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Currently, a big problem is increasing the production of residual oil, for which so-called tertiary recovery methods are used. One common tertiary recovery method is the use of surfactants. The use of biological surfactants instead of synthetic ones can solve the problem of increasing oil production and reducing the toxic impact on the environment. To obtain biosurfactants, two strains of Bacillus mojavensis and Bacillus amyloliquefaciens were used. These strains are characterized by the ability to produce biosurf...

Surfactants play an important role in enhanced oil recovery by creating an oil-water emulsion that will be easier to recover from the reservoir. It is known that sulfatereducing bacteria (SRB) can use surfactants as a carbon source, which can increase the biological accumulation of sulfides and, accordingly, the corrosion of oil production equipment. Thus, all new surfactants used in oil production need to be pre-tested for SRB. The aim of this study was to evaluate the effect of four new groups of synthesized sur...

Many oilfields such as supergiant Romaschkinskoye oilfield in Russia contain heavy oils that are complicated to recover. In order to increase the proportion of obtained oil, methods of enhanced oil recovery are implemented, and microbial methods (MEOR) are considered as safe and efficient once. In-situ MEOR are based on stimulation of oilwell microflora that partly decomposes hydrocarbon molecules or alters oil-water interface tension. Despite oilwells are an environments with anaerobic conditions, many allochtono...

Global climate change is one of the most acute environmental problems of our time. Among the methods of capturing CO2 in industrial emissions are chemical, physical and biological. The latter are based on the use of living organisms that absorb carbon dioxide in metabolic processes, and the subsequent use or burial of their biomass or their metabolic products. One variant of organisms used to capture carbon dioxide biotechnologically are microalgae. In the present study, the efficiency to capture carbon from the e...

The anthropogenic influence on petroleum reservoirs during oil extraction leads to the emergence of new electron acceptors and donors and exogenous microorganisms. Microbial biodegradation of hydrocarbons in petroleum reservoirs leads to a change of its composition, resulting in a decrease in its cost. The identification of microorganisms capable of in-situ degradation of hydrocarbons under reservoir conditions is critical to understand the role of microbes in hydrocarbon conversion. To analyze microbial biodegrad...

Significant amount of crops yield are lost in the world constantly due to fungal pathogens that inhibit plants in the process of growth or affect harvested products. Rhamnolipids that are detergents produced by bacteria may be efficient environmental friendly alternative of chemical fungicides conventionally used to suppress pathogens. In the present study, the influence of treatment of Fusarium infected cherry tomatoes (Lycopersicon lycopersicum) plants and fruits by a rhamnolipid produced by Pseudomonas fluoresc...

It is widely known that oil production processes do not usually achieve maximum efficiency. One method of increasing production is microbial enhanced oil recovery (MEOR). MEOR methods can clean oil, increase production and clean oil-contaminated soils by not only introducing the microorganisms themselves but also the substances they produce. Among the advantages of these methods are their relative efficiency and the absence of negative impact on the environment. MEOR methods are divided into two groups the first g...

Recently, biostimulation has often been used to remediate oily wastes. The use of additional bioaugmentation to increase biostimulation efficiency is widely discussed in scientific and practical literature. In this study, three methods of bioremediation for oily waste containing 177.8 g kg-1 of hydrocarbons were used: the first one included biostimulation with 66.6 % compost (w/w) made from municipal waste, the second one combined biostimulation and one-time inoculation by hydrocarbon degrading strains, and the th...

It is well known that soil polluted with different pollutants, including oil, can naturally remediate. Primarily, the process of oil utilization starts with the degradation of saturated alkanes by microorganisms. Alkane monooxygenase is the major enzyme involved in the degradation of alkanes and it is classified into three groups, each catalyzing the degradation of n-alkanes with different chain lengths. In this study, we investigated abundance of alkane monooxygenases genes in the soil contaminated with oil durin...

Chicken meat is easy to produce, and as a result, it is a cheap and massively used source of animal protein in food. However, poultry farms produce more than 200 thousand tons of chicken manure per year, which must be treated. In the large scale farms biological treatment requires huge facilities and investments, therefore other methods are required. Among them, high-temperature drying and pyrolysis. The goal of this work was to compare the products of chicken manure treatment by means of two thermal methods - hig...

Large areas of oil contaminated soil are an urgent problem in oil producing regions, such as the Republic of Tatarstan (Russia). One of important factors of soil self-restoration is the presence of members able to decompose hydrocarbons in the microbial community. Different groups of genes are responsible for decomposing different hydrocarbon groups: for example, alkane monooxygenase gene and naphthalene dioxygenase gene are the predominant genes corresponding to first-step hydroxylases involved in the metabolism ...