MICRODYN UF 1000-540
Hollow Fiber Ultrafiltration Membrane Modules
Water resources continue to be one of the top environmental concerns around the world, leading to increased water recycling efforts in water and wastewater treatment facilities globally. Getting wastewater to an acceptable level of purification for water reuse can be challenging as it requires several steps. Ultrafiltration (UF) has shown demonstrated success in this application.
UF is a process using semi-permeable membranes to separate water and some dissolved solids from the feed water. In a system using pressurized MICRODYN UF 1000-540 hollow fiber modules, the feed water may come from different sources such as surface water, groundwater, secondary wastewater effluent, seawater, industrial process water, or other sources for municipal and industrial applications.
MICRODYN UF 1000-540 hollow fiber membrane is constructed using formulated hydrophilic PVDF in an outside-in design with a nominal pore size of 0.03 microns. The outside-in design contributes to easier cleaning as it keeps the foulants on the outside of the fibers. The fiber is designed specifically to handle any aggressive feed water sources and tolerate high solids loadings and upsets. It rejects particulate matter, Giardia cysts, and Cryptosporidium oocysts, and achieves high levels of virus removal.
With MICRODYN UF, larger molecular weight materials (e.g., bacteria and pathogens) are rejected while lower molecular weight materials (e.g., water and dissolved solids) pass through the membrane surface. A braid inside the hollow fiber provides high mechanical strength to prevent fiber breakage and damage during operation.
MICRODYN UF 1000-540 membrane modules are robust and can tolerate very high levels of solids. The unique module design and hydraulics allow complete solid removal during drain cycles and therefore, minimal fouling or chance for continual solid accumulation. The screening requirements are the least stringent in the market with only 3.0 mm punched hole pre-screening. This is far less than any other pressurized UF system, typically requiring at least 300 µm screen sizes.
At the bottom of the module, fibers are not potted and instead are sealed and are free to move. This allows for very high air penetration and fiber movement, which results in effective solids removal and the ability to operate at higher levels of suspended solids. Unlike competitive UF modules, the design of the MICRODYN UF 1000-540 module allows for greater than 150 mg/l of coagulant dosage (depending on the type of coagulant) without the need for clarification prior to the UF system. This results in a tolerance for higher suspended solids (TSS) with lower capital costs.
- RO pretreatment
- Surface water treatment (plant influent)
- Water reuse
- Tertiary wastewater treatment
- Seawater treatment