Biodegradation of polycyclic aromatic hydrocarbons by an acidophilic Stenotrophomonas maltophilia strain AJH1 isolated from a mineral mining site in Saudi Arabia
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- 作者：P. Arulazhagan ; K. Al-Shekri ; Q. Huda ; J. J. Godon ; J. M. Basahi…
- 关键词：Acidophils ; Petroleum hydrocarbons ; Stenotrophomonas maltophilia ; Continuous stirred tank reactor ; Biodegradation
- 刊名：Extremophiles
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：21
- 期：1
- 页码：163-174
- 全文大小：
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Microbiology; Biotechnology; Biochemistry, general; Microbial Ecology;
- 出版者：Springer Japan
- ISSN：1433-4909
- 卷排序：21
文摘
The present study aims at analyzing the degradation of polycyclic aromatic hydrocarbons (PAHs) at acidic conditions (pH = 2) by acidophilic Stenotrophomonas maltophilia strain AJH1 (KU664513). The strain AJH1 was obtained from an enrichment culture obtained from soil samples of mining area in the presence of PAH as sole sources of carbon and energy. Strain AJH1was able to degrade low (anthracene, phenanthrene, naphthalene, fluorene) and high (pyrene, benzo(e)pyrene and benzo(k)fluoranthene) molecular weight PAHs in acidophilic mineral salt medium at pH 2, with removal rates of up to 95% (LMW PAH) and 80% (HMW PAH), respectively. In addition, strain AJH1 treated petroleum wastewater with 89 ± 1.1% COD removal under acidic condition (pH 2) in a continuously stirred reactor. Acidophilic S. maltophilia strain AJH1, hence holds the promise as an effective degrader for biological treatment of PAHs contaminated wastewater at acidic pH.