Biosurfactant-biopolymer driven microbial enhanced oil recovery (MEOR) and its optimization by an ANN-GA hybrid technique

Journal of Biotechnology
Gunaseelan DhanarajanR Sen

Abstract

A lipopeptide biosurfactant produced by marine Bacillus megaterium and a biopolymer produced by thermophilic Bacillus licheniformis were tested for their application potential in the enhanced oil recovery. The crude biosurfactant obtained after acid precipitation effectively reduced the surface tension of deionized water from 70.5 to 28.25mN/m and the interfacial tension between lube oil and water from 18.6 to 1.5mN/m at a concentration of 250mgL-1. The biosurfactant exhibited a maximum emulsification activity (E24) of 81.66% against lube oil. The lipopeptide micelles were stabilized by addition of Ca2+ions to the biosurfactant solution. The oil recovery efficiency of Ca2+conditioned lipopeptide solution from a sand-packed column was optimized by using artificial neural network (ANN) modelling coupled with genetic algorithm (GA) optimization. Three important parameters namely lipopeptide concentration, Ca2+concentration and solution pH were considered for optimization studies. In order to further improve the recovery efficiency, a water soluble biopolymer produced by Bacillus licheniformis was used as a flooding agent after biosurfactant incubation. Upon ANN-GA optimization, 45% tertiary oil recovery was achieved, when biopolym...Continue Reading

Citations

Dec 12, 2019·Extremophiles : Life Under Extreme Conditions·Júnia Schultz, Alexandre Soares Rosado
Dec 14, 2019·Recent Patents on Biotechnology·Pushpinder Sharma, Nivedita Sharma
May 1, 2021·Polymers·Sreejita GhoshRina Rani Ray
Nov 19, 2019·International Journal of Biological Macromolecules·Hadi AzarhavaSeyyed Mohammad Mousavi
Sep 2, 2021·Brazilian Journal of Biology = Revista Brasleira De Biologia·S P M CottaC A Oliveira-Paiva

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