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Removal of phenanthrene and 4-phenylphenanthrene from wastewater in an integrated technological system.
- Source :
- Desalination & Water Treatment; Dec2012, Vol. 50 Issue 1-3, p78-86, 9p
- Publication Year :
- 2012
-
Abstract
- An integrated system, consisting of a bioreactor with a nitrifying immobilized biomass and a membrane reactor, was tested for its ability to remove two polycyclic aromatic hydrocarbons (PAHs)--phenanthrene (PHE) and 4-phenylphenanthrene (4-PPHE)--from wastewater. An almost complete removal of the selected PAHs was observed under the operational conditions applied (0.6mg PHE/l or a mixture of 0.6mg PHE/l and 0.6mg 4-PPHE/l in the influent, retention time in an aerated bioreactor of 1.5 h, transmembrane pressure of the ultrafiltration membrane 1 bar). Permeate concentration was below 2 lg PAH/l. The introduction of the PHE and an increase in organic loading (QV) from 4.9 kg chemical oxygen demand (COD)/(m³ day) to 6.7 kg COD/(m³ day) resulted in a decline in nitrification efficiency from 87.6 to 53.0%. A further increase in QV to 8.4 kg COD/(m³ day) by supplying an additional 4-PPHE induced neither ammonia oxidation nor PAH removal. The diversity of ammonia-oxidizing bacteria was not affected by operational conditions. The presence of the mixture of two PAHs induced a decline in the diversity of the total bacteria in the immobilized biomass. [ABSTRACT FROM AUTHOR]
- Subjects :
- PHENANTHRENE
WASTEWATER treatment
SEWAGE purification
BIOREACTORS
MEMBRANE reactors
Subjects
Details
- Language :
- English
- ISSN :
- 19443994
- Volume :
- 50
- Issue :
- 1-3
- Database :
- Complementary Index
- Journal :
- Desalination & Water Treatment
- Publication Type :
- Academic Journal
- Accession number :
- 87049658
- Full Text :
- https://doi.org/10.1080/19443994.2012.708546