In this study 152 bacterial strains were isolated from the contaminated oils in the southwest of Iran. Hemolysis was used as a criterion for the primary  isolation of biosurfactant producing-bacteria. Fifty five strains had haemolytic activity , among them tweleve strains were good biosurfactant producers by measuring surface tension and emulsification activity.Two microorganism showe...

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...

This study describes the biological degradation of TNT by using induced aeration. Three plastic reactors were used. In each reactor 3 kg of soil were used. In order to increase the porosity of the soil, sawdust was added to soil. Textile wastewater treatment plant sludge was also added to soil. TNT at the concentrations of 1000 mg/kg of soil was added thereafter. Rhamnolipid biosurfactant at th...

background in recent decades, biological properties of biosurfactants, particularly glycolipids, including antimicrobial, antifungal, and anti-cellular effects have been projected in many research studies. the unique advantages of these compounds in terms of production and environment made them important as antimicrobial agents. objectives this study aims to evaluate probable antibacterial and ...

The need for cost effective and ecofriendly means of producing compounds environmental, industrial, other biotechnological applications cannot be overemphasized. Biosurfactant from microbial sources have been identified to the potential substitute chemical types. This has led continuous bioprospecting biosurfactant-producing microorganisms optimization processes high yield biosurfactant product...

background biosurfactants are surface-active compounds produced by some microorganisms. objectives in this study, we collected surface skin samples from breast of poultry (chicken, turkey, and, quail) and screened for biosurfactant-producing bacteria. we also determined the genera of cultured strains. materials and methods 33 hemolytic bacterial strains (15, 11, and 7 isolates from chicken, tur...

Background: Increasing worldwide contamination with hydrocarbons has urged environmental remediation using biological agents such as bacteria. Our goal here was to study the phylogenetic relationship of two crude oil degrader bacteria and investigation of their ability to degrade hydrocarbons. Materials and Methods: Phylogenetic relationship of isolates was determined using morphological and...

Biosurfactants are emerging molecules in the 21st century. However, their production intensification is still required for development of feasible bioprocesses. Therefore, this paper studies a new biosurfactant-producer, namely Geobacillus stearothermophilus DSM2313 during statistical optimization via response surface methodology. After analysis optimal pH = 7, glucose 50 g/L and NH4NO3 2 conce...