Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants

The objects of the study were the Doy Chemical hollow-fiber ultrafiltration membranes which were use for preparation of make-up water for the Novocherkasskaya Regional Thermal Power Plant (RTPP).We tried out a possibility of applying the X-ray fluorescence spectrometry to study the condition of the...

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Main Authors: E. V. Veselovskaya, E. N. Voloshina, S. E. Lysenko
Format: Article
Language:English
Published: Kazan State Power Engineering University 2019-11-01
Series:Известия высших учебных заведений: Проблемы энергетики
Subjects:
Online Access:https://www.energyret.ru/jour/article/view/1057
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spelling doaj-9772403c75e14657bef8596bd0ae2f532021-07-28T13:16:32ZengKazan State Power Engineering UniversityИзвестия высших учебных заведений: Проблемы энергетики1998-99032019-11-01213556210.30724/1998-9903-2019-21-3-55-62589Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plantsE. V. Veselovskaya0E. N. Voloshina1S. E. Lysenko2Platov South-Russian State Polytechnic UniversityPlatov South-Russian State Polytechnic UniversityPlatov South-Russian State Polytechnic UniversityThe objects of the study were the Doy Chemical hollow-fiber ultrafiltration membranes which were use for preparation of make-up water for the Novocherkasskaya Regional Thermal Power Plant (RTPP).We tried out a possibility of applying the X-ray fluorescence spectrometry to study the condition of the spent non-recoverable ultrafiltration membranes in order to identify the causes of their irreversible destruction. The ARL Quant’X X-ray fluorescence energy dispersive spectrometer of Thermo Scientific (USA) was used in the study.Thin cuts of the Doy Chemical hollow-fiber ultrafiltration membranes were used in the experiments, which had worked for more than three years in the field conditions of the feed water of the Don River, Russia.The analysis of the obtained samples spectra allowed us to assume that the membranes were irreversibly contaminated by iron bacteria. Basing on the conclusions made during the analysis of X-ray fluorescence spectra we developed and tested in field conditions one of the optimization variants for technological pretreatment scheme. This scheme enables a significant increase in the service life of ultrafiltration membranes, even when the feed water is heavily contaminated by bacteria. Field tests of the modernized technology were carried out at Novocherkasskaya RTPP during 2016-2018 and showed a significant increase in the service life of the membrane modules. At the same time, the quality of the filtrate, productivity and pressure drops at the cascades of ultrafiltration units fully corresponded to the normative values even in conditions of deteriorated quality of the feed river water.It has been proved that aggressive regeneration of ultrafiltration membranes that have worked for a long time under the conditions of feed water having increased values of the total microbial number and high values of permanganate oxidation does not allow one to restore their initial state. In this case the main cause of ultrafiltration membranes contamination is iron, which is present in colloidal and bacterial forms in the pores and on the membranes surfaces. In the conditions of the Novocherkasskaya RTPP, in addition to timely flushing and chemical regeneration of ultrafiltration membranes, the necessity of organizing a preliminary treatment of the feed water with reagents having a prolonged bactericidal effect is accepted.https://www.energyret.ru/jour/article/view/1057thermal power plantswater pre-treatmentwater usewater regimeswater treatment unitswater desalinationultrafiltration membranesx-ray fluorescence spectrometryiron bacteriawater disinfection
collection DOAJ
language English
format Article
sources DOAJ
author E. V. Veselovskaya
E. N. Voloshina
S. E. Lysenko
spellingShingle E. V. Veselovskaya
E. N. Voloshina
S. E. Lysenko
Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
Известия высших учебных заведений: Проблемы энергетики
thermal power plants
water pre-treatment
water use
water regimes
water treatment units
water desalination
ultrafiltration membranes
x-ray fluorescence spectrometry
iron bacteria
water disinfection
author_facet E. V. Veselovskaya
E. N. Voloshina
S. E. Lysenko
author_sort E. V. Veselovskaya
title Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
title_short Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
title_full Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
title_fullStr Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
title_full_unstemmed Application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
title_sort application of x-ray fluorescence spectrometry in assesment of ultrafiltration membrane surface condition at water pre- treatment units of thermal power plants
publisher Kazan State Power Engineering University
series Известия высших учебных заведений: Проблемы энергетики
issn 1998-9903
publishDate 2019-11-01
description The objects of the study were the Doy Chemical hollow-fiber ultrafiltration membranes which were use for preparation of make-up water for the Novocherkasskaya Regional Thermal Power Plant (RTPP).We tried out a possibility of applying the X-ray fluorescence spectrometry to study the condition of the spent non-recoverable ultrafiltration membranes in order to identify the causes of their irreversible destruction. The ARL Quant’X X-ray fluorescence energy dispersive spectrometer of Thermo Scientific (USA) was used in the study.Thin cuts of the Doy Chemical hollow-fiber ultrafiltration membranes were used in the experiments, which had worked for more than three years in the field conditions of the feed water of the Don River, Russia.The analysis of the obtained samples spectra allowed us to assume that the membranes were irreversibly contaminated by iron bacteria. Basing on the conclusions made during the analysis of X-ray fluorescence spectra we developed and tested in field conditions one of the optimization variants for technological pretreatment scheme. This scheme enables a significant increase in the service life of ultrafiltration membranes, even when the feed water is heavily contaminated by bacteria. Field tests of the modernized technology were carried out at Novocherkasskaya RTPP during 2016-2018 and showed a significant increase in the service life of the membrane modules. At the same time, the quality of the filtrate, productivity and pressure drops at the cascades of ultrafiltration units fully corresponded to the normative values even in conditions of deteriorated quality of the feed river water.It has been proved that aggressive regeneration of ultrafiltration membranes that have worked for a long time under the conditions of feed water having increased values of the total microbial number and high values of permanganate oxidation does not allow one to restore their initial state. In this case the main cause of ultrafiltration membranes contamination is iron, which is present in colloidal and bacterial forms in the pores and on the membranes surfaces. In the conditions of the Novocherkasskaya RTPP, in addition to timely flushing and chemical regeneration of ultrafiltration membranes, the necessity of organizing a preliminary treatment of the feed water with reagents having a prolonged bactericidal effect is accepted.
topic thermal power plants
water pre-treatment
water use
water regimes
water treatment units
water desalination
ultrafiltration membranes
x-ray fluorescence spectrometry
iron bacteria
water disinfection
url https://www.energyret.ru/jour/article/view/1057
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AT envoloshina applicationofxrayfluorescencespectrometryinassesmentofultrafiltrationmembranesurfaceconditionatwaterpretreatmentunitsofthermalpowerplants
AT selysenko applicationofxrayfluorescencespectrometryinassesmentofultrafiltrationmembranesurfaceconditionatwaterpretreatmentunitsofthermalpowerplants
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