Post-treatment of the permeate of a submerged anaerobic membrane bioreactor (SAMBR) treating landfill leachate

被引:20
|
作者
Trzcinski, Antoine P. [1 ]
Ofoegbu, Nkechi [1 ]
Stuckey, David C. [1 ]
机构
[1] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn, London SW7 2BY, England
关键词
Submerged anaerobic membrane bioreactor; refractory organic substances; post-treatment; ORGANIC-MATTER; REMOVAL; COAGULATION; ADSORBENTS; ADSORPTION;
D O I
10.1080/10934529.2011.609402
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, various methods were compared to reduce the Chemical Oxygen Demand (COD) content of stabilised leachate from a Submerged Anaerobic Membrane Bioreactor (SAMBR). It was found that Powdered Activated Carbon (PAC) resulted in greater COD removals (84 %) than Granular Activated Carbon (GAC-80 %), an ultrafiltration membrane of 1kDa (75 %), coagulation-flocculation with FeCl(3) and polyelectrolyte (45 %), FeCl(3) alone (32 %), and polymeric adsorbents such as XAD7HP (46 %) and XAD4 (32 %). Results obtained on the < 1 kDa fraction showed that PAC and GAC had a similar adsorption efficiency of about 60 % COD removal, followed by XAD7HP (48 %), XAD4 (27 %) and then FeCl(3) (23 %). The post-treatment sequence UF+GAC would result in a final effluent with less than 100 mg COD/L. Size Exclusion Chromatography (SEC) revealed that the extent of adsorption of low MW compounds onto PAC was limited due to low MW hydrophilic compounds, whereas the kinetics of PAC adsorption depended mainly on the adsorption of high MW aromatics.
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页码:1539 / 1548
页数:10
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