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The new concept of MIEX® resin dose categories. Swelling effect, reactor steady-state balance, and NOM removal process control

Mołczan Marek

Environment Protection Engineering

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2024

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Vol. 50, nr 1

91--103

EN

The use of powdered adsorbents for water purification has many advantages and one major drawback – lack of regeneration due to difficulty in separating powdered particles. This weakness is attempted to be broken by powdered magnetic adsorbents, in particular magnetic ion exchange resins, used to remove natural organic matter (NOM) from water. In this water treatment process, NOM removal is controlled by the adsorbent content in the reactor (adsorbent dose) and the degree of its saturation. The control over the dose and saturation is done by mutual relations between the regenerated resin stream directed to the reactor and the saturated resin stream received from the reactor. An obstacle in balancing these streams is a variable volume of the adsorbent resulting from its varied swelling, depending on the features of the solution and saturation of the adsorbent. For this reason, it was proposed to distinguish new resin dose and content categories adequate to these changes, the use of which allows full control of both streams. Thus, the reactor feed stream was associated with relative fresh resin content (RRC) and relative fresh resin dose (RRD), which indicate the volume occupied by the regenerated adsorbent in the solution of water during purification. However, the stream received from the reactor was associated with saturated resin content (SRC) and saturated resin dose (SRD), which indicate the volume occupied by saturated adsorbent in the solution of water under treatment. In turn, these two categories of contents/doses are related to the swelling degree (ηSR). Another role was assigned to the third dose category, which is absolute fresh resin dose (ARD), referring to the volume occupied by the regenerated adsorbent in the solution of demineralized water. Thanks to two key features with reference properties (demineralized water, regenerated adsorbent), ARD allows one to transfer laboratory results to practice and to compare the results of various research. The resin loss factor described by the ηLS indicator was also included in this structure.

2

Woda „DEMI” i Actiflo w Elektrowni Pątnów

Jodango M., Berger M., Pacierpnik K.

Energetyka Cieplna i Zawodowa

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2015

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Nr 6

12--16

PL

Pątnów to jedno z osiedli miasta Konina, położone w pobliżu jeziora Gosławickiego i Pątnowskiego. Elektrownia Pątnów o maksymalnej mocy 1646 MW (1200+464 MW) zlokalizowana jest nad jeziorem Gosławickim, skąd czerpie wodę do chłodzenia i napędzania turbin parowych - w tym celu używana jest para wytwarzana z wody zdemineralizowanej uzyskiwanej ze stacji demineralizacji wody.

3

Wpływ Składników Mineralnych rozpuszczonych w wodzie pitnej na organizm ludzki człowieka

Derkowska-Sitarz M., Adamczyk-Lorenc A.

Prace Naukowe Instytutu Górnictwa Politechniki Wrocławskiej. Studia i Materiały

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2008

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Vol. 123, nr 34

39-48

PL

W artykule omówiono wpływ mikro o makroskładników zawartych w wodzie przeznaczonej do spożycia na organizm ludzki oraz wpływ spożycia wody demineralizowanej na zdrowie człowieka.

EN

This paper presents the influence of micro- and macrocomponents contents in drinking waters on human organism and also influence of dcmincralized water on human health.