Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 481, Issue -, Pages 121-128Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2014.02.024
Keywords
Tensoactive; Genapol (R) C-100; Co-substrate; Sucrose; PCR/DGGE
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Funding
- Laboratorio de Processos Biologicos-LPB/EESC/USP Sao Paulo, Research Foundation (FAPESP) [2010/18885-0]
- National Council for Scientific and Technological Development
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [10/18885-0] Funding Source: FAPESP
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The removal and degradation of the nonionic surfactant linear alcohol ethoxylate (LAE)Genapol (R) C-100 in an anaerobic fluidized bed reactor were evaluated with 4.7 mg LAE/L to 107A mg LAE/L added to the synthetic substrate (535 +/- 121 mg/L to 882 +/- 126 mg/L of organic matter). High removal efficiencies of the COD (chemical oxygen demand) (88%) and LAE (98%) were observed even at high surfactant concentrations during the 492 days of operation. The absence of sucrose in the synthetic substrate modified the microbial community. Similarity coefficients between the phases with sucrose and without sucrose were 74% and 59% for the Archaea and Bacteria domains, respectively. The higher LAE removal (98%) was obtained for the 97.9 mg LAE/L influent in the absence of the co-substrate, as well as the greater diversity of volatile fatty acid. At the end of the reactor operation 2.05 mg of LAE was adsorbed in the biomass and 98.5% was biodegraded. (C) 2014 Elsevier B.V. All rights reserved.
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