| Title: | Effects of the cometabolite/growth substrate ratio on the aerobic degradation of 4-monochlorophenol |
| Author(s): | Milia S; Cappai G; De Gioannis G; Carucci A; |
| Address: | "University of Cagliari, Department of Geoengineering and Environmental Technologies (DIGITA), piazza d'Armi 1, 09123, Cagliari, Italy. smilia@unica.it" |
| ISSN/ISBN: | 0273-1223 (Print) 0273-1223 (Linking) |
| Abstract: | "Chlorinated phenolic compounds like 4-monochlorophenol (4CP) are characterized by high toxicity even at relatively low concentrations and by strong persistency in both water and soils. Since cometabolism was proved to enhance 4CP biological removal, a conventional Sequencing Batch Reactor (SBR) was used in this study for the cometabolic aerobic degradation of 4CP at different influent concentrations and volumetric organic loading rates (40-50 mg/L and 0.129-0.323 kgCOD-4CP/m3.d, respectively), with sodium acetate (NaAc) as the growth substrate. The effects of different 4CP/NaAc ratios on SBR performances were evaluated in terms of 4CP removal efficiencies and maximum specific removal rates in order to maximize reactor performances: a decrease in NaAc dosage as external growth substrate would lead to definitely lower operating costs. A positive correlation was observed between 4CP maximum specific removal rates and the applied 4CP/NaAc ratios, thus making further reduction in NaAc dosage possible" |
| Keywords: | "Aerobiosis/drug effects Bacteria/drug effects/*growth & development/*metabolism Biodegradation, Environmental/drug effects Bioreactors/microbiology Chlorophenols/*isolation & purification Sodium Acetate/pharmacology Volatilization/drug effects;" |
| Notes: | "MedlineMilia, S Cappai, G De Gioannis, G Carucci, A eng England 2011/01/22 Water Sci Technol. 2011; 63(2):311-7. doi: 10.2166/wst.2011.055" |
