RESISTANCE OF BIODIESEL FUEL TO MICROBIOLOGICAL CONTAMINATION
DOI:
https://doi.org/10.35546/kntu2078-4481.2024.3.3Keywords:
biodiesel, fuel, microbiological damage, microorganisms, corrosion, oxidation, wear, sustainability, environmental safety.Abstract
An assessment of the microbial degradation of biodiesel during operation and its impact on structural materials has been conducted. The search for renewable, sustainable, and environmentally friendly alternatives to petroleum diesel has led to growing interest in the production and use of biodiesel. However, due to its chemical composition, biodiesel is highly vulnerable to microbial contamination, resulting in biological degradation. This study systematically catalogs a significant variety of microorganisms found in biodiesel. It demonstrates that the main barrier to its widespread use is its high biodegradability compared to diesel fuel, along with its low resistance to microbial contamination and corrosiveness, which can significantly reduce fuel quality. It is also important to note that the concentration of biodiesel affects biochemical processes and the vitality of microorganisms. This is crucial for understanding the interaction of biodiesel with the microbial environment and the corrosion process. Experimental evidence confirms that microorganisms can actively grow and multiply in diesel fuel, undermining its stability and promoting its biodegradation, the formation of biofilms at the fuel-water interface, and the production of mechanical contaminants that clog filters and may accelerate the corrosion of technological equipment. The metabolic byproducts of microorganisms lead to changes in the pH of the fuel environment. Furthermore, the microbial degradation of hydrocarbons is accompanied by the formation of corrosion-active compounds, which inevitably leads to the destruction of structural materials and the formation of harmful compounds, resulting in wear products that decrease the efficient use of fuel. The introduction and use of biodiesel as a replacement for traditional fuel is promising, but improving its resistance to microbial contamination and susceptibility to corrosion is an urgent issue that requires direct assessment and further resolution.
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