Treatment of phenol in an anaerobic fluidized bed reactor (AFBR): continuous and batch regime |
| |
Authors: | Jose B Carbajo Karina Boltes Pedro Leton |
| |
Institution: | 1.Department of Analytical Chemistry and Chemical Engineering,University of Alcalá, Edificio de Ciencias,Alcalá de Henares,Spain |
| |
Abstract: | Results of this study describe the feasibility of anaerobic treatment of highly concentrated phenol synthetic wastewater using
an anaerobic fluidized bed reactor (AFBR) in both continuous and batch modes. Wastewater with a maximum load of 2,100 mg C·l−1 was prepared using phenol (maximum concentration of 1,600 mg C·l−1) as substrate and a mixture of acetic, propionic and butyric acids (500 mg C·l−1) as co-substrate. AFBR reached total organic carbon (TOC) and phenol removal efficiency over 95% treating the highest organic
loading rate (OLR) containing phenol studied for this kind of reactor (5.03 g C·l−1·d−1). The phenol loading rate rise caused volumetric biogas rate increase up to 4.4 l·l−1·d−1 (average yield of 0.28 l CH4·g−1 CODremoved) as well as variation in the biogas composition; the CO2 percentage increased while the CH4 percentage decreased. Morphological examination of the bioparticles at 4.10 g C·l−1·d−1, revealed significant differences in the biofilm structure, microbial colonization and bacterial morphological type development.
The five batch assays showed that phenol degradation may be favoured by the presence of volatile fatty acids (VFAs) (co-metabolism),
whereas VFAs degradation may be inhibited by phenol. AFBR reached initial phenol degradation velocity of 0.25 mg C·l−1·min−1. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|