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Eksploatacja filtrów odżelaziających i odmanganiających. Cz.II: Budowa filtrów

Siwiec Tadeusz

Forum Eksploatatora

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2023

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Nr 1 (122)

44-50

PL

Artykuł jest kontynuacją zapoczątkowanej w poprzednich numerach tematyki. Poprzednie części dotyczyły problemów związanych z aeracją wody i z budową samych filtrów a niniejsza część obejmie analizę procesu filtracji, ściślej odżelaziania i odmanganiania z wykorzystaniem filtrów pospiesznych i związanych z tym zagadnień eksploatacyjnych. Kolejna część będzie dotyczyła warunków płukania filtrów.

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Recirculating Airlift for Aeration of Shallow Water Bodies

Tavrel Maryna, Kostenko Viktor, Bohomaz Olha, Kostenko Tetiana, Zemlianskyi Oleh, Pidhornyy Mykola

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 5

177-187

EN

The article is devoted to solving the issue of ensuring the efficient operation of aeration equipment in the conditions of shallow water bodies with an average depth of only a few meters. The article offers a technical solution for reducing the size of airlift aerators and increasing their performance by creating a recirculation movement of water inside the unit. With the help of a laboratory model, it was established that the dynamics of oxygenation of water in the pool with the help of a recirculating airlift is subject to a logarithmic dependence on the size of the flow regulator. It was possible to increase the oxygen concentration in the pool by 2.6 times within three hours as part of the simulation. The rate of water oxygenation was much higher than for a conventional airlift of the same size. The offered cost-efficient aeration unit, which uses wind flow as an energy source, can be used for fish farms and other applications.

3

Experimental Testing of Water Body Aeration Airlift Technology

Kostenko Viktor, Tavrel Maryna, Bohomaz Olha, Zavialova Olena, Kostenko Tetiana, Myhalenko Kostiantyn, Kostyrka Olesia

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 3

184--192

EN

The article is devoted to substantiation of parameters of water body aeration technology at high, as well as low, air temperatures. As a result of studies, the design of the water aerator based on a two-stage airlift has been improved. A study of its physical model has been conducted. The cost indicators of the set-up and its components have been obtained. It has been established that at various design parameters, the proposed scheme of operation allows to oxygenate water more effectively when compared to conventional design. A new type of water aerator based on two-stage airlift has been proposed. The linear dependence of the dynamics of the aerator flow rate on the supply of compressed air by the compressor, as well as the logarithmic dependence regarding the water oxygenation have been established. The indicator of effective rate, which allows for evaluating efficiency of water body oxygenation has been substantiated. The study results open the possibility of using an aerator with improved design to prevent eutrophication of water in open water and industrial reservoirs, e.g. in construction.

4

Badania intensywności natleniania w kanale przepływowym

Wróblewski A., Mitura A.

Materiały Budowlane

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2017

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nr 10

88--89

PL

Celem badań opisanych w artykule jest określenie współczynnika intensywności natlenienia wody w laboratoryjnym kanale przepływowym (z możliwością dowolnego sterowania zmianami prędkości przepływu wody) z zastosowaniem rurkowego mieszadła samozasysającego. W kanale zainstalowano aerator samozasysający, który wprowadza powietrze do przepływającej wody. Pomiary stężenia tlenu w wodzie zmierzono tlenomierzami umieszczonymi za i przed mieszadłem samozasysającym. Badania przeprowadzono dla różnej prędkości obrotowej mieszadła i różnej prędkości przepływu wody w kanale. Uzyskane wyniki badań wskazują na zasadność stosowania mieszadeł samozasysających do wprowadzania tlenu w przepływającej wodzie w kanałach o niewielkich polach przekroju przepływu.

EN

The aim of the study in the paper is to determine the intensity coefficient of water oxygenation in a laboratory flow channel (with the ability to freely control the velocity of water flow) using a self-priming tubular stirrer. A self-priming aerator, which delivers air into the flowing water is installed in the channel. Measurements of oxygen concentration in water were measured with oxygen meters placed behind and before the self-priming mixer. Tests were conducted for different agitator speed and different flow rate in the channel. The obtained results of tests indicate the necessity of using self-priming mixers to deliver oxygen in flowing water in channels with small flow cross sections.

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Kinetics of water oxygenation in pipe aerator

Kalenik M., Wichowski P., Morawski D., Chalecki M.

Infrastruktura i Ekologia Terenów Wiejskich

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2017

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nr II/2

689--700

EN

The paper presents the results of investigations of the oxygen content in oxygenated water in a co-current pipe aerator with the diameter of 200 mm, with stainless steel Białecki rings with the diameter of 12 mm, for two cases: when the air is supplied by a compressor and when it is supplied by a jet pump. The oxygen content in the oxygenated water was assayed using an LDO oxygen sensor. The investigations of water oxygenation in the aerator were carried out during technical exploitation of the Scientific Research Water Station of Warsaw University of Life Sciences. The oxygen content O2 in the oxygenated water was measured for the set air flow rate Qp equal to 50, 100 and 150 dm3 ×h-1 and water flow rate Qw equal to 10, 15 and 20 m3 ×h-1 . During the tests, the temperature T of the air supplied to the aerator was also measured. The water temperature was constant during the tests and it was equal to 12°C. The oxygen content O2 in the oxygenated water and the temperature T of the air supplied to the aerator were measured every 10 seconds. For each air flow rate Qp and water flow rate Qw being set, three measurement series were carried out and the obtained results were averaged. The researches were aimed on the determination of the influence of air and water flow rate on the oxygen content in the water oxygenated in a pipe aerator with use of a compressor and a jet pump. In the measurement range being tested, the effectiveness of water oxygenation increased with rise in the flow rate of the supplied air and decreased with rise in the flow rate of the supplied water. The effectiveness of water oxygenation was higher if obtained by means of a jet pump than of a compressor.