Applying Reverse Osmosis/Electrodialysis to Isolate Organic Carbon from Water Samples

Josef Mitterwallner

Research output: ThesisDiploma Thesispeer-review

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Water quality issues have motivated comprehensive investigations to study character, properties and reactivity of organic constituents in water. Sophisticated characterization tools require the organic carbon in a concentrated and desalted form. The objective of this study was to optimize and apply a novel approach using reverse osmosis (RO) and electrodialysis (ED) to concentrate and desalt organic carbon from water samples. Therefore, DOC-isolates of natural organic matter (NOM) and effluent organic matter (EfOM) samples were generated and analyzed. Results were presented in DOC-mass balances. ED-membrane tests were performed to find the best-suited combination for laboratory-scale operation. Furthermore, biodegradation studies of NOM and EfOM isolates, using batch reactors, revealed the influencing factors on biodegradation of highly concentrated DOC. RO concentration showed DOC-losses of 18% for the NOM sample and 12% for the EfOM sample. DOC rejection in the subsequent ED-step was found to be 97% and 96%, respectively. The overall DOC-recovery of the system was approximately 87% in both experiments. Biodegradation studies suggested that substrat concentration may be the limiting factor controlling degradation of DOC.
Translated title of the contributionAnwendung von Umkehrosmose und Elektrodialyse zur Isolierung von organischem Kohlenstoff aus Wasserproben
Original languageEnglish
Awarding Institution
  • Montanuniversität
  • Drewes, Jörg E., Supervisor (external), External person
  • Draxler, Josef, Supervisor (internal)
Publication statusPublished - 17 Oct 2002

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