Ceramac – ceramic microfiltration as pretreatment technology for IJssel Lake water

An extensive pilot study of ceramic microfiltration (MF) in the Ceramac configuration for treating IJssel Lake water was conducted at a demonstration-scale. At a gross flux of 75 LMH, a backwash interval of 30 minutes, and a chemically enhanced backwash after the 11th backwash, a nearly constant specific flux of about 500 LMH/bar (corrected to a temperature of 10 degrees Celsius) was observed during the three month testing period. After the ceramic MF, UV transmission (UVT) increased from 89.0% (feed water) to 93.1% (filtrated water), on average. The pilot study results show the Ceramac is feasible and reliable pretreatment technology for IJssel Lake water, and that a target UVT of 92% for the downstream advanced oxidation process (i.e., UV and hydrogen peroxide) could be achieved.