Effect of particle size on performance and characteristics of high concentration powdered activated carbon combined ultrafiltration process

The high concentration powder activated carbon-ultrafiltration membrane(HCPAC-UF) process was employed to remove nitrogen from the slightly polluted water. The effect of particle size of the PAC on the performance of HCPAC-UF process was investigated. The result showed that the PAC size had negligible effect on the removal efficiency of UV₂₅₄ and DOC, but significantly influenced the growth environment of the microorganism in the system. The PAC of smaller size inhibited the growth of microorganisms and could effectively protect the membrane from pollution. The work presented here is therefore of great significance in the optimization of the HCPAC-UF processing parameters.