Influence of cosubstrates for linear anionic sulfonated alkylbenzene degradation and methane production in anaerobic batch reactors

Author(s)

Motteran, Fabricio ^[1] ; Okada, Dagoberto Yukio ^[2] ; Delforno, Tiago Palladino ^[3] ; Varesche, Maria Bernadete Amancio ^[4]

Affiliation

^[1] Univ Fed Pernambuco, Mol Biol & Environm Technol Lab, Environm Sanitat Lab, Dept Civil & Environm Engn, Ave Arquitetura S-N, Cidade Univ, BR-50740550 Recife, PE - Brazil

^[2] Univ Estadual Campinas, Sch Technol, Paschoal Marmo 1888 St, BR-13484332 Limeira, SP - Brazil

^[3] Univ Fed Sao Carlos, Ctr Human & Biol Sci, Sorocaba Campu, Joao Leme dos Santos Highway, BR-18052780 Sorocaba, SP - Brazil

^[4] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Hydraul & Sanitat, Ave Trabalhador Sao Carlene 400, BR-13566590 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: PROCESS SAFETY AND ENVIRONMENTAL PROTECTION; v. 139, p. 60-68, JUL 2020.
• Web of Science Citations: 0

Abstract

This study evaluated the influence of cosubstrates, acetate, formate, and fumarate on the anionic surfac- tant degradation (linear alkylbenzene sulfonated - LAS), using anaerobic batch reactors at 30 degrees C, 50 rpm at 25.8 +/- 0.2 mgLAS/L. Cosubstrates were tested separately for LAS degradation and methane production. Organic matter removal efficiency were 23 +/- 1.2 %, 65 +/- 2.8 %, 60 +/- 5.6 %, 59 +/- 0.8 % and 75 +/- 2.7 %, for control without LAS (67 +/- 11.9 mg/L), control with LAS (129 +/- 27.2 mg/L), reactors with acetate (172 +/- 19.8 mg/L), formate (126 +/- 13.7 mg/L) and fumarate (332 +/- 16.3 mg/L). Methane production for the experimental series was 0.072 ? 0.002 mu mol, 0.6 +/- 0.07 mu mol, 1.69 +/- 0.11 mu mol, 1.51 +/- 0.15 mu mol and 2.18 +/- 0.24 mu mol in control reactors in the absence and presence of LAS and with the acetate, formate and fumarate, respectively. Under the nutritional conditions with cosubstrates, there was a higher LAS degradation in both dissolved and adsorbed fraction in anaerobic biomass. These cosubstrates can directly assist the metabolic pathways of microorganisms for energy generation and toxic removal. Among the cosubstrates tested, fumarate favored greater LAS degradation reaching a removal efficiency of 98.3 +/- 0.8 % for 26 +/- 1.13 mg/L of surfactant and also provided higher methane production in anaerobic batch systems. (C) 2020 Published by Elsevier B.V. on behalf of Institution of Chemical Engineers. (AU)

• FAPESP's process: 10/18885-0 - DEGRADATION OF NON IONIC SURFACTANT LINEAR ALCOHOL ETHOXYLATE IN ANAEROBIC FLUIDIZED BED
• Grantee: Fabricio Motteran
• Support Opportunities: Scholarships in Brazil - Doctorate