere not affected by the use of ozone.

Autore Pugliese

• Di Iaconi Claudio , De Sanctis Marco

Tutti gli autori

• DI IACONI C.; DEL MORO G.; DE SANCTIS M.; ROSSETTI S.

Titolo volume/Rivista

Water research

Anno di pubblicazione

2010

ISSN

0043-1354

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile