Remarkable Antiagglomeration Effect of a Yeast Biosurfactant, Diacylmannosylerythritol, on Ice‐Water Slurry for Cold Thermal Storage

Abstract

Antiagglomeration effects of different surfactants on ice slurry formation were examined to improve the efficiency of an ice-water slurry system to be used for cold thermal storage. Among the chemical surfactants tested, a nonionic surfactant, poly(oxyethylene) sorbitan dioleate, was found to show a greater antiagglomeration effect on the slurry than anionic, cationic, or amphoteric surfactants. More interestingly, diacylmannosylerythritol, a glycolipid biosurfactant produced by a yeast strain of Candida antarctica, exhibited a remarkable effect on the slurry, attaining a high ice packing factor (35%) for 8 h at a biosurfactant concentration of 10 mg/L. These nonionic glycolipid surfactants are likely to effectively adsorb on the ice surface in a highly regulated manner to suppress the agglomeration or growth of the ice particles. This is the first report on the utilization of biosurfactant for thermal energy storage, which may significantly expand the commercial applications of the highly environmentally friendly slurry system.

Mannosylerythritol lipids: a review

“…They can be used in the treatment of schizophrenia or diseases caused by dopamine metabolic dysfunction [67,72] and microbial infections [37]. MELs are used in the puriWcation of lectins (Immunoglobulin G) [9,15,16,21,39] and in the preparation of ice-slurry as an antiagglomeration agent [41,42]. Self-assembling properties [17-20, 39, 43, 70] of MELs are of recent interest because this behavior could be leveraged in gene transfection and drug delivery [23,24,42,43,65,66].…”

“…BSs form complex (chelate) with heavy metals including Cd 2+ , Pb 2+ , Zn 2+ and Hg 2+ and hence reduce their toxicity [13,52,58]. They act as carbon and energy storage molecules and remain as a protective layer for the microorganisms against the environment with high ionic strength [41,42,58]. BSs may be the byproducts released in response to the environmental changes and may have a role in DNA transfer in natural environment, since they can enhance gene uptake via transfection [13,23,24,58,61].…”

Mannosylerythritol Lipids: Microbial Production and Their Applications

“…They can be used in the treatment of schizophrenia or diseases caused by dopamine metabolic dysfunction (Vertesy et al 2002;Zhao et al 2000) and microbial infections (Kitamoto et al 1993b). MELs are used in the purification of lectins (Immunoglobulin G) (Kitamoto et al 2000;Im et al 2001Im et al , 2003Imura et al 2007b;) and in the preparation of ice-slurry, as an antiagglomeration agent (Kitamoto et al 2001b(Kitamoto et al , 2002. In addition, MEL-A, acetylated at C-4 and/or C-6, markedly increases the efficiency of gene transfection mediated by cationic liposomes (Inoh et al 2001(Inoh et al , 2004.…”

“…MEL at low concentration (10 mg/L) gets adsorbed on the ice surface and suppresses this agglomeration process. Their effective performance has also been tested successfully in a large-scale model (300 L) (Inaba 2000;Kitamoto et al 2000Kitamoto et al , 2001b.…”

Chemistry and Biod iversity of the Biologically Active Natural Glycosides

“…They also induce cell differentiation in the human leukemia cells [40], rat pheochromocytoma cells [42], and mouse melanoma cells [43]. In addition, it was recently demonstrated that MEL act as potential anti-agglomeration agents in an ice-water slurry system to be used for cold thermal storage [44]. Alkanes ranging from C 12 to C 18 were converted into glycolipid biosurfactants 34 ± 36 by resting cells of Pseudozyma (Candida) antarctica T-34 [45].…”