Nonylphenol polyethoxylate degradation in aqueous waste by the use of batch and continuous biofilm bioreactors

WATER RESEARCH

卷:43

Article

Di Gioia, Diana¹  Sciubba, Luigi¹  Bertin, Lorenzo¹  Barberio, Claudia²  Salvadori, Laura²  Frassinetti, Stefania³  Fava, Fabio¹ 

[1] Univ Bologna, Dept Appl Chem & Mat Sci, I-40131 Bologna, Italy

[2] Univ Florence, Dept Anim Biol & Genet, I-50125 Florence, Italy

[3] CNR, Inst Agr Biol & Biotechnol IBBA, Sect Pisa, I-56124 Pisa, Italy

关键词: Nonylphenol ethoxylates;    Wastewater;    Packed bed bioreactors;    Biofilm;    FISH;   

DOI  :  10.1016/j.watres.2009.04.011

来源: Elsevier

【 摘 要 】

Anaerobic bacterial consortium (Consortium A) was recently obtained from textile wastewater and was capable of degrading 4-nonylphenol and nonylphenol polyethoxylates (NPnEOs). In the perspective of developing a biotechnological process for the treatment of effluents from activated sludge plants fed with NPnEO contaminated wastewater, the capability of Consortium A of biodegrading an industrial mixture of NPnEOs in the physiological condition of immobilized cells was investigated. Two identically configured packed bed reactors were developed by immobilizing the consortium on silica beads or granular activated carbon. Both reactors were tested in batch and continuous mode by feeding them with water supplemented with NPnEOs. The two reactors were monitored through chemical, microbiological and molecular integrated methodology. Active biofilms were generated on both immobilization supports. Both reactors displayed comparable NPnEO mineralization under batch and continuous conditions. FISH analyses evidenced that the biofilms evolved with time by changing the reactor operation mode and the organic load. Taken together, the data collected in this study provide a preliminary strong indication on the feasibility of Consortium A-based biofilm technology for the decontamination of NPnEO containing effluents. (C) 2009 Elsevier Ltd. All rights reserved.

【 授权许可】

Free