Microbial enhanced oil recovery (MEOR) is an economical method used to improve the oil recovery from reservoirs. In the MEOR techniques, by applying different microorganisms, a variety of products such as bioacid, biogas, biosurfactant, and biopolymer are generated, among which biosurfactant, one of the important metabolites, is produced by bacteria. It is worthy to note that bacteria are suita...

Today, efforts go towards the replacement of chemical surfactants by natural biological biosurfactants (biosurfactant), as these materials are not carcinogenic and highly compatibile with the environment. One of the main classes of biosurfactants is rhamnose containing glycolipid biosurfactant (rhamnolipids). This type of biosurfactants can be applied in many industries such as oil industry, ph...

A series of 9 lactonic lipopeptide biosurfactants was isolated from Bacillus licheniformis IM 1307 as representatives of the lichenysin group and we propose to name them lichenysins G. They were recovered from the culture medium as complex mixtures of molecules having different peptide sequences and different structures of beta-hydroxy fatty acids. Their separation was achieved by a reversed-ph...

Great emphasis has recently been given to the environmental impacts caused by chemical surfactants due to their toxicity and difficulty in being degraded in the environment [1]. Increasing environmental concerns, the advance in biotechnology and the emergence of more stringent laws have led to biosurfactants being a potential alternative to the chemical surfac‐ tants available on the market [2,...

Three bacterial strains of marine origin were isolated during a screening for biosurfactants among n-alkane degrading microorganisms. One strain-identified as Alcaligenes sp. MM1-produced a novel glucose lipid. In the case of Arthrobacter sp. EK 1 the well-known trehalose tetraester was found as major component. From another pure culture classified as Arthrobacter sp. SI 1, extracellular emulsi...

Surfactants are widely used in many areas of our life. However, synthetic surfactants have a serious negative impact on the environment. They do not decompose well and can accumulate ecosystems. Microbial biosurfactants be an alternative to surfactants. characterized by diverse structure, stable at critical temperatures, pH obtained from various renewable raw materials. Goal: analysis generaliz...

Summary Surface-active compounds (SAC) and emulsifiers, due to their ability reduce interfacial tension, are widely used in various industries. Most of the SAC today produced from non-renewable petrochemical raw materials not safe for living beings environment. Biosurfactants (BS) synthesized by microorganisms renewable materials, particular, food industry waste, they a promising alternative ch...

This research has isolated one type of halophilic bacterial strain from the salt pond Kajhu Village with code KJ-AB2. bacterium grew optimally at 10% (w/v) NaCl so it was classified as moderate bacteria. Several types bacteria are known to produce biosurfactants. Biosurfactants surface active agents that widely used in several pharmaceutical, food dan petroleum industries. The production biosur...