Degradation of hexane and other recalcitrant hydrocarbons by a novel isolate, Rhodococcus sp. EH831

Abstract

The utility of the strain isolated in this study needs to be proved by its application to biological process systems, such as biofilters and bioreactors, etc., for the degradation of hexane and many other recalcitrant hydrocarbons. Detailed investigations will also be needed to clarify the enzymatic characteristics relating the degradation of both recalcitrant hydrocarbons and hexane.

Half-Life of Carcinogenic Polycyclic Aromatic Hydrocarbons in Stored Sewage Sludge

“…depends on the presence of proper microorganisms and on environmental conditions (temperature, water content, redox potential, pH, presence of oxygen) [2,4,10,12,24,27]. In the wastewater treatment plant PAHs mainly absorb onto solid particles (sewage sludge) [1,3,6,11].…”

“…In the above mentioned investigations it was proved that persistence of PAHs depends on the structure and properties of individual compounds. Additionally, it depends on type and soil properties such as pH, temperature, the content of fulvic acids, humine and water, sorption capacity, and the presence of microorganisms able to decompose PAHs [2,10,12,14,17]. The results of investigations described in the literature are not always comparable because of the heterogeneity of materials, such as sewage sludge and their different properties.…”

Stability of Selected PAHs in Sewage Sludge/ Stabilność Wybranych Wwa W Osadach Ściekowych

“…That means that the presence of microorganisms was statistically significant in the removal of these hydrocarbons. According to literature data, biodegradation of PAHs is possible but the primary adoption of the microorganisms is required [1,9]. The abiotic losses may be related to the reactions with other compounds of sewage sludges as well as sorption, photodegradation, oxidation and evaporation [2,5,10,13].…”

“…PAHs may undergo the process of degradation under certain conditions. Effectiveness of the degradation depends on the presence of proper microorganisms and environmental conditions [3,7,9,18]. In the wastewater treatment plant PAHs mainly absorb onto solid particles and accumulate in sewage sludge [1,2,4,8].…”

“…In the above mentioned investigations it was proved that persistence of PAHs depends on the structure and properties of individual compounds. Additionally, it depends on type and soil properties such as: pH, temperature, content of fulvic acids, humine and water, sorption capacity, the presence of microorganisms able to decompose PAHs [7,9,10,13]. The results of investigations described in the literature are not unambiguous and heterogeneity of sewage sludge makes difficulties in comparison with the results.…”