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Sequencing batch reactor performance treating PAH contaminated lagoon sediments

TitleSequencing batch reactor performance treating PAH contaminated lagoon sediments
Publication TypeArticolo su Rivista peer-reviewed
Year of Publication2005
AuthorsGiordano, A., Stante Loredana, Pirozzi F., Cesaro R., and Bortone G.
JournalJournal of Hazardous Materials
Volume119
Pagination159-166
ISSN03043894
KeywordsAromatic, Aromatic hydrocarbons, article, Biodegradation, biological activity, Bioreactors, carbon, carbon source, Chemical, Chemical reactors, contamination, Degradation, dredge spoil, Environmental, Experimental test, Fluid, Geologic Sediments, Hydraulic retention time (HRT), Italy, Kinetics, lagoon, Oxygen, PAH, performance assessment, polycyclic aromatic hydrocarbon, Polycyclic aromatic hydrocarbons, Polycyclic Hydrocarbons, sea pollution, sediment, sediment pollution, Sediments, Sequencing batch reactor, Sequencing batch reactors (SBR), tap water, Titration, Waste disposal, Water, Water Pollutants
Abstract

The applicability of sediment slurry sequencing batch reactors (SBR) to treat Venice lagoon sediments contaminated by polycyclic aromatic hydrocarbons (PAHs) was investigated, carrying out experimental tests. The slurry, obtained mixing tap water and contaminated sediments with 17.1 mg kg-1 TS total PAHs content, was loaded to a 8 l lab-scale completely stirred reactor, operated as a sequencing batch reactor. Oxygen uptake rate exerted by the slurry, measured by means of a DO-stat titrator, was used to monitor the in-reactor biological activity and to select the optimal operating conditions for the sediment slurry SBR. The PAHs removal efficiency was evaluated in different operating conditions, obtained changing the hydraulic retention time (HRT) of the lab-scale reactor and adding an external carbon source to the slurry. HRT values used during the experiments are 98, 70 and 35 days, whereas the carbon source was added in order to evaluate its effect on the biological activity. The results have shown a stable degradation of PAHs, with a removal efficiency close to 55%, not dependent on the addition of carbon source and the tested HRTs. © 2004 Elsevier B.V. All rights reserved.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-14844327971&doi=10.1016%2fj.jhazmat.2004.12.002&partnerID=40&md5=fb9f1cb4f43f0c6244341999fa939acd
DOI10.1016/j.jhazmat.2004.12.002
Citation KeyGiordano2005159