Abstract CotA laccase was successfully expressed from Pichia pastoris . Magnetic reduced graphene oxide (MRGO) nanocomposite synthesized and functionalized with iminodiacetic acid (IDA-NH 2 ), then chelated Cu 2+ for effective immobilization His-tagged laccase. The -chelated MRGO (MRGO-IDA-Cu ) showed 175 mg/g-support adsorption capacity. of MRGO-IDA-Cu nano-hybrid composite confirmed by Raman ...

A new absorption vapor compression distillation was proposed in present research. An open absorption heat transformer has a coupled thermally evaporator and absorber. Distillation of waste water with high content of SiO 2 from heavy oil production. The waste heat of 70 C can be elevated up to 125 C and generate steam of 120 C. The waste heat is able to drive four-effect distillation to produce ...

The present work aims to investigate the effects of the addition of waste cooking oil (WCO) on heavy crude oil biodegradation and microbial enhanced oil recovery (MEOR) using Pseudomonas sp. SWP-4. Growth kinetics show Pseudomonas sp. SWP-4 had a maximum dry cell weight of 1.73 g/L and cell-surface hydrophobicity of 62.4% against n-hexadecane when degraded the crude oil with the addition of WCO...

various researches on laboratory and field scale illustrate that manipulating the ionic composition and the ion concentration of injected water can affect the efficiency of water flooding and the interaction of injected water with rock and other fluids present in porous media. the objectives of this paper are to investigate parameters that affect low salinity water flooding; mainly the effect o...

Abstract The suitable concentration of mobility-controlled oil displacement agent was selected through laboratory experiments, and the development mechanism in water flooding process studied. results show that when mobility control is 0.15 %, viscosity reduction effect best. Fluid injection pressure can be reduced by controlled agent. improve efficiency, recovery rate Tuha heavy increased from ...

The Karazhanbas Field (KBM) is a giant shallow heavy oil field in western Kazakhstan, less than 460 m depth. It contains heavy oil (μ ~400 cP) in seven reservoir zones from several to 40 m thick in unconsolidated sands with porosities 28-32%, permeabilities of ~0.5 D, and an arkosic lithology with angular grains. There is no free gas cap, and the structure is divided into fault-controlled block...