Analysis of biological demulsification process of water-in-oil emulsion by Alcaligenes sp. S-XJ-1

Turbiscan Lab® Expert analysis of the biological demulsification of a water-in-oil emulsion by two biodemulsifiers

“…S-XJ-1 (CGMCC No. 2142) was isolated from petroleum-contaminated soil and was kept at −4 • C in an agar slant culture [18]. It was inoculated into 100 mL of nutrient broth medium (5.0 g L −1 beef extract, 10.0 g L −1 peptone, 5.0 g L −1 NaCl, pH 7.0) for enrichment for 72 h. The fermented broth (10 mL) was transferred into 100 mL of modified mineral salts medium (MMSM) for another 7 d of cultivation.…”

Demulsification capabilities of a Microbacterium species for breaking water-in-crude oil emulsions

“…Alcaligenes sp. S-XJ-1 showed demulsification activity of 81.3% for W/O emulsion within 24 h of incubation with cell concentration of 500 mg L -1 (Wen et al, 2010). In summary, Microbacterium sp.…”

“…So far, microbial demulsifiers have been commonly produced by pure cultures such as Alcaligenes sp., Corynebacterium petrophilum, Nocardia amarae, Rhodococcus aurantiacus, Mycobacterium sp., Bacillus subtilis, Torulopsis bombicola, Acinetobacter calcoaceticus, Arthrobacter sp., Micrococcus sp. (Carins et al, 1982;Cooper et al, 1982;Stewart et al, 1983;Das et al, 2001;Huang et al, 2009;Wen et al, 2010;Li et al, 2012, Long et al, 2012, and mixed bacterial culture (Kosaric and Duvanjak, 1987;Nadarajah et al, 2002) Bottom sediment and water.…”

Dehydration of emulsified lubricating oil by three fields: swirl centrifugal field, pulse electric field and vacuum temperature field

“…Nevertheless, these methods present several limitations as follows: (1) sedimentation, low demulsification efficiency; (2) centrifugation, easily causes too much loss of oil additives; (3) vacuum heating, high energy consumption; (4) filtration, limited processing ability; and (5) chemical methods, the oil can be easily polluted by the chemical demulsifier [7]. Over the recent years, several new demulsification methods have been developed, such as pulse electric field method [8], ultrasonic method [9], microwave method [10], and biological methods [11]. For emulsified lubricating oils polluted by water, the use of a single physical technique, such as vacuum heating, for rapid and efficient demulsification is difficult.…”