Ozone pre-treatment as improver of PAH removal during anaerobic digestion of urban sludge

被引：55

作者：

Bernal-Martinez, Arodi ^{[1
]}

Carrere, Helene ^{[1
]}

Patureau, Dominique ^{[1
]}

Delgenes, Jean-Philippe ^{[1
]}

机构：

[1] INRA, UR050, Lab Biotechnol Environm, F-11100 Narbonne, France

来源：

CHEMOSPHERE | 2007年 / 68卷 / 06期

关键词：

polycyclic aromatic hydrocarbons; methanisation; ozonation; sludge treatment; persistent organic pollutant;

D O I：

10.1016/j.chemosphere.2007.02.019

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Polycyclic aromatic hydrocarbons are ubiquitous persistent pollutants. They may accumulate in sludge during wastewater treatment because of their low biodegradability and their hydrophobic characteristics. Combination of ozonation and anaerobic digestion may be efficient to remove PAHs naturally present in sludge. The objective of this study was to investigate the impact of ozone pre-treatment, with and without surfactant addition, on the anaerobic degradation of 12 PAHs (from low to high molecular weight). Under anaerobic digestion without ozonation pre-treatment, the highest removals were obtained for the lightest PAHs (3-aromatic rings). Ozonation pretreatment of sludge allowed to increase biodegradability or bioavailability of each PAH, and the PAH removals were well correlated to the PAH solubility. Finally, addition of tyloxapol before sludge ozone pre-treatment had antagonist effects on PAH removal during anaerobic digestion: negative impact on anaerobic ecosystem activity and improvement of PAH bioaccessibility (particularly the PAHs with the highest octanol water partition coefficients). (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1013 / 1019

页数：7

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