Series HF - 10 to 220 Gallons per Minute
Ultrafiltration (UF) Systems with Hollow Fiber Membranes

Advantages of Ultrafiltration:

Low fouling membrane modules
Excellent filtration performance with high flux
High chemical resistance and temperature tolerance for effective membrane cleaning
Very fine nominal pore diameter (0.03 µm)
High removal efficiency of bacteria and viruses
Dead-end or concentrate bleed flow capabilities
Can be periodically back washed and air scoured to improve performance and extend operating life by removing the fouling layer
Simple, vertical, modular design allows low cost, compact systems
UF Outside-In or Inside-Out Configuration allows for less plugging and higher solids loading, higher flow area and easier cleaning.

Key Features of Applied Membranes Water Filtration Systems:

Over 25 years of experience is reflected in our quality
Heavy duty powder coated frame
SS High pressure components, SS Pump
Touch Screen PLC Operation
Conservatively engineered for reliable long term performance
Factory tested to ensure trouble-free operation

Applied Membranes' Ultrafiltration UF Systems are Available in either Outside-In and Inside-Out Configurations.

Outside-In configuration is recommended for applications with feed water higher than 150 ppm total suspended solids.
Outside-In configuration UF Systems use DOW UF Low fouling Hydrophilic Polyvinylidenefluoride (H-PVDF) Hollow Fiber Ultrafiltration Membranes. (click for DOW UF Membrane Specifications)
Inside-Out configuration UF Systems use Hydranautics HYDRAcap Low fouling Hydrophilic Polyethersulfone Hollow Fiber Ultrafiltration Membranes. (click for Hydranautics UF Membrane Specifications)

Touch Screen P&ID Screen for Inside-Out UF System Shown

Series HF Ultrafiltration System Specifications

Inside-Out Model #'s	Outside-In Model #'s	Capacity			Number of elements*	Line sizes			Dimensions						Approx. Weight
		GPM	GPD	m3/hr		Inlet (Inches)	Filtrate (inches)	Backwash (inches)	Length		Width		Height		Approx. Weight
									Length		Width		Height		lb	kg
									in.	cm.	in.	cm.	in.	cm.	lb	kg
HF60-1I	HF60-1IE	10	14,400	2.3	1	1.5	1.5	1.5	60	152	30	76	76	193	1000	454
HF60-4I	HF60-4IE	40	57,600	9.0	4	4	4	4	80	203	30	76	76	193	1500	680
HF60-10I	HF60-10E	100	144,000	22.7	10	4	4	4	110	279	50	76	114	290	3000	1360
HF60-14I	HF60-14E	140	201,600	31.8	14	6	6	6	140	356	50	76	114	290	4200	1905
HF60-18I	HF60-18E	180	259,200	40.9	18	6	6	6	180	457	50	76	114	290	5500	2495
HF60-22I	HF60-22E	220	316,800	50.0	22	6	6	6	220	559	50	76	114	290	6300	2858

*Systems of any capacity can be put together by using multiple modules

Applied Membrane's Ultrafiltration Systems use Hydranautics HYDRAcap® Hollow Fiber Ultrafiltration Modules, DOW UF / Omexcell Ultrafiltration Modules

About Hydranautics HYDRAcap Hollow Fiber UF Modules:

HYDRAcap products contain capillary fiber membrane made from a hydrophilic polyether sulfone, with a nominal molecular weight cutoff of 150,000 Daltons. Feed water enters the center (lumen) of the fibers and permeates through the membrane radially outward, producing a filtrate turbidity typically less than 0.07 NTU. A magnified, cross sectional view of the membrane is shown in figure 1 to the right.

The HYDRAcap modules in these systems are operated in the directional flow ("dead-end") method, where all of the feed water is converted to filtrate. The Ultrafiltration modules are regularly backwashed to restore permeability, which declines as solids build up on the membrane. The pH tolerance (1.5 - 13.0) of the membrane allows for the addition of chemicals for cleaning and chemically enhanced backwashing.

Figure 1 - Hollow Fiber Membrane

About DOW UF Modules:

The DOW™ Ultrafiltration module utilizes a double-walled hollow fiber (capillary) PVDF membrane which has a very small nominal pore diameter for PVDF material that allows for the removal of all particulate matter, bacteria and most viruses and colloids. Despite the small pore diameter, the membrane has a very high porosity resulting in a flux similar to that of micro-filtration (MF) and can effectively replace MF in most cases.

Systems designed with DOW™ Ultrafiltration use an outside-in flow configuration which allows for less plugging, higher solids loading, higher flow area and easy cleaning. The primary flow design is dead-end filtration but the module can be operated using a concentrate bleed. Dead-end filtration uses less energy and has a lower operating pressure than the concentrate bleed, therefore reducing operating costs.

Typically, DOW™ Ultrafiltration is operated at a constant permeate flow. The transmembrane pressure (TMP) will naturally increase over time and the module can be cleaned periodically by back flushing and air scouring to remove the fouling layer. Disinfectants and other cleaning agents can be used to fully remove and prevent performance loss due to biological growth as well as other foulants.

About DOW OMEXELL Ultrafiltration Membranes:

The OMEXELL™ ultrafiltration modules are made from high strength, hollow fiber membranes that have excellent features and benefits:

0.03 μ nominal pore diameter for removal of bacteria, viruses, and particulates including colloids to protect downstream processes such as RO
PVDF polymeric hollow fibers for high strength and chemical resistance allows long membrane life
Hydrophilic PVDF fibers for easy cleaning and wettability that help maintain long term performance
Outside In flow configuration for high tolerance to feed solids that help reduce the need for pretreatment processes
U-PVC housing, helping to eliminate the need for costly pressure vessels

What is Ultrafiltration (UF)?

Ultrafiltration or UF is a pressure driven membrane separation process that separates particulate matter from soluble components in the carrier fluid (such as water). UF membranes typically have pore sizes in the range of 0.01 - 0.10 µm and have a high removal capability for bacteria and most viruses, colloids and silt (SDI). The smaller the nominal pore size, the higher the removal capability. Most materials that are used in UF are polymeric and are naturally hydrophobic. Common polymeric materials used in UF include: Polysulfone (PS), Polyethersulfone (PES), Polypropylene (PP), or Polyvinylidenefluoride (PVDF). Although these materials can be blended with hydrophilic agents, they can reduce the membranes ability to be cleaned with high strength disinfectants such as hypochlorite that impacts removal of bacterial growth.

Click here to view the article "About Ultrafiltration" by Dr. Gil Dhawan, President of Applied Membranes, Inc.

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