Ozone was reported to have significant positive
aid-coagulation effectiveness on particle removal at
low dosages, especially in organic rich raw water
(Reckhow et al., 1986; Edwards and Benjamin, 1992),
but in some cases preozonation hinders the removal of
turbidity and increases the concentration of residual
coagulant metals at low coagulant doses (Edwards et
al., 1994)