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Ozonation and wet oxidation in the treatment of thermomechanical pulp (TMP) circulation waters

1999; Pergamon Press; Volume: 40; Issue: 11-12 Linguagem: Inglês

10.1016/s0273-1223(99)00700-3

1996-9732

Арто Лаари, Susanna Korhonen, Tuula Tuhkanen, S. Verenich, J. Kallas,

Advanced oxidation water treatment

Research Article| December 01 1999 Ozonation and Wet Oxidation in the Treatment of Thermomechanical Pulp (TMP) Circulation Waters A. Laari; A. Laari *Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, Finland Search for other works by this author on: This Site PubMed Google Scholar S. Korhonen; S. Korhonen **Mikkeli Polytechnic, School of Engineering, P.O. Box 181, 50101 Mikkeli, Finland Search for other works by this author on: This Site PubMed Google Scholar T. Tuhkanen; T. Tuhkanen ***Tampere University of Technology, P.O. Box 541, 33101 Tampere, Finland Search for other works by this author on: This Site PubMed Google Scholar S. Verenich; S. Verenich *Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, Finland Search for other works by this author on: This Site PubMed Google Scholar J. Kallas J. Kallas *Lappeenranta University of Technology, P.O. Box 20, 53851 Lappeenranta, Finland Search for other works by this author on: This Site PubMed Google Scholar Water Sci Technol (1999) 40 (11-12): 51–58. https://doi.org/10.2166/wst.1999.0694 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Cite Icon Cite Permissions Search Site Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentAll JournalsThis Journal Search Advanced Search Citation A. Laari, S. Korhonen, T. Tuhkanen, S. Verenich, J. Kallas; Ozonation and Wet Oxidation in the Treatment of Thermomechanical Pulp (TMP) Circulation Waters. Water Sci Technol 1 December 1999; 40 (11-12): 51–58. doi: https://doi.org/10.2166/wst.1999.0694 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex Ozonation and wet oxidation were studied as means of the treatment of thermomechanical pulp (TMP) processing waters. There were two objectives of the experimental research concerning circulation waters: to reduce concentration of lipophilic wood extractives (LWEs) and to treat the concentrated residues from evaporation and membrane filtration by low-pressure catalytic wet oxidation. Ozone was found to selectively react with LWEs. The selectivity of ozonation defined as the ratio of the rate coefficients of the reactions with LWEs and other organic matter was found to be from 3 to 20. The reaction was always found to be of fast or moderate rate and, therefore, no dissolved ozone could be detected in water during ozonation. However, the ozone dose necessary to remove 90% of the LWEs in TMP water was found to be rather high, from 500 to 800 mg O3/l. This was determined by high content of organic matter, COD ranged between 3 and 6 kg O2/m3. The implementation of ozone for LWEs removal is therefore problematic from economical point of view. Catalytic low pressure-wet oxidation of membrane and evaporation concentrates was found to be effective: 50% of COD were removed under 150°C with subsequent increase of the wastewater biodegradability. Closure of water circulations, concentrates, lipophilic wood extractives, ozonation, paper mill, thermomechanical pulp, wet oxidation This content is only available as a PDF. © IWA Publishing 1999 You do not currently have access to this content.