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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The contribution of selected organic substrates to the anaerobic cometabolism of sulfamethazine

Full text
Author(s):
Oliveira, Bruna M. [1] ; Zaiat, Marcelo [1] ; Oliveira, Guilherme H. D. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Sch Engn, Ctr Res Dev & Innovat Environm Engn, Lab Biol Proc, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMIN; v. 54, n. 4, p. 263-270, APR 3 2019.
Web of Science Citations: 0
Abstract

Biodegradation of organic micropollutants is likely to occur due to cometabolism by particular microbial groups. In an effort to identify the stages of anaerobic digestion potentially involved in the biodegradation of the veterinary antimicrobial sulfamethazine (SMZ), the influence of selected carbon sources (sucrose, glucose, fructose, ethanol, meat extract, cellulose, soluble starch, soy oil, acetic acid, propionic acid and butyric acid) on SMZ removal by anaerobic sludge was evaluated in short-term batch experiments. Adsorption to the granular sludge constituted a significant removal mechanism, accounting for 39% of SMZ removal in control experiments. The presence of glucose, fructose, sucrose and meat extract exerted an inducing effect on SMZ degradation, resulting in removal efficiencies of 54, 53, 58 and 61%, respectively, indicating the occurrence of cometabolism. Time courses of sucrose and meat extract degradation revealed markedly distinct organic acid profiles but resulted in similar SMZ removals. Temporal profiles of acetic and propionic acid degradation were not associated with SMZ removal, as changes in SMZ concentration were observed even after the organic acids had been completely removed. The experimental results suggest that SMZ cometabolism is not associated to sucrose hydrolysis, acetoclastic methanogenesis and acetogenesis from propionic acid. (AU)

FAPESP's process: 12/18942-0 - Sulfamethazine removal in anaerobic reactors treating swine wastewater
Grantee:Guilherme Henrique Duarte de Oliveira
Support Opportunities: Scholarships in Brazil - Doctorate (Direct)
FAPESP's process: 09/53850-6 - Acquisition of a mass spectrometer forin-depth studies of the mechanisms of degradation of organic compounds in reactors applied to wastewater treatment and to the production of bioactive commercial compounds
Grantee:Marcelo Zaiat
Support Opportunities: Multi-user Equipment Program
FAPESP's process: 09/15984-0 - Bioenergy production from wastewaters and environmental fitting of liquid and solid wastes generated
Grantee:Marcelo Zaiat
Support Opportunities: Research Projects - Thematic Grants