Anaerobic mesophilic digestion of waste activated sludge in the presence of 2,3 ',4,4 ',5-pentachlorobiphenyl


Kaya D., İMAMOĞLU İ., SANİN F. D.

INTERNATIONAL BIODETERIORATION & BIODEGRADATION, vol.83, pp.41-47, 2013 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 83
  • Publication Date: 2013
  • Doi Number: 10.1016/j.ibiod.2013.04.003
  • Title of Journal : INTERNATIONAL BIODETERIORATION & BIODEGRADATION
  • Page Numbers: pp.41-47

Abstract

The aim of this study was to investigate the anaerobic digestion of waste activated sludge in the presence of a model PCB congener, 2,3',4,4',5-pentachlorobiphenyl (PCB-118), and transformer oil (TO), and thereby PCB dechlorination under mesophilic digestion conditions. Two PCB-118 concentrations (1 and 20 mg/L) and one TO concentration (1.52 g/L) were studied. Beside the PCB concentrations, pH, ORP, TS, VS, VSS, TSS, tCOD, and sCOD were monitored throughout the reactor operations (159-day). Methane productions of PCB reactors were considerably lower than that of control reactor (R-C), indicating the negative effect of PCB on methane production. The highest COD removal, 56%, was observed in R-C, followed by 1 and 20 mg/L PCB-118 reactors (46.7% and 40.6% reduction), respectively. VS reductions were between 36 and 52%, with the lower removal in the higher PCB-118 containing reactor. About 12 and 22% PCB-118 removals were attained proportional to their initial concentrations, 1 and 20 mg/L, respectively. (C) 2013 Elsevier Ltd. All rights reserved.