Premium
Treatment of Algal‐Laden Water: Pilot‐Plant Experiences
Author(s) -
KAUR K.,
BOTT T. R.,
HEATHCOTE G. R.,
KEAY G.,
LEADBEATER B. S. C.
Publication year - 1994
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/j.1747-6593.1994.tb01089.x
Subject(s) - eutrophication , environmental science , water treatment , anthracite , activated carbon , filtration (mathematics) , dissolved air flotation , ozone , pilot plant , environmental engineering , algae , chlorine , environmental chemistry , waste management , sewage treatment , chemistry , coal , adsorption , ecology , nutrient , biology , statistics , mathematics , organic chemistry , engineering
In recent years an increase in the eutrophication of reservoirs has added to the problems of lowland surface‐water treatment. A pilot plant was installed to test the effectiveness of various treatment regimes for a river source which was subject to occasional algal blooms, and a eutrophic reservoir source which was heavily contaminated with cyanobacteria ( Oscillatoria sp. ). The treatment processes adopted were dissolved‐air flotation for chemical coagulation, sand and anthracite filtration, comparative disinfection stages using ozone and chlorine followed by granular activated carbon filtration. The dissolved‐air flotation plant was not particularly effective for the removal of algae, but the sand/anthracite filtration process was capable of removing 50% of the algae. The ozone disinfection stage was adequate for disinfection and also reduced algal numbers. Overall the chlorine/granular activated carbon method did not perform as effectively as the ozone/granular activated carbon process; the iatter process was +99% effective for algai control, with river and reservoir sources.