Kinetics of phenolic and phthalic acid esters biodegradation in membrane bioreactor (MBR) treating municipal landfill leachate

被引：30

作者：

Boonnorat, Jarungwit ^{[1
]}

Chiemchaisri, Chart ^{[1
]}

Chiemchaisri, Wilai ^{[1
]}

Yamamoto, Kazuo ^{[2
]}

机构：

[1] Kasetsart Univ, Fac Engn, Dept Environm Engn, Bangkok 10900, Thailand

[2] Univ Tokyo, Ctr Environm Sci, Tokyo 113, Japan

来源：

CHEMOSPHERE | 2016年 / 150卷

关键词：

Biodegradation rate; C/N ratio; Landfill leachate; Membrane bioreactor; Sludge age; Toxic organic pollutants; WASTE-WATER TREATMENT; SOLIDS RETENTION TIME; ACTIVATED-SLUDGE; PARACOCCUS-DENITRIFICANS; REMOVAL; PURIFICATION; DEGRADATION; HYDROXYLASE; MICROPOLLUTANTS; INHIBITION;

D O I：

10.1016/j.chemosphere.2016.02.050

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The kinetic of phenolic and phthalic acid esters (PAEs) biodegradation in membrane bioreactor (MBR) treating municipal landfill leachate was investigated. Laboratory-scale MBR was fed with mixture of fresh and stabilized landfill leachate containing carbon to nitrogen (C/N) ratio of 10, 6, 3 and operated under different solid retention time (SRT) of 90,15 and 5 d. Batch experiments using MBR sludge obtained from each steady-state operating condition revealed highest biodegradation rate constant (k) of 0.059-0.092 h(-1) of the phenolic and PAEs compounds at C/N of 6. Heterotrophic bacteria were the major group responsible for biodegradation of compounds whereas the presence of ammonia-oxidizing bacteria (AOB) helped accelerating their removals. Heterotrophic nitrifying bacteria found under high ammonia condition had an important role in enhancing the biodegradation of phenols and PAEs by releasing phenol hydroxylase (PH), esterase (EST) and phthalate dioxygenase (PDO) enzymes and the presence of AOB helped improving biodegradation of phenolic and PAEs compounds through their co-metabolism. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：639 / 649

页数：11

共 47 条

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