Removal kinetics of sulfamethazine and its transformation products formed during treatment using a horizontal flow-anaerobic immobilized biomass bioreactor

Author(s)

Oliveira, Cristiane Arruda ^[1] ; Penteado, Eduardo D. ^{[1, 2]} ; Tomita, Ines N. ^[3] ; Santos-Neto, Alvaro J. ^[3] ; Zaiat, Marcelo ^[1] ; da Silva, Bianca Ferreira ^[4] ; Lima Gomes, Paulo Clairmont F. ^[4]

Affiliation

^[1] Univ Sao Paulo, Sao Carlos Sch Engn EESC, Biol Processes Lab, Ctr Res Dev & Innovat Environm Engn, Environm Engn Bloco 4-F, Av Joao Dagnone, BR-13563120 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Paulo, Marine Dept, Campus Baixada Santista, BR-11070100 Encruzilhada, Santos - Brazil

^[3] Univ Sao Paulo, Sao Carlos Inst Chem, Postal Code 780, BR-13560970 Sao Carlos, SP - Brazil

^[4] Sao Paulo State Univ UNESP, Inst Chem, Dept Analyt Chem, POB 355, BR-14800060 Araraquara, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF HAZARDOUS MATERIALS; v. 365, p. 34-43, MAR 5 2019.
• Web of Science Citations: 4

Abstract

Sulfamethazine (SMZ) is an antibiotic from sulfonamides class widely used in veterinary medicine and reported in wastewater and sewage. Thus, it is essential to study technologies to reduce SMZ present in the aquatic environment. Anaerobic bioreactors are a low-cost technology applied for wastewater treatment. The objective of this paper is to study kinetics parameters related to SMZ removal using a horizontal flow-anaerobic immobilized biomass reactor (HAIR) and to evaluate its transformation products formed during this treatment. The bioreactor was operated at mesophilic condition with a hydraulic retention time of 12 h. The removal of SMZ was evaluated at three different concentrations: 200 ng L-1 (phase I), 400 ng L-1 (phase II) and 600 ng L-1 (phase III). The apparent first-order removal constant obtained for chemical oxygen demand was 0.885 +/- 0.094 h(-1) while SMZ showed a removal constant of 0.356 h(-1). SMZ was removed with an efficiency of 56.0 +/- 13.0 % (phase I); 62.0 +/- 12.0 % (phase II) and 62.0 +/- 6.00 % (phase III). Seven transformation products were detected and one of these with m/z 233 is reported for the first-time. The HAIB bioreactor has a potential to assist in wastewater treatment to remove contaminants at ng L-1 concentration level. (AU)

• 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
• FAPESP's process: 12/07153-4 - Analysis and identification of degradation products of antibiotics after treatment in anaerobic reactors
• Grantee: Paulo Clairmont Feitosa de Lima Gomes
• Support Opportunities: Scholarships in Brazil - Post-Doctoral