Biodegradation of linear alkylbenzene sulfonate in commercial laundry wastewater by an anaerobic fluidized bed reactor

Autor(es)

Braga, Juliana K. ^[1] ; Motteran, Fabricio ^[1] ; Macedo, Thais Z. ^[1] ; Sakamoto, Isabel K. ^[1] ; Delforno, Tiago P. ^[1] ; Okada, Dagoberto Y. ^[1] ; Silva, Edson L. ^[2] ; Varesche, Maria Bernadete A. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Hydraul & Sanitat, Sch Engn Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Chem Engn, BR-13560 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART A-TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING; v. 50, n. 9, p. 946-957, JUL 29 2015.
• Citações Web of Science: 14

Resumo

The biodegradation of linear alkylbenzene sulfonate (LAS) from commercial laundry wastewater was evaluated in an anaerobic fluidized bed reactor (FBR) fed with synthetic substrate (598mg L-1 to 723mg L-1 of organic matter) supplemented with 9.5 +/- 3.1mg L-1 to 27.9 +/- 9.6mg L-1 of LAS. The average chemical oxygen demand (COD) removal efficiency was 89% and the biodegradation of LAS was 57% during the 489days of anaerobic FBR. Higher levels of volatile fatty acids (VFA) were observed in the effluent at the stage with the best LAS removal performance. Increasing the surfactant concentration did not increase the VFA production in the effluent. The predominant VFAs after the addition of LAS were as follows: isovaleric acid and valeric acid, followed by propionic acid, caproic acid and formic acid. The similarities of 64% and 45% to Archaea and Bacteria domains were observed in the samples taken in the operating period of anaerobic FBR fed with 23.6 +/- 10mg L-1 and 27.9 +/- 10mg L-1 of LAS. During the operation stages in the reactor, Gemmatimonas, Desulfobulbus and Zoogloea were determined as the most abundant genera related to surfactant degradation using 454-Pyrosequencing. (AU)

• Processo FAPESP: 10/11531-9 - Avaliação do tratamento de água de lavanderia comercial em reator anaeróbio de leito fluidizado
• Beneficiário: Juliana Kawanishi Braga
• Modalidade de apoio: Bolsas no Brasil - Doutorado