Challenge of High Water Hardness and Elevated Temperature: MBR Pilot Trials in the Paper Industry under Mesophilic and Thermophilic Conditions

  • Benjamin Simstich
  • Hakan Cücük
  • Svenja Bierbaum

Abstract

The results of two MBR pilot trials conducted in paper mills are discussed. In the first trial it was possible to operate a MBR pilot plant under the challenges of extremely high water hardness and a mean calcium concentration of 770 mg/L that caused massive scaling problems. An upstream lime softening pilot plant was designed and constructed. As a result, the flux increased again and the cleaning intervals could be extended significantly. With the help of lime softening, 50-80 % of the calcium was removed upstream of the MBR pilot plant. The second part of the paper describes trials using a thermophilic aerobic MBR (TMBR) at 50?°C. A new and innovative use of submerged flat-sheet MBR-modules to treat paper industry circuit wastewater was studied. The elimination rates of the TMBR regarding COD and BOD5 were 83 % and 99 %, respectively. A pilot trial was conducted at a flux of 4.5 to 8.5 L/m²/h. Lab experiments with a smaller membrane module had shown a higher flux of 8 to 13 L/m²/h.
Veröffentlicht
2013-06-14
Zitieren
SIMSTICH, Benjamin; CÜCÜK, Hakan; BIERBAUM, Svenja. Challenge of High Water Hardness and Elevated Temperature: MBR Pilot Trials in the Paper Industry under Mesophilic and Thermophilic Conditions. gwf Wasser | Abwasser, [S.l.], v. 152, n. Special 1, p. 78 - 83, juni 2013. ISSN 0016-3651. Verfügbar unter: <http://ojs.di-verlag.de/index.php/gwf_wa/article/view/1167>. Date accessed: 05 juni 2020.