In this study, methods for intensifying micro- and ultrafiltration processes by controlling the concentration-polarization effect are considered and studied. The negative effect of concentration polarization on the process of separation of the filtered liquid and on the membrane surface is described (due to the increase in concentration, the selectivity and specific productivity of the membrane surface decrease). The physical picture of the flowing phenomena in a flat membrane channel with known geometric dimensions is considered, four sections with different effects on the filtration process are identified. The equation of material balance is analyzed by introducing boundary conditions into the criterion equation of material balance, with the aim of finding opportunities for mass transfer. It is revealed that the mass transfer coefficient km decreases, due to the growth of the thickness of the boundary layer. The main parameters significantly influencing the process of microfiltration are the flow rates G of the initial solution, the mass transfer coefficient km, and with decreasing km decreases and G. The analysis of theoretical and experimental data is carried out showing that the decisive role in the course of the microfiltration process is played by the motion regime of the initial solution, Physical-chemical properties, geometry of the membrane channel. The prospects for using the pulsating field in bioreactors and the need for a conceptual approach for the development of promising membrane devices are grounded. The need to create membranes of complex geometric shapes with the possibility of placing turbulent devices in them and the possibility of moving them relative to each other is considered, creating channels of variable cross-section, which will lead to the appearance of a sufficient number of possibilities for creating hydrodynamic instabilities of various intensities. The article touches upon the application of pulsation regimes of destruction or loosening of the polarization layer by means of reciprocating motion of the concentrate, periodic membrane regeneration by tangential pulsating flow or by using reverse pumping.

membrane apparatus, conceptual approach, concentration polarization, pulsating field

1. Semenov A. G., Lobasenko B. A. Intensifikatsiya ul'trafil'tratsionnogo kontsentrirovaniya syvorotochnykh belkov v ustanovkakh s keramicheskimi membranami Molochnaya industriya mira i Rossiiskoi Federatsii: materialy Mezhdunar. nauch.prakt. konf. [Intensification of ultrafiltration concentrating of whey proteins in plants with ceramic membranes]. Moscow. 2013. pp. 123–125. (in Russian).

2. Timofeev A. E., Lobasenko B. A., Kotlyarov R. V. Development of mathematical model of process of membrane concentration on the basis of transfer functions. Tekhnika i tekhnologiya pishchevykh proizvodstv [Technique and technology of food production]. 2013. no. 1. pp. 1–5. (in Russian).

3. Chakraborty D., Sarkar D., Bhattacharjee C. Modeling and simulation of rotating disk-membrane module in ultrafiltration of bovine serum albumin. Separation science and technology. 2013. no. 17. pp. 2549–2566.

4. Shushpannikov A. S., Lobasenko B. A., Kotlyarov R. V. The study of the design and operating parameters of the ultrafiltration apparatus for the concentration of skim milk. Tekhnika i tekhnologiya pishchevykh proizvodstv [Technique and technology of food production]. 2013. no. 3. pp. 85–89. (in Russian).

5. Stefankin A. E., Krokhalev A. A., Kotlyarov R. V., Kriger O. V., Dengra, J. P., Ivanets V. N. Selection of parameters for hydrodynamic insertion of a membrane unit for processing the blood of farm animals. Tekhnika i tekhnologiya pishchevykh proizvodstv [Technique and technology of food production]. 2014. no. 4. pp. 106–112. (in Russian).

6. Lobasenko B. A., Ivanets V. N., Sazonova E. K., Stefankin A. E., Kotlyarov R. V. Modelling of membrane units for continuous deistvuyuschih machines with a drain diffusion layer. Tekhnika i tekhnologiya pishchevykh proizvodstv [Technique and technology of food production]. 2016. vol. 42. no. 3. pp. 112–117. (in Russian).

7. Lobasenko B. A., Semenov A. G., Zakharov Yu. N. Ul'trafil'tratsiya: Teoriya i praktika [Ultrafiltration: Theory and practice]. Novosibirsk. Nauka. 2015. 204 p. (in Russian).

8. Klyuchnikov A. I., Ponomarev A. N., Polyanskii K. K. Analysis of concentration polarization in the process of microfiltration of beer. Vestnik TGU [Proceedings of TGU]. 2012. vol. 17. no. 2. pp. 1–4. (in Russian).

9. Klyuchnikov A. I. Improving the efficiency of membrane processes using tubular ceramic membranes. Materialy LII otchetnoi nauchnoi konferentsii za 2013 god: V 3 ch. Ch. 2. [LII the reporting materials scientific conference 2013: in 3 parts. Part 2] Voronezh. VSUET. 2013. pp. 15. (in Russian).

10. Bekker V. F. Modelirovanie khimiko-tekhnologicheskikh ob"ektov upravleniya. [Modeling of chemical-technological objects of management]. Moscow. RIOR: INFRAM-M 2014. 142 p. (in Russian).