Bioremediation of PAHs-contaminated soil through composting: Influence of bioaugmentation and biostimulation on contaminant biodegradation

Link:

https://www.sciencedirect.com/science/article/pii/S0964830511001326

Abstract:

The degradation of several polycyclic aromatic hydrocarbons (PAHs) in soil through   composting was investigated. The selected PAHs included: fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, and chrysene, with concentrations simulating a real creosote sample. The degradation of PAHs (initial concentration 1  g of total PAHs kg−1  dry soil) was assessed applying bioaugmentation with the white-rot fungi  Trametes versicolor  and biostimulation using compost of the source-selected organic fraction of municipal solid waste (OFMSW) and rabbit food as organic co-substrates. The process performance during 30 days of incubation was evaluated through different analyses including: dynamic respiration index (DRI), cumulative oxygen consumption during 5 days (AT5), enzymatic activity, and fungal biomass. These analyses demonstrated that the introduced  T.  versicolor  did not significantly enhance the degradation of PAHs. However, biostimulation was able to improve the PAHs degradation: 89% of the total PAHs were degraded by the end of the composting period (30 days) compared to the only 29.5% that was achieved by the soil indigenous microorganisms without any co-substrate (control, not amended). Indeed, the results showed that stable compost from the OFMSW has a greater potential to enhance the degradation of PAHs compared to non-stable co-substrates such as rabbit food.

Justification:

I selected this paper because it deal with Polycyclic aromatic hydrocarbons, which is the topic discussed in recent classes. The paper talks about composting as another method for contaminant degradation which I found very interesting.

Citation:

Lukić, B.,  Huguenot, D.,  Panico, A.,  van Hullebusch, E.D.,  Esposito, G., 2017. Influence of activated sewage sludge amendment on PAH removal efficiency from a naturally contaminated soil: application of the landfarming treatment.  Environmental Technology (United Kingdom), 38(23), pp. 2988-2998

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