In dead-end filtration there is no need for crossflow pumps, and the UF membrane fiber diameter can be drastically reduced. This allows for a high packing density in membrane modules, thus decreasing costs and footprint. Since all feedwater is forced through the membrane, all rejected matter (suspended solids and microbiology) will be retained on the membrane surface.
Rejected matter has to be frequently removed by reversing the flow in backwashes. At regular time intervals, the filtration process is stopped and a small portion of the filtrate is reversed through the membrane. Additionally, a chemically enhanced backwash (CEB) is employed to remove adsorbed and precipitated contaminants from the membrane. As the cleaning frequency’s timing is critical, dead-end filtration requires fully automatic process control. If you have any questions, please contact us.