Tag:microfiltration

№8|2010

ABROAD

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UDC 628.1.2:62-278

Frenkel V. S.

Membrane Technologies: Past, Present and Future (the North America as an Example)

SUMMARY

Basic tendencies in the field of development of membrane processes for water and wastewater treatment in the North America are covered. Main characteristics, basic trends and features of the use of membranes including membrane bioreactors are presented. Characteristics necessary for assessment and selection of the best membrane technologies for each certain project are compared. Membrane treatment has become the fastest growing sector in water treatment, wastewater treatment and water desalination. Four types of membranes are used according to membrane pore size: microfiltration (MF), ultrafiltration (UF), nanofiltration (NF) and reverse osmosis (RO). All four principal types of membrane guarantee the removal of the entire spectrum of water pollutants and can be used as a stand-alone technology for a majority of applications. Integrated membrane processes combining different membrane types are becoming a cutting edge approach to meet strict water/wastewater quality regulations because they allow the smallest possible system size, minimize chemical consumption, and provide the most cost-effective solution for the greatest number of applications.

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№8|2020

DRINKING WATER SUPPLY

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UDC 628.16

Ulchenko V. M., Tat’ianko Nataliia, Glinka Nikolai

Common problems at water treatment facilities and ways to address them

Summary

Due to the anthropogenic factors, the quality of surface water is subject to rapid, mainly negative, changes; therefore, water treatment plants not always can meet the standards of the drinking water quality. Currently, many water treatment facilities are in need of upgrade, re-technologization and even reconstruction. In addition, significant changes in the actual water supply by the water facilities (decreasing, as a rule) do not always produce a positive effect on the technical and economic indicators of the water treatment facilities. Problems arising during the operation of the water treatment facilities at all stages of surface water purification – microfiltration, chemical treatment, mixing with chemicals and flocculation, sedimentation, filtration and wash water treatment are summarized. The methods used by MY PROJECT JSC in its projects to address such problems as the lack of the treatment efficacy, overspending of chemicals, short filter cycle, large water losses for process needs, discharge of untreated wash water, high purification cost are considered.

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№8|2014

DRINKING WATER SUPPLY

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UDC 628.16.067.1:66.081.63

Strelkov A. K., Baranov A. V., Tsabilev O. V., Efanov I. A.

Evaluating the efficiency of hollow fiber membrane use in wash water treatment

Summary

Urban development dictates the necessity of increasing the output of water treatment facilities which requires the maximum operation of all the pumping filtration stations. In this respect reusing treated wash water for utility and drinking purposes will provide for eliminating water shortage and reducing environmental pressure on water bodies. The task of increasing the capacity of pumping filtration station No. 2 in Samara is very urgent. River water purification is carried out following the single-stage scheme in contact clarifiers. In view of the specific features of the clarification process such scheme does not allow increasing the station capacity by optimization of filtering media selection. The use of baromembrane processes – microfiltration and ultrafiltration – can be an alternative that will provide for the sustainable parame­ters of the treatment quality. These methods find fairly wide use in river water treatment at small-scale facilities either as independent processes or as part of comprehensive process solutions. The process of wash water of pumping filtration station No. 2 purification that operated according to the single-stage flow scheme with the use of hollow fiber membrane was studied. The main trends and possibilities of retrofitting the new process flow scheme were considered. The results of preliminary testing a pilot unit on the basis of the hollow fiber membrane element are given. The evaluation of the received filtrate quality proves its possible use for utility and drinking purposes. The membrane unit concentrate in significantly less amount can be discharged to the wastewater treatment facilities or processed to separate and dewater the sludge.

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№9|2020

DRINKING WATER SUPPLY

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UDC 628.16:62-278

Vergunov A. I.

Removal of organic compounds from natural water
in a biosorption-membrane unit

Summary

The results of experimental studies on the purification of natural water of the Don River in a biosorption-membrane reactor equipped with flat-plate microfiltration membranes are presented. The research aimed at investigating the efficiency of the biosorption-membrane reactor operating with natural water with the subsequent determination of the kinetic characteristics of the running biosorption process. As a result of processing the experimental results, the efficiency of removing not only the turbidity and color of water, but also organic substances that caused high permanganate index and COD, was specified. The temperature constant was determined that provided for calculating the specific rate of oxidation of organic pollutants for the winter and summer seasons of the year. Using the obtained constants, it is possible to perform a design calculation of a biosorption-membrane reactor to any degree of purification required.

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№07|2015

DRINKING WATER SUPPLY

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UDC 628.321

Gaid Kader, Sauvignet Philippe, Buisson Hervé

The combination Actiflo – MF/UF membrane:  an efficient solution for surface waters

Summary

Process schemes of surface water treatment with membrane filtration in most cases at the final stage require advanced clarification technologies that provide for efficient removing color and high concentrations of organic and suspended solids from raw water. Therefore, «Actiflo® – ultra- and microfiltration» process scheme is the optimal solution for drinking water purification. The results of pilot tests of «Actiflo® – ultra- and microfiltration» process scheme are presented. The experience of operating the plants using this scheme is generalized.

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№1|2012

DRINKING WATER SUPPLY

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UDC 628.16.081:628.191:576.8

DUDKIN E. V., Samsonova S. P.

Microfiltration removal of phyto- and zooplankton

Summary

The results of pilot testing DynaDisc microfiltration system manufactured by Nordik Water Produkts AB for capturing phyto- and zooplankton are presented. The tests were carried out at the treatment facilities of Volzhsky and Izhevsk water and wastewater companies by the experts from Ionoobmennye tekhnologee CJSC. The data on the efficiency of using microfiltration during water reservoir blossoming that results in reduced rapid filter loading and water quality improvement are presented.

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vstmag engfree 200x100 2

Баннер конференции для ВСТ 3

Wasma23 200x100 stand

myproject msk ru

Российская ассоциация водоснабжения и водоотведения

souz ingenerov 02