Abstract
The aim of the research was to substantiate the technological parameters of cream production with the sapropel extract and work out the technological scheme for its production. In this study, extract of sapropel from the Prybych deposit, emulsion base, containing corn oil, emulsifier No.1, cetylstearyl alcohol, nisin, euxyl K 100 and purified water were employed. To carry out the research, a set of methods to analyse colloidal and thermal stability was used. Rheological properties of the samples were determined. The method of microscopic analysis was carried out to analyse the stability of the emulsion system. It was proved experimentally that, when producing the cream, it is appropriate to use the phase inversion method, and the emulsification needs to be carried out at 5000 r/m for 20 min. Size and shape of the sample drops, obtained at 5000 r/m, were monodisperse and more uniform, most of which range from 2 to 3 microns that indicates the system stability. The following parameters of technological process were determined: mixing temperature conditions, speed of homogenisation and mixing time.
Highlights
The sapropel resources in Ukraine comprise approximately 74.5 million tonnes
During development of composition of the cream with sapropel extract, test samples were examined for organoleptic characteristics
The evaluation tests for colloidal and thermal stability and structural-mechanical parameters of the developed composition were performed
Summary
The sapropel resources in Ukraine comprise approximately 74.5 million tonnes. The sapropel resources in Volyn region comprise about 63 million tonnes that allows consideration of it as the largest raw material base of sapropel in Ukraine. Prybych deposit, located in Volyn region, occupies the area of 39 ha and yield 212 thousand tonnes of organic type sapropel (Leymunskii et al 2007; Booth et al 2007; Bevan and Smith 2011; Stankevica et al 2012; Zander-Ukraine 2018). The technology of sapropel extract production using the cavitation method was improved. It provides better extraction of humic and fulvic acids, since their content exceeds 20% (Strus and Polovko 2016). The occurrence of anti-inflammatory, wound healing and antibacterial effects of the extract was demonstrated (Klöcking and Helbig 2005; Strus et al 2014, 2015c)
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