Surfactant enhanced biodegradation of petroleum hydrocarbons in oily sludge.

Zhang, Xiaoxi

doi:10.24124/2010/bpgub662

Cited by 1 publication

(1 citation statement)

References 80 publications

(139 reference statements)

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“…Despite the fact that they have been widely used and usually can effectively remove petroleum hydrocarbons (TPH) from oil sludge, these technologies often have limitations in terms of high cost, and more importantly, resulting in various types of wastes and residues, leading to secondary pollution (Varjani 2017;Hu et al 2013). With the increasing awareness of environmental protection, green technologies (such as biotechnology) as an alternative to current physical and chemical methods have been given more attention recently (Hu et al 2013;Zhang et al 2020).…”

Section: Introductionmentioning

confidence: 99%

A salt-tolerant petroleum-degrading strain Pseudomonas aeruginosa SD and its remediation potential for oily sludge

Sun

Zhou²,

Zhang³

et al. 2023

Preprint

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Oily sludge as highly hazardous solid waste poses a significant threat to human beings and the environment, urging the development of efficient and cost-effective treatment technologies while the bioremediation approach through microbial degradation holds great potential. In this study, a salt-tolerant and highly efficient petroleum hydrocarbon degrading strain SD was isolated from oily sludge and identified as Pseudomonas aeruginosa by 16S rRNA gene sequencing. The growth conditions and crude oil degradation performance of strain SD were characterized; the optimum growth temperature range was 30-35 oC and the salinity tolerance was up to 8%. The strain was able to rapidly grow and reproduce with petroleum hydrocarbon as the sole carbon source, and to metabolize biosurfactant rhamnolipid, prompting emulsification and dispersion of crude oil, and further oil degradation. For the crude oil with an initial dosage of 2%, the degradation rate of petroleum hydrocarbons reached 93.5% within 60 days, indicating a high degradation efficiency. Through the bioremediation experiment of oily sludge, it was found that for oily sludge with oil content of 4.25%, the degradation rate of petroleum hydrocarbons reached 92.01% within 40 days. The results demonstrated great potential for Pseudomonas aeruginosa SD towards industrial application in bioremediation of oily sludge.

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