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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