Electro-osmotic dewatering of high moisture flax stems

Gopu Raveendran Nair, Ashutosh Singh, Jiby Kurian, Vijaya Raghavan

Research output: Contribution to journalArticlepeer-review


Retted flax stems contained high amounts of water from the pre-soaking and retting processes. Electro-osmotic dewatering was investigated as a pre-drying process for high-moisture flax stems using a bench electro-osmotic roller press. The various parameters affecting electroosmotic dewatering were cylinder pressure (1000kPa-3000kPa), applied voltage (12V-36V) and pre-soaking time of the flax stem (12 h-36h). An experiment was designed using central composite design. From the experiments, a maximum of 38.34% of the total water contained in the stem was removed using 12h soaking; 1000kPa cylinder pressure and 36V applied voltage during the electro-osmotic treatment. For a given soaking time, at 36V with 3000kPa cylinder pressure the maximum water removal occurred. The electro-osmotic permeability of the stems at various conditions was studied. In all the treatments, electro-osmotic permeability ranged between 3.32×10-5m2V-1s-1 and 1.22×10-4m2V-1s-1. Electro-osmotic permeability was found to increase with increasing water removal and decreased with increasing applied voltage.

Original languageEnglish (US)
Pages (from-to)14-20
Number of pages7
JournalBiosystems Engineering
StatePublished - May 1 2015
Externally publishedYes


  • Drying
  • Electro-osmosis
  • Flax fibre
  • Retting

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Food Science
  • Animal Science and Zoology
  • Agronomy and Crop Science
  • Soil Science


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