Abstract
A laboratory-scale study was conducted to investigate the effect of bioaugmentation (BA) and biostimulation (BS) on the remediation of oily sludge with high total petroleum hydrocarbon (TPH) content (269,000 mg/kg d.w. sludge). TPH concentration significantly decreased by 30.4% (P < 0.05) in the BS treatment after 13-week incubation, and 17.0 and 9.1% of TPH was removed in the BA and control treatments (amended with sterile water only), respectively. Aliphatic and other fractions (i.e., saturated n-alkanes and cyclic saturated alkanes) were reduced in the BS treatment, whereas no decrease in aromatic hydrocarbons occurred in any treatment. Gas chromatography–mass spectrometry analysis of aliphatic fractions showed that low-chain-length alkanes (C8–C20) were the most biodegradable fractions. The BS treatment supported fungal proliferation, with Sordariomycetes and Eurotiomycetes as the dominant classes. BS increased fungal diversity and decreased fungal abundance, and changed bacterial community structure. The findings show the potential of using BS to treat oily sludge with high TPH content.
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Funding
This work was supported by XinJiang Keli New Technology Development Co., Ltd. (K17-529102-004), Karamay Major Science and Technology Project (2018ZD003B), and National Key Research and Development Program of China (2016YFE0123800).
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Zhou, H., Huang, X., Bu, K. et al. Fungal proliferation and hydrocarbon removal during biostimulation of oily sludge with high total petroleum hydrocarbon. Environ Sci Pollut Res 26, 33192–33201 (2019). https://doi.org/10.1007/s11356-019-06432-z
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DOI: https://doi.org/10.1007/s11356-019-06432-z