Cyanobacteria removal by electroflotation with titanium electrodes

• DOI: 10.5004/dwt.2023.29388
• Publication Date: 2023-07-08T19:11:36Z
• Authors: Tiago Burgardt; Thyara Martins No...; Fernando Hymnô de...; Benny Zuse Rousso; Maurício Luiz Sens

Harmful cyanobacteria blooms are a major concern for water managers worldwide because they have negative environmental, social and economic impacts.This study aimed to evaluate removal performance quality by electroflotation using titanium electrodes as pre-treatment in treatment plants (WTPs).Water quality, toxicity, cyanobacterial cell integrity cyanotoxin analysis were performed.An experimental design was carried out determine the optimum operational parameters (OOP) removal.The identified OOP flow rate of 100.06 m 3 •m -2 •d -1 current density 72.10 A•m , resulting an energy consumption 1.97 kWh•m -3 .The reactor at OOP, operating 6h, able remove 97% continuous reactor.Furthermore, dissolved organic carbon, turbidity, apparent color decreased 41%, 55%, 52%, respectively.Phytotoxicity analyses showed seed germination radicle growth rates greater than 75% hypocotyl inhibition from 3% 22%.Roots no compared with positive control.Cell permeability revealed wall alterations after electroflotation; however, cyanotoxins not detected treated water.These findings indicate that is viable alternative pretreatment WTPs.