Ion exchange for natural organic matter removal
Vasileva, Anna (2014)
Metropolia Ammattikorkeakoulu
2014
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2014052710299
https://urn.fi/URN:NBN:fi:amk-2014052710299
Tiivistelmä
The purpose of this thesis was to evaluate the efficiency of different types of ion exchange resins in terms of natural organic matter (NOM) removal from drinking water.
The experimental part of this project was done at the facilities of the University of British Columbia, Vancouver, Canada. The project is a part of comprehensive study of IEX resin for NOM removal conducted at the Engineering and Biological Department of the University.
Several experiments on resin saturation and regeneration were performed. The multiple loading tests were conducted for resin saturation. Seven loadings were applied to saturate the resin, which was equivalent to 700 bed volumes. During experiments samples were taken and analyzed for NOM residuals with a by spectrophotometer and a TOC analyzer.
A strong basic resin and a weak basic resin were compared in terms of performance. Both resins were compared in two different forms: OH- and Cl-. Of the four resins the strong basic resin in Cl- form showed the most consistent percentage of NOM removal from the samples; moreover, it showed the highest percent of removal at the point of 700 BV. The result of the strong basic resin regeneration experiments showed higher productivity of Cl-form resin than OH-form resin, although among the weak basic resins the resin in OH-form was more productive than the resin in Cl-form.
The findings of this thesis can be applied to producing a pilot-scale installation. Further research is needed to evaluate the resin performance in larger scale.
The experimental part of this project was done at the facilities of the University of British Columbia, Vancouver, Canada. The project is a part of comprehensive study of IEX resin for NOM removal conducted at the Engineering and Biological Department of the University.
Several experiments on resin saturation and regeneration were performed. The multiple loading tests were conducted for resin saturation. Seven loadings were applied to saturate the resin, which was equivalent to 700 bed volumes. During experiments samples were taken and analyzed for NOM residuals with a by spectrophotometer and a TOC analyzer.
A strong basic resin and a weak basic resin were compared in terms of performance. Both resins were compared in two different forms: OH- and Cl-. Of the four resins the strong basic resin in Cl- form showed the most consistent percentage of NOM removal from the samples; moreover, it showed the highest percent of removal at the point of 700 BV. The result of the strong basic resin regeneration experiments showed higher productivity of Cl-form resin than OH-form resin, although among the weak basic resins the resin in OH-form was more productive than the resin in Cl-form.
The findings of this thesis can be applied to producing a pilot-scale installation. Further research is needed to evaluate the resin performance in larger scale.