Eutrophic lake water treatment using a diatomite porous ceramic membrane

摘要

A porous ceramic membrane was prepared to remove algae in eutrophic lake water. Effects of preparation parameters, including starch content, granulation mesh size, and molding pressure on water quality index removal were also investigated in detail. The results showed that starch content, granulation mesh size, molding pressure influence water flux, removal of Chl-a, and turbidity. The optimized preparation conditions of the ceramic membrane were starch content of 15%, granulation mesh size of 40 mesh and molding pressure of 30 MPa. Under the treatment conditions of trans-membrane pressure 0.09 MPa, filter time 30 min by the prepared membrane, the removal percentages of Chl-a, turbidity, CODMn, TN, and TP were up to 99.62, 99.04, 33.89, 19.61, and 61.37%, respectively. The porous ceramic membrane can be effectively used to treat eutrophic lake water with high flux, outstanding efficiency, and excellent stability.