Methanogenic potential of an anaerobic sludge in the presence of anionic and nonionic surfactants

Autor(es)

Motteran, Fabricio ^[1] ; Braga, Juliana Kawanishi ^[1] ; Sakamoto, Isabel Kimiko ^[1] ; Amancio Varesche, Maria Bernadete ^[1]

Afiliação do(s) autor(es)

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

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL BIODETERIORATION & BIODEGRADATION; v. 96, p. 198-204, DEC 2014.
• Citações Web of Science: 9

Resumo

The methanogenic potential of an anaerobic sludge in the presence of nonionic surfactant Alcohol Ethoxylate (AE) (GENAPOL C-100) and anionic surfactant Linear Alkylbenzene Sulfonate (LAS) from laundry wastewater was evaluated in anaerobic batch reactors. For this purpose yeast extract, sucrose, sodium bicarbonate, salt solution plus AE (7.2 0.9 mg L-1 123.4 34 mg L-1) or LAS (16.3 + 2.5 mg L-1 75.4 + 7.5 mg L-1) were used as synthetic substrate. The reactors were kept under agitation of 130 rpm at 30 1 C for 28 days. The highest concentrations of AE and LAS provided higher methane yields. The highest surfactant degradation observed was for the AE (99%), compared to LAS (71.10% 11.3). The presence of other compounds in the laundry wastewater may have impaired this degradation, but favored higher COD removal efficiencies (86.2% 2.8). High concentrations of AE influenced COD removal efficiency resulting in less COD removal. Although higher concentrations of surfactants have favored higher methane production, lower similarity indices were observed for both Domains (Archaea and Bacteria). (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 10/11531-9 - Avaliação do tratamento de água de lavanderia comercial em reator anaeróbio de leito fluidizado
• Beneficiário: Juliana Kawanishi Braga
• Linha de fomento: Bolsas no Brasil - Doutorado
• Processo FAPESP: 10/18885-0 - Degradação de surfactante não iônico linear álcool etoxilado em reator anaeróbio de leito fluidificado
• Beneficiário: Fabricio Motteran
• Linha de fomento: Bolsas no Brasil - Doutorado