Influence of co-substrates in the anaerobic degradation of an anionic surfactant

Brazilian Journal of Chemical Engineering

D. Y. Okada²  A. S. Esteves²  T. P. Delforno²  J. S. Hirasawa²  I. C. S. Duarte¹  M. B. A. Varesche² 

[1] ,University of São Paulo School of Engineering of São Carlos Department of Hydraulics and SanitationSão Carlos SP ,Brazil

关键词: Linear alkylbenzene sulfonate;    Acetic acid;    Methanogenic archaea;    UASB;    FISH;   

DOI  :  10.1590/S0104-66322013000300008

来源: SciELO

【 摘 要 】

The removal of linear alkylbenzene sulfonate (LAS) was evaluated in a UASB reactor using short-chain alcohols (ethanol and methanol) and complex co-substrate (yeast extract). Using only methanol and ethanol as co-substrates resulted in removal of LAS between 30 and 41%. At the end, addition of a complex substrate (yeast extract) increased the removal of LAS to 50%. During the assay, water supply aeration increased the volatile fatty acid of the effluent (70 mg HAc.L-1) and decreased the removal of LAS (from 40 to 30%). According to the fluorescence in situ hybridization (FISH) results, the amount of Archaea decreased due to water supply aeration (from 64 to 48%). Furthermore, addition of complex co-substrate increased the total anaerobic bacteria and methanogenic archaea content (three and four log units, respectively), which were estimated using the most probable number technique.

【 授权许可】

CC BY   
 All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License