Analysis of experimental data on the kinetic characteristics of milk whey purification using ultrafiltration elements of BTU 05/2 type

Abstract

The paper presents the results of experimental data on the kinetic characteristics of ultrafiltration tubular elements, such as the output specific flow, retention coefficient, diffusion permeability coefficient, distribution coefficient. To study the purification of milk whey, we used tubular ultrafilters BTU 05/2 with membrane material fluoroplast (F), polyethersulfone (PESF), polysulfone (PS). For theoretical calculation of the retention coefficient, output specific flux, diffusion permeability coefficient, distribution coefficient, mathematical expressions were developed and empirical coefficients were obtained. The developed mathematical expression describes the experimental data with good reliability. The obtained experimental and calculated data can be used with high reliability in calculating mass-transfer fluxes of substances through a semi-permeable membrane, as well as in engineering methods for calculating and predicting efficiency, and using membrane processes for concentrating serum. The protein concentration in real milk whey was determined by formol titration. On the basis of the studies carried out, the dependence of the growth of the output specific flow on pressure was established, that the optimal pressure for concentrating milk whey on the ultrafiltration membranes we have chosen is 0.25 MPa. For three types of ultrafilters, the experimental value of the coefficient was within 99% for protein. For the theoretical calculation of the retention coefficient, a program in the MAXIMA language was developed and registered. Due to the method of applying the membrane to the reinforcing element, the membrane material polyethersulfone (PESF) and polysulfone (PS) have a substrate, due to which they sorb more substances on themselves, because of this, the diffusion permeability coefficient and the distribution coefficient are much higher than that of a filter element with membrane made of fluoroplastic (F), which does not have a substrate.

Synthesis of tagatose and fucose from dairy raw material

“…To determine the glucose content in the solution, the ACCU-CHEK ® ACTIVE glucometer was used (measurement error ± 0.2 mmol/dm 3 ). Before testing, the device was calibrated in accordance with the attached manufacturer's instructions for standard glucose solutions [18,19].…”

Whey proteins hydrolysis using Alcalase and Flavourzyme

“…To solve this problem, the most rational ways of milk whey utilization in the food industry are being developed. Currently, research for whey processing includes three main areas: obtaining concentrates using ultrafiltration techniques, isolation of the individual components with high nutritional value, and the biological conversion of lactose and whey proteins [2,4].…”

Investigation of the structure transformation effect of ion-exchange membranes on a separation processes efficiency of technological solutions and an ecological safety of food production enterprises

“…This leads to plants degradation and deterioration of an ecological situation. Membrane methods are also used for demineralization and purification of technological solutions of dairy production, since due to their high polluting ability draining the resulting whey into drains creates problems for the environment [5,6]. Such additional processing makes it possible to organize almost waste-free production and expand the range of products produced.…”