Preparation of a Magnetic, Hydrophilic and Bacteria Attachable Ceramsite and its Application in Wastewater Treatment

Recently, using ceramsite to treat wastewater has received wide attention. In this tudy, the ceramsite packing material was modified to make it more ready for bacteria attachment and improved its waste-water treatment efficiency by magnetic field. In addition, the optimal percentage of the additive was obtained through the wastewater treatment experiments in a contact aeration bioreactors. The results showed that the optimal percentage of magnetic powder, polyvinyl alcohol, amylum, sodium bicarbonate, and expanded perlite was 7%, 3%, 2%, 5% and 10% respectively. And the performance of the modified ceramsite in the contact aeration bioreactors was compared with the packing which without magnetic powder, polyvinyl alcohol and amylum showed that the modified ceramsitethe had obviously advantages in terms of time it took for the reactors to attain the stable treatment, organic reduction rate and water retention.