| Title |
Removal of Microcystis aeruginosa using Pine Needle Extracts |
| DOI |
https://doi.org/10.15681/KSWE.2017.33.1.8 |
| Keywords |
Algal blooms; Cyanobacterium; Inhibition; M. aeruginosa; Pine needle extract; Water treatment |
| Abstract |
Microcystis aeruginosa (M. aeruginosa) is a cyanobacterium species that can form harmful algal blooms in freshwater bodies worldwide. The use of pine needle extract (PNE) to control nuisance algae by allelopathic inhibition will be environmentally friendly and promising. PNE successfully removed up to 98% of M. aeruginosa at the following optimal conditions: pH 7, 25 °C, 100 rpm of mixing rate, 5 min of mixing time. These results indicated that 1 g/L PNE was removed 1g dry weight/L of M. aeruginosa. The kinetic data showed that substrate inhibition kinetics and maximum growth rate were obtained when the M. aeruginosa was grown in a medium containing 0.5 g/L of initial concentration of PNE. Different substrate inhibition models were fitted to the kinetic data; the Luong model was found to be best. The model-predicted kinetic parameters were in agree-ment with the experimental findings. The natural extract, PNE, can be a promising inhibition because its high efficiency and low dose requirements. |