Microbial population in an aerated thermophilic reactor that treats recycled cardboard plant wastewater

Author(s)

Pozzi, Eloisa ^[1] ; Megda, Claudia Regina ^[1] ; Caldas, Victor E. A. ^[2] ; Damianovic, Marcia ^[1] ; Pires, Eduardo Cleto ^[1]

Affiliation

^[1] Univ Sao Paulo, Engn Sch Sao Carlos, Dept Hydraul & Sanit Engn, Av Trabalhador Saocarlense 400, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Sao Paulo, Inst Phys Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF WATER PROCESS ENGINEERING; v. 4, p. 74-81, DEC 2014.
• Web of Science Citations: 2

Abstract

Aerated thermophilic reactors may have advantages for treating industrial effluents discharged at high temperatures. In this study, the wastewater from a recycled packaging cardboard plant was treated at 55 degrees C in a moving bed aerated reactor. It was observed that, although the overall dissolved oxygen was maintained at 23 mg L-1, several anaerobic microorganisms are found either in the mixed liquor or in the attached biofilm. This result indicates that both aerobic and anaerobic mechanisms participate in pollutant removal in this reactor, which confers advantages when recalcitrant compounds are found. The median COD removal efficiency of 84% for 36 h of HRT observed in this experiment is expected for non-optimized activated sludge treatment of high temperatures industrial wastewater. (C) 2014 Elsevier Ltd. All rights reserved. (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