Removal of model waste-water bacteria by magnetite in water and waste-water treatment processes

  • Author / Creator
    Mann, Ajaypal S
  • Conventional disinfection processes used for water and waste-water treatment such as chlorination, and ozonation produce disinfection by products which are carcinogenic. The use of magnetite as an alternative method of removing pathogenic microorganisms from the water streams was proposed as it does not produce any harmful by products. The removal of three model bacteria Escherichia coli ATCC® 25922™, Pseudomonas putida ATCC® 17453™ and Micrococcus luteus ATCC® 4698™ using magnetite and the mechanism of removal has been studied in this thesis. It was found that at a cell : magnetite ratio of 1:50 the removal of bacterial cells was 96.8% for E. coli, 94.8% for P. putida and 99.7% for M luteus. To better understand the removal mechanism the effect of varying magnetite ratios, buffers, pH, and mixing times were also studied. The analyses indicate that magnetite could be efficiently used for disinfection processes in water and waste-water treatment industry.

  • Subjects / Keywords
  • Graduation date
    Fall 2012
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.