Biodegradation characteristics and size fractionation of landfill leachate for integrated membrane treatment

•The biodegradability study of raw leachate was carried out using pilot MBR.•Biodegradation kinetics of organics were determined using respirometric modeling.•Size distribution of COD was measured using filter cut-off sizes from 2 to 1600nm.•The MBR performance was analyzed based on influent and eff...

Full description

Saved in:
Bibliographic Details
Published inJournal of hazardous materials Vol. 260; pp. 825 - 832
Main Authors Insel, Güçlü, Dagdar, Mina, Dogruel, Serdar, Dizge, Nadir, Ubay Cokgor, Emine, Keskinler, Bülent
Format Journal Article
LanguageEnglish
Published Kidlington Elsevier B.V 15.09.2013
Elsevier
Subjects
Online AccessGet full text

Cover

Loading…
More Information
Summary:•The biodegradability study of raw leachate was carried out using pilot MBR.•Biodegradation kinetics of organics were determined using respirometric modeling.•Size distribution of COD was measured using filter cut-off sizes from 2 to 1600nm.•The MBR performance was analyzed based on influent and effluent COD, nitrogen.•NF and RO membranes were used as post treatment to decrease the effluent parameters. The fate of organics and nitrogen during the biological treatment with MBR and subsequent membrane filtration processes (nano filtration, NF; reverse osmosis, RO) were investigated for a landfill leachate. The chemical oxygen demand (COD) and total Kjeldahl nitrogen (TKN) removal performances of membrane bioreactor (MBR) were obtained to be around 89% and 85%, respectively. The effluent COD of MBR was measured to be 1935mg/L (30kDa) which is much lower than experimentally determined soluble inert COD of 3200mg/L using 0.45μm filter. The readily and slowly biodegradable COD fractions were estimated to be 17% and 52% of raw influent COD, respectively. The respirometry based modeling test performed on raw leachate exhibited much slower degradation kinetics compared to municipal wastewater. A unique subset of model parameters was extracted from batch respirometry by using acclimated MBR sludge. The sequential ultrafiltration (UF) experiments (particle size distribution, PSD) revealed that most of the organics was below 2nm filter mesh size. In addition, NF/RO post treatment after MBR system was required to increase COD and total nitrogen (TN) removal performances up to 99%. Relatively lower salt rejection rates around 94% was obtained for RO system as a post treatment of MBR system.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2013.06.037