Tag:filter bed

№11|2016

DRINKING WATER SUPPLY

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UDC 628.16.067.3

Filatov A. I.

Method of maintaining the steady grain-size composition of rapid filter media

Summary

During the operation of rapid filters the grains of the filter media inevitably wear off and disintegrate which affects adversely the output of the filtration plants. To restore the design grain-size composition of the filter media the upper reduced in size layer is usually removed. This process is fairly labor-intensive and economically unjustified. The consistency of the grain-size composition of rapid filter media can be maintained eliminating labor-intensive processes of manual removal of fine grains and media unloading and rescreening. A method of maintaining the steady grain-size composition directly in the filter by intermittent washing with preestimated stabilization rate is suggested. The formulae for calculating the rate and process stages of stabilization wash are presented.

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№7|2020

ПИТЬЕВОЕ ВОДОСНАБЖЕНИЕ

DOI 10.35776/MNP.2020.07.04
УДК 628.196

Клебеко П. А., Романовский В. И.

Модифицированные антрациты – эффективные каталитические материалы для обезжелезивания подземных вод

Аннотация

Приведены результаты исследования модифицированного антрацита, который может быть использован в водоподготовке для обезжелезивания подземных вод в качестве одного из наиболее перспективных фильтрующих материалов. Гранулы антрацита покрывали оксидами железа методом экзотермического горения в растворах в муфельной печи. В качестве прекурсора железа использовали железосодержащий осадок водоочистных сооружений. Исследовано влияние четырех различных восстанавливающих реагентов на поверхностно-фазовый состав и свойства модифицированных материалов. С использованием метода экзотермического горения в растворах гранулы антрацита были модифицированы с образованием на их поверхности тонкодисперсных и кристаллических структур оксидов железа. Это оказало положительное влияние на каталитическую способность материала к обезжелезиванию подземных вод. Исследованы каталитические свойства полученных образцов и эффективность обезжелезивания подземных вод.

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№8|2017

DRINKING WATER SUPPLY

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UDC 628.16.067.3

Filatov A. I.

Review of the trends of rapid filtration improvement:
designs, technologies, calculation methods

Summary

The results of the works carried out at Rostov Research Institute of Public Utilities for the period of 1980–2016 on improving the design, calculation methods and technologies of rapid filtration are presented. The works were mainly relevant to two basic elements of rapid filters: drainage-distribution systems and filtering media as well as improvement of water coagulation processes. The obtained results were published elsewhere during 1983–2016 and found practical use at many filtration plants in Russia. More than 120 years of practice of using rapid filters in municipal water supply as well as the results of numerous studies show that from the reliability and durability standpoint quartz sand filter media is the most stable in relation to the basic indicators (including wear capacity and grinda­bility). Using this media in combination with advanced coagulants and flocculants provides for stable high quality filtrate. Another very important element of a rapid filter is the drainage-distribution system designed for reliable regeneration of the filtering media. One of the advanced types is porous drainage developed by the experts of Rostov NII AKKH: porous polymer concrete drainage on the basis of epoxy bonding agents and tubular-porous drainage with fixed porous layer. The reliability of these drainages has been proved by 20-year practice of field work. The core results of the described work are presented to help using them by the employees of engineering companies, water providers and students studying municipal drinking water supply.

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№11|2010

POTABLE WATER SUPPLY

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UDC 628.16.067.1.004.1

Ulchenko V. M., Tregub Yu. A., Vilkova E. Kh., Ostroushko Yu. V.

Experience in Operation of Ecopolymer Drainage-Distribution Systems at the WesternFiltration Station Luganskvoda

Summary

Results of the operation of Ecopolymerdrainage-distribution systems in rapid filters of water treatment facilities are presented. In the course of operation of filters with media, small sand fractions are concentrated gradually in the upper layer leading to rapid reduction in filtration rate in the beginning of a filtration cycle. After the upper layer of filtration material has been removed the main process operational parameters became normal. It is shown that the necessity of removing the upper layer of filtration material can be evaluated according to the character of the curve of fluctuations of a maximum filtration rate. The filter material preparation technique for filters with water washing equipped with the Ecopolymer drainage-distribution systems is given. The research shows that they ensure a high evenness of washing and filtrate collection along the whole filter surface without any supporting layers, and their operation characteristics are higher than of fissure drainage that makes it possible to use sand of required granulometric composition.

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№9|2012

DESIGN ENGINEERING

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UDC 628.3.001.2

Ponomarev V. G., Oulanovsky Ya. B., Korolyov M. A.

Designing wastewater treatment facilities

Summary

An approach to the selection of industrial wastewater treatment technologies and design calculations is considered. The authors analyzed the advanced design solutions with specifying their drawbacks and mistakes often made. The process solutions used in installations made by Stroyengineering LLC and practically approved during the onsite operation are described.

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